Records Maintenance on a Data Set
Records Maintenance on a Data Set
Fundamentals of Record Maintenance
Introduction
Record maintenance consists of locating a value or a record, changing a value or a record, or deleting a value or a record. To assist you with this, the various classes of the System.Data namespace are equipped with many useful methods.
Practical Learning: Introducing Tables Columns
body {
padding-top: 150px;
background-color: #EEEEEE;
}
.bold { font-weight: 600; }
.small { width: 80px; }
.medium { width: 120px; }
.large { width: 175px; }
.sub-title { border-bottom: 1px solid black; }
#top-banner { top: 0;
left: 0;
right: 0;
width: 100%;
bottom: auto;
position: fixed;
height: 5.75em;
background-color: #192E46; }
#bottom-banner { left: 0;
right: 0;
bottom: 0;
top: auto;
width: 100%;
position: fixed;
height: 4.15em;
background-color: #003366;
border-top: 5pt solid black; }
#copyright { margin-top: 1em;
font-size: 1.15em;
text-align: center;
line-height: 1.15em;
color: lightcyan; }
.utility-container { margin: auto;
width: 400px; }
.body-holder { margin: auto;
width: 800px; }
.centralizer { margin: auto;
width: 700px; }
.col-md-3 { border-radius: 6px;
padding-top: 10px;
padding-bottom: 10px;
background-color: #800000;
border: 1px solid #000000; }
.jumbotron { padding-top: 3px;
border-radius: 10px;
background-color: #f1ddca; }
.jumbotron h1 { font-size: 43px;
color: #800000; }
.lead { margin-bottom: 0; }
.topic { float: left; }
.topic a:link, .topic a:active,
.topic a:visited, .topic a:hover {
height: 32px;
font-size: 12pt;
line-height: 26px;
margin-left: -10px;
padding-left: 20px;
text-decoration: none;
display: inline-block;
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
.topic, .topic a:link, .topic a:active,
.topic a:visited, .topic a:hover { width: 190px; }
.topic a:link { color: #FFFF00; }
.topic a:active { color: #CC99FF; }
.topic a:visited { color: #FFCC99; }
.topic a:hover { color: #FFFFFF;
background-color: #ff6a00;
display: inline-block;
outline: 1pt solid #CCFF33; }
.navbar { border-bottom: 5px solid navy;
border-top: 5px solid #faf76f; }
.navbar-inverse { background-color: orange;
border-color: #080808; }
.navbar-fixed-top { top: 80px; }
.navbar-inverse .navbar-nav > li > a,
.navbar-inverse .navbar-nav > li > a:link {
color: #faf76f;
background-color: transparent; }
.navbar-inverse .navbar-nav > li > a:hover,
.navbar-inverse .navbar-nav > li > a:focus {
color: orange;
background-color: #faf76f; }
.common-font { font-family: Garamond, Georgia, 'Times New Roman', serif; }using System.Web.Optimization;
namespace GasUtilityCompany1
{
public class BundleConfig
{
// For more information on bundling, visit https://go.microsoft.com/fwlink/?LinkId=301862
public static void RegisterBundles(BundleCollection bundles)
{
bundles.Add(new ScriptBundle("~/bundles/jquery").Include(
"~/Scripts/jquery-{version}.js"));
bundles.Add(new ScriptBundle("~/bundles/jqueryval").Include(
"~/Scripts/jquery.validate*"));
// Use the development version of Modernizr to develop with and learn from. Then, when you're
// ready for production, use the build tool at https://modernizr.com to pick only the tests you need.
bundles.Add(new ScriptBundle("~/bundles/modernizr").Include(
"~/Scripts/modernizr-*"));
bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(
"~/Scripts/bootstrap.js"));
bundles.Add(new StyleBundle("~/Content/css").Include(
"~/Content/bootstrap.css",
"~/Content/site.css",
"~/Content/GasUtilityCompany.css"));
}
}
}<!DOCTYPE html>
<html>
<head>
<title>Gas Utility Company :: @Page.Title</title>
@RenderSection("head", required: false)
@Styles.Render("~/Content/css")
@Scripts.Render("~/bundles/modernizr")
</head>
<body>
<header id="top-banner">
<p class="text-center"><img src="~/Images/guc.png" alt="Gas Utility Company" width="649" height="74" /></p>
</header>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="centralizer">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li>@Html.ActionLink("GUC Home", "Index", "Home")</li>
<li>@Html.ActionLink("Gas Meters", "Index", "GasMeters")</li>
<li>@Html.ActionLink("Customers", "Index", "Customers")</li>
<li>@Html.ActionLink("Gas Bills", "Index", "GasBills")</li>
<li>@Html.ActionLink("Payments", "Index", "Payments")</li>
<li>@Html.ActionLink("Community", "Index", "Home")</li>
<li>@Html.ActionLink("Careers", "Index", "Home")</li>
<li>@Html.ActionLink("About GUC", "About", "Home")</li>
<li>@Html.ActionLink("Contact Us", "Contact", "Home")</li>
</ul>
</div>
</div>
</div>
</div>
<div class="body-holder">
@RenderBody()
</div>
<hr />
<footer id="bottom-banner">
<p id="copyright">© @DateTime.Now.Year - Gas Utility Company</p>
</footer>
</body>
</html>using System; using System.IO; using System.Data; using System.Web.Mvc; namespace GasDistribution2.Controllers { public class GasMetersController : Controller { private readonly DataColumn dcMake; private readonly DataColumn dcModel; private readonly DataColumn dcGasMeterID; private readonly DataColumn dcMeterNumber; private readonly DataColumn dcCounterValue; private readonly DataColumn dcMeterReadingDate; public DataTable dtGasMeters; public DataSet dsGasMeters; public GasMetersController() { dcGasMeterID = new DataColumn("gas-meter-id"); dcGasMeterID.AutoIncrement = true; dcGasMeterID.AutoIncrementSeed = 1; dcGasMeterID.AutoIncrementStep = 1; dcMeterNumber = new DataColumn("meter-number"); dcMeterNumber.Unique = true; dcMeterNumber.DataType = Type.GetType("System.String"); dcMake = new DataColumn("make"); dcMake.DataType = Type.GetType("System.String"); dcModel = new DataColumn("model"); dcModel.DataType = Type.GetType("System.String"); dcMeterReadingDate = new DataColumn("meter-reading-date", Type.GetType("System.DateTime")); dcCounterValue = new DataColumn("counter-value"); dcCounterValue.DataType = Type.GetType("System.Int32"); dtGasMeters = new DataTable("gas-meter"); dtGasMeters.Columns.Add(dcGasMeterID); dtGasMeters.Columns.Add(dcMeterNumber); dtGasMeters.Columns.Add(dcMake); dtGasMeters.Columns.Add(dcModel); dtGasMeters.Columns.Add(dcMeterReadingDate); dtGasMeters.Columns.Add(dcCounterValue); dsGasMeters = new DataSet("gas-meters"); dsGasMeters.Tables.Add(dtGasMeters); } // GET: GasMeters public ActionResult Index() { return View(); } . . . No Change } }
using System; using System.IO; using System.Data; using System.Web.Mvc; namespace GasUtilityCompany10.Controllers { public class CustomersController : Controller { private readonly DataColumn dcCity; private readonly DataColumn dcState; private readonly DataColumn dcCounty; private readonly DataColumn dcZIPCode; private readonly DataColumn dcAddress; private readonly DataColumn dcLastName; private readonly DataColumn dcFirstName; private readonly DataColumn dcCustomerID; private readonly DataColumn dcMeterNumber; private readonly DataColumn dcAccountNumber; public DataTable dtCustomers; private DataSet dsCustomers; public CustomersController() { dcCustomerID = new DataColumn("customer-id") { AutoIncrement = true, AutoIncrementSeed = 1, AutoIncrementStep = 1 }; dcCity = new DataColumn("city", Type.GetType("System.String")); dcState = new DataColumn("state", Type.GetType("System.String")); dcCounty = new DataColumn("county", Type.GetType("System.String")); dcAddress = new DataColumn("address", Type.GetType("System.String")); dcZIPCode = new DataColumn("zip-code", Type.GetType("System.String")); dcLastName = new DataColumn("last-name", Type.GetType("System.String")); dcFirstName = new DataColumn("first-name", Type.GetType("System.String")); dcMeterNumber = new DataColumn("meter-number", Type.GetType("System.String")); dcAccountNumber = new DataColumn("account-number", Type.GetType("System.String")) { Unique = true }; dtCustomers = new DataTable("customer"); dtCustomers.Columns.Add(dcCustomerID); dtCustomers.Columns.Add(dcAccountNumber); dtCustomers.Columns.Add(dcMeterNumber); dtCustomers.Columns.Add(dcFirstName); dtCustomers.Columns.Add(dcLastName); dtCustomers.Columns.Add(dcAddress); dtCustomers.Columns.Add(dcCity); dtCustomers.Columns.Add(dcCounty); dtCustomers.Columns.Add(dcState); dtCustomers.Columns.Add(dcZIPCode); dsCustomers = new DataSet("customers"); dsCustomers.Tables.Add(dtCustomers); } // GET: Customers public ActionResult Index() { return View(); } . . . No Change } }
using System; using System.IO; using System.Data; using System.Web.Mvc; namespace GasUtilityCompany10.Controllers { public class GasBillsController : Controller { private readonly DataColumn dcGasBillID; private readonly DataColumn dcAmountDue; private readonly DataColumn dcStateTaxes; private readonly DataColumn dcLocalTaxes; private readonly DataColumn dcConsumption; private readonly DataColumn dcBillingDays; private readonly DataColumn dcTotalTherms; private readonly DataColumn dcOver50Therms; private readonly DataColumn dcTotalCharges; private readonly DataColumn dcAccountNumber; private readonly DataColumn dcFirst50Therms; private readonly DataColumn dcDeliveryTotal; private readonly DataColumn dcLateAmountDue; private readonly DataColumn dcPaymentDueDate; private readonly DataColumn dcCounterReadingEnd; private readonly DataColumn dcCounterReadingStart; private readonly DataColumn dcMeterReadingEndDate; private readonly DataColumn dcEnvironmentalCharges; private readonly DataColumn dcMeterReadingStartDate; private readonly DataColumn dcTransportationCharges; private readonly DataColumn dcDistributionAdjustment; public DataTable dtGasBills; private DataSet dsGasBills; public GasBillsController() { dcGasBillID = new DataColumn("gas-bill-id") { AutoIncrement = true, AutoIncrementSeed = 1, AutoIncrementStep = 1 }; dcAmountDue = new DataColumn("amount-due", Type.GetType("System.Decimal")); dcConsumption = new DataColumn("consumption", Type.GetType("System.Int32")); dcBillingDays = new DataColumn("billing-days", Type.GetType("System.Int32")); dcLocalTaxes = new DataColumn("local-taxes", Type.GetType("System.Decimal")); dcStateTaxes = new DataColumn("state-taxes", Type.GetType("System.Decimal")); dcTotalTherms = new DataColumn("total-therms", Type.GetType("System.String")); dcTotalCharges = new DataColumn("total-charges", Type.GetType("System.Decimal")); dcAccountNumber = new DataColumn("account-number", Type.GetType("System.String")); dcOver50Therms = new DataColumn("over-50-therms", Type.GetType("System.Decimal")); dcDeliveryTotal = new DataColumn("delivery-total", Type.GetType("System.Decimal")); dcFirst50Therms = new DataColumn("first-50-therms", Type.GetType("System.Decimal")); dcLateAmountDue = new DataColumn("late-amount-due", Type.GetType("System.Decimal")); dcPaymentDueDate = new DataColumn("payment-due-date", Type.GetType("System.DateTime")); dcCounterReadingEnd = new DataColumn("counter-reading-end", Type.GetType("System.Int32")); dcCounterReadingStart = new DataColumn("counter-reading-start", Type.GetType("System.Int32")); dcEnvironmentalCharges = new DataColumn("environmental-charges", Type.GetType("System.Decimal")); dcMeterReadingEndDate = new DataColumn("meter-reading-end-date", Type.GetType("System.DateTime")); dcTransportationCharges = new DataColumn("transportation-charges", Type.GetType("System.Decimal")); dcDistributionAdjustment = new DataColumn("distribution-adjustment", Type.GetType("System.Decimal")); dcMeterReadingStartDate = new DataColumn("meter-reading-start-date", Type.GetType("System.DateTime")); dtGasBills = new DataTable("gas-bill"); dtGasBills.Columns.Add(dcGasBillID); dtGasBills.Columns.Add(dcAccountNumber); dtGasBills.Columns.Add(dcMeterReadingStartDate); dtGasBills.Columns.Add(dcMeterReadingEndDate); dtGasBills.Columns.Add(dcBillingDays); dtGasBills.Columns.Add(dcCounterReadingStart); dtGasBills.Columns.Add(dcCounterReadingEnd); dtGasBills.Columns.Add(dcConsumption); dtGasBills.Columns.Add(dcTotalTherms); dtGasBills.Columns.Add(dcTransportationCharges); dtGasBills.Columns.Add(dcFirst50Therms); dtGasBills.Columns.Add(dcOver50Therms); dtGasBills.Columns.Add(dcDeliveryTotal); dtGasBills.Columns.Add(dcDistributionAdjustment); dtGasBills.Columns.Add(dcEnvironmentalCharges); dtGasBills.Columns.Add(dcTotalCharges); dtGasBills.Columns.Add(dcLocalTaxes); dtGasBills.Columns.Add(dcStateTaxes); dtGasBills.Columns.Add(dcPaymentDueDate); dtGasBills.Columns.Add(dcAmountDue); dtGasBills.Columns.Add(dcLateAmountDue); dsGasBills = new DataSet("gas-bills"); dsGasBills.Tables.Add(dtGasBills); } // GET: GasBills public ActionResult Index() { return View(); } . . . No Change } }
using System; using System.IO; using System.Data; using System.Web.Mvc; namespace GasUtilityCompany1.Controllers { public class PaymentsController : Controller { private readonly DataColumn dcGasBillID; private readonly DataColumn dcPaymentID; private readonly DataColumn dcPaymentDate; private readonly DataColumn dcPaymentAmount; private readonly DataColumn dcPaymentStatus; private DataTable dtPayments; private DataSet dsPayments; public PaymentsController() { dcPaymentID = new DataColumn("payment-id") { AutoIncrement = true, AutoIncrementSeed = 1, AutoIncrementStep = 1 }; dcPaymentStatus = new DataColumn("payment-status") { DataType = Type.GetType("System.String") }; dcGasBillID = new DataColumn("gas-bill-id", Type.GetType("System.Int32")); dcPaymentDate = new DataColumn("payment-date", Type.GetType("System.DateTime")); dcPaymentAmount = new DataColumn("payment-amount", Type.GetType("System.Decimal")); dtPayments = new DataTable("payment"); dtPayments.Columns.Add(dcPaymentID); dtPayments.Columns.Add(dcPaymentDate); dtPayments.Columns.Add(dcGasBillID); dtPayments.Columns.Add(dcPaymentAmount); dtPayments.Columns.Add(dcPaymentStatus); dsPayments = new DataSet("payments"); dsPayments.Tables.Add(dtPayments); } . . . No Change } }
Creating a Record
The DataSet supports all regular operations of a database. The primary operation consists of creating records. This consists of creating a row, adding it to a data set, and then saving the data set.
Practical Learning: Creating Records
using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class GasMetersController : Controller
{
. . . No Change
// GET: GasMeters/Create
public ActionResult Create()
{
return View();
}
// POST: GasMeters/Create
[HttpPost]
public ActionResult Create(FormCollection collection)
{
try
{
// TODO: Add insert logic here
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (!string.IsNullOrEmpty(collection["MeterNumber"]))
{
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasMeters.ReadXml(fsGasMeters);
}
}
DataRow drGasMeter = dtGasMeters.NewRow();
drGasMeter["meter-number"] = collection["MeterNumber"];
drGasMeter["make"] = collection["Make"];
drGasMeter["model"] = collection["Model"];
drGasMeter["meter-reading-date"] = collection["MeterReadingDate"];
drGasMeter["counter-value"] = collection["CounterValue"];
dtGasMeters.Rows.Add(drGasMeter);
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
dsGasMeters.WriteXml(fsGasMeters);
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
. . . No Change
}
}
on the right side of the Use A Layout Page text box
@{
ViewBag.Title = "New Gas Meter";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">New Gas Meter</h2>
@using (Html.BeginForm())
{
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Meter #:</td>
<td>@Html.TextBox("MeterNumber")</td>
</tr>
<tr>
<td class="bold">Make:</td>
<td>@Html.TextBox("Make")</td>
</tr>
<tr>
<td class="bold">Model</td>
<td>@Html.TextBox("Model")</td>
</tr>
<tr>
<td class="large bold">Meter Reading Date:</td>
<td>
@Html.TextBox("MeterReadingDate", null,
htmlAttributes: new { type = "date" })
</td>
</tr>
<tr>
<td class="bold">Counter Value:</td>
<td>@Html.TextBox("CounterValue")</td>
</tr>
</table>
<hr />
<p class="text-center">
<a href="/GasMeters/Index" class="btn btn-warning">Gas Meters</a>
<input type="submit" name="btnCreateGasMeter"
value="Create Gas Meter" class="btn btn-warning" />
</p>
</div>
}using System; using System.IO; using System.Data; using System.Web.Mvc; namespace GasUtilityCompany1.Controllers { public class CustomersController : Controller { . . . No Change // GET: Customers/Create public ActionResult Create() { return View(); } // POST: Customers/Create [HttpPost] public ActionResult Create(FormCollection collection) { try { // TODO: Add insert logic here GasMetersController gasMtrCtrlr = new GasMetersController(); string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml"); if (!string.IsNullOrEmpty(collection["AccountNumber"])) { if (System.IO.File.Exists(strCustomersFile)) { using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read)) { dsCustomers.ReadXml(fsCustomers); } } DataRow drCustomer = dtCustomers.NewRow(); drCustomer["account-number"] = collection["AccountNumber"]; drCustomer["meter-number"] = collection["MeterNumber"]; drCustomer["first-name"] = collection["FirstName"]; drCustomer["last-name"] = collection["LastName"]; drCustomer["address"] = collection["Address"]; drCustomer["city"] = collection["City"]; drCustomer["county"] = collection["County"]; drCustomer["state"] = collection["State"]; drCustomer["zip-code"] = collection["ZIPCode"]; dtCustomers.Rows.Add(drCustomer); using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write)) { dsCustomers.WriteXml(fsCustomers); } } // Return the user to the list of customers return RedirectToAction("Index"); } catch { return View(); } } . . . No Change } }
using System; using System.IO; using System.Data; using System.Web.Mvc; namespace GasUtilityCompany1.Controllers { public class PaymentsController : Controller { . . . No Change // GET: Payments/Create public ActionResult Create() { return View(); } // POST: Payments/Create [HttpPost] public ActionResult Create(FormCollection collection) { try { // TODO: Add insert logic here string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml"); if (System.IO.File.Exists(strPaymentsFile)) { using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read)) { dsPayments.ReadXml(fsPayments); } } DataRow drPayment = dtPayments.NewRow(); drPayment["payment-date"] = collection["PaymentDate"]; drPayment["gas-bill-id"] = collection["GasBillID"]; drPayment["payment-amount"] = collection["PaymentAmount"]; drPayment["payment-status"] = collection["PaymentStatus"]; dtPayments.Rows.Add(drPayment); using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite)) { dsPayments.WriteXml(fsPayments); } return RedirectToAction("Index"); } catch { return View(); } } . . . No Change } }
@{
ViewBag.Title = "Create Bill Payment";
Layout = "~/Views/Shared/_Arrangement.cshtml";
System.Collections.Generic.List<SelectListItem> categories = new List<SelectListItem>();
categories.Add(new SelectListItem { Text = "On Time", Value = "On Time" });
categories.Add(new SelectListItem { Text = "Late Payment", Value = "Late Payment" });
}
<h2 class="text-center common-font bold">Make Gas Bill Payment</h2>
@using (Html.BeginForm())
{
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Payment Date:</td>
<td>@Html.TextBox("PaymentDate", null,
htmlAttributes: new { type = "date" })
</td>
</tr>
<tr>
<td class="bold">Gas Bill ID:</td>
<td>@Html.TextBox("GasBillID")</td>
</tr>
<tr>
<td class="bold">Payment Amount:</td>
<td>@Html.TextBox("PaymentAmount")</td>
</tr>
<tr>
<td class="large bold">Payment Status:</td>
<td>@Html.DropDownList("PaymentStatus", categories)</td>
</tr>
</table>
<hr />
<p class="text-center">
<a href="/Payments/Index" class="btn btn-warning">Gas Bills Payments</a>
<input type="submit" name="btnCreatePayment"
value="Make Gas Bill Payment" class="btn btn-warning" />
</p>
</div>
}Inserting a Record
Inserting a First Record
Besides the different techniques of creating records on a table, the DataRowCollection provides a method named InsertAt. Its syntax is:
public void InsertAt(DataRow row, int pos);
The first argument is the collection of values to be added as the new record of the table. The pos argument is the position that the new record should assume in the table. If the position is set to 0, the record would be added as the first. Here are examples:
<!DOCTYPE html>
<html>
<head>
<title>Chemistry: Periodic Table</title>
</head>
<body>
<h1>Chemistry</h1>
<h2>Periodic Table</h2>
@{
System.Data.DataTable dtElements = new System.Data.DataTable("element");
dtElements.Columns.Add("atomic-number", Type.GetType("System.Int16"));
dtElements.Columns.Add("symbol", Type.GetType("System.String"));
dtElements.Columns.Add("element-name", Type.GetType("System.String"));
dtElements.Columns.Add("atomic-weight", Type.GetType("System.Single"));
System.Data.DataSet dsChemistry = new System.Data.DataSet("chemistry");
dsChemistry.Tables.Add(dtElements);
System.Data.DataRow drElement = dtElements.NewRow();
drElement[0] = 3;
drElement[1] = "Li";
drElement[2] = "Lithium";
drElement[3] = 6.938f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 1;
drElement[1] = "H";
drElement[2] = "Hydrogen";
drElement[3] = 1.008f;
dtElements.Rows.InsertAt(drElement, 0);
}
@{
int i = 0;
<table border="5">
<tr>
<td><b>Atomic #</b></td>
<td><b>Symbol</b></td>
<td><b>Element Name</b></td>
<td><b>Atomic Weight</b></td>
</tr>
@while (i < dtElements.Rows.Count)
{
drElement = dtElements.Rows[i];
<tr>
<td>@drElement[0]</td>
<td>@drElement[1]</td>
<td>@drElement[2]</td>
<td>@drElement[3]</td>
</tr>
i++;
}
</table>
}
</body>
</html>
This would produce:
When a new record has just been created, its status is changed using an appropriate member of the DataRowState enumeration. In this case, the record would be flagged as RowState.Added. This is done automatically, to find out whether a certain record currently has the RowState.Added value, you can check the value of its RowState property.
After creating a new record, to let you set the flag as a new record, the DataRow class is equipped with a method named SetAdded. Its syntax is:
public void SetAdded();
Inserting a Last Record
To create a record as the last, set the position of the DataRowCollection.InsertAt() method to a value equal to, or higher than, the total number of items in the collection. This means that, when inserting a record, if the position is equal to or higher than the total number of records (DataRowCollection.Count), the new record would be added as the last record to the table (in both cases, the compiler would not throw an exception). Here are examples:
<!DOCTYPE html>
<html>
<head>
<title>Chemistry: Periodic Table</title>
</head>
<body>
<h1>Chemistry</h1>
<h2>Periodic Table</h2>
@{
System.Data.DataTable dtElements = new System.Data.DataTable("element");
dtElements.Columns.Add("atomic-number", Type.GetType("System.Int16"));
dtElements.Columns.Add("symbol", Type.GetType("System.String"));
dtElements.Columns.Add("element-name", Type.GetType("System.String"));
dtElements.Columns.Add("atomic-weight", Type.GetType("System.Single"));
System.Data.DataSet dsChemistry = new System.Data.DataSet("chemistry");
dsChemistry.Tables.Add(dtElements);
System.Data.DataRow drElement = dtElements.NewRow();
drElement[0] = 3;
drElement[1] = "Li";
drElement[2] = "Lithium";
drElement[3] = 6.938f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 1;
drElement[1] = "H";
drElement[2] = "Hydrogen";
drElement[3] = 1.008f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 4;
drElement[1] = "Be";
drElement[2] = "Beryllium";
drElement[3] = 9.0121831f;
dtElements.Rows.InsertAt(drElement, 500);
drElement = dtElements.NewRow();
drElement[0] = 5;
drElement[1] = "B";
drElement[2] = "Boron";
drElement[3] = 10.806f;
dtElements.Rows.InsertAt(drElement, 500);
}
@{
int i = 0;
<table border="5">
<tr>
<td><b>Atomic #</b></td>
<td><b>Symbol</b></td>
<td><b>Element Name</b></td>
<td><b>Atomic Weight</b></td>
</tr>
@while (i < dtElements.Rows.Count)
{
drElement = dtElements.Rows[i];
<tr>
<td>@drElement[0]</td>
<td>@drElement[1]</td>
<td>@drElement[2]</td>
<td>@drElement[3]</td>
</tr>
i++;
}
</table>
}
</body>
</html>
This would produce:
Inserting Between Records
You can insert a record between two existing records. To do this, pass the position of the DataRowCollection.InsertAt() method to the index you want. This would be a value to the actual array index plus 1. For example, if you want to insert an item in the second position, you would pass the position as 1. Here is an example:
<!DOCTYPE html>
<html>
<head>
<title>Chemistry: Periodic Table</title>
</head>
<body>
<h1>Chemistry</h1>
<h2>Periodic Table</h2>
@{
System.Data.DataTable dtElements = new System.Data.DataTable("element");
dtElements.Columns.Add("atomic-number", Type.GetType("System.Int16"));
dtElements.Columns.Add("symbol", Type.GetType("System.String"));
dtElements.Columns.Add("element-name", Type.GetType("System.String"));
dtElements.Columns.Add("atomic-weight", Type.GetType("System.Single"));
System.Data.DataSet dsChemistry = new System.Data.DataSet("chemistry");
dsChemistry.Tables.Add(dtElements);
System.Data.DataRow drElement = dtElements.NewRow();
drElement[0] = 3;
drElement[1] = "Li";
drElement[2] = "Lithium";
drElement[3] = 6.938f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 1;
drElement[1] = "H";
drElement[2] = "Hydrogen";
drElement[3] = 1.008f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 4;
drElement[1] = "Be";
drElement[2] = "Beryllium";
drElement[3] = 9.0121831f;
dtElements.Rows.InsertAt(drElement, 500);
drElement = dtElements.NewRow();
drElement[0] = 5;
drElement[1] = "B";
drElement[2] = "Boron";
drElement[3] = 10.806f;
dtElements.Rows.InsertAt(drElement, 500);
drElement = dtElements.NewRow(); drElement[0] = 2;
drElement[1] = "He";
drElement[2] = "Helium";
drElement[3] = 4.002602f;
dtElements.Rows.InsertAt(drElement, 1);
}
@{
int i = 0;
<table border="5">
<tr>
<td><b>Atomic #</b></td>
<td><b>Symbol</b></td>
<td><b>Element Name</b></td>
<td><b>Atomic Weight</b></td>
</tr>
@while (i < dtElements.Rows.Count)
{
drElement = dtElements.Rows[i];
<tr>
<td>@drElement[0]</td>
<td>@drElement[1]</td>
<td>@drElement[2]</td>
<td>@drElement[3]</td>
</tr>
i++;
}
</table>
}
</body>
</html>
This would produce:
There are some rules when calling the DataRowCollection.InsertAt() method. If the table does not have a column whose value is incremental (where a DataColumn.AutoIncrement is set to true), if you specify a position between 0 and the maximum number of records, the new record can be inserted between two existing records.
public void SetAdded();
Reading Records
An important operation performed on a database is to get the records of a table. In a data set, the records are held by a DataTable object in its Rows properties, which is a collection.
Practical Learning: Reading Records
using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class GasMetersController : Controller
{
. . . No Change
public GasMetersController()
{
. . . No Change
}
// GET: GasMeters
public ActionResult Index()
{
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasMeters.ReadXml(fsGasMeters);
}
}
ViewBag.GasMeters = dsGasMeters.Tables[0].Rows;
return View();
}
. . . No Change
}
}@{
ViewBag.Title = "Gas Meters";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">Gas Meters</h2>
<table class="table table-striped common-font">
<tr>
<th class="bold text-center">Gas Meter ID</th>
<th class="bold">Meter #</th>
<th class="bold">Make</th>
<th class="bold">Model</th>
<th class="bold">Counter Reading Date</th>
<th class="bold text-center">Counter Value</th>
<th>@Html.ActionLink("New Gas Meter", "Create")</th>
</tr>
@foreach (System.Data.DataRow drGasMeter in ViewBag.GasMeters)
{
string mrd = DateTime.Parse(drGasMeter["meter-reading-date"].ToString()).ToShortDateString();
<tr>
<td class="text-center">@drGasMeter["gas-meter-id"].ToString()</td>
<td>@drGasMeter["meter-number"].ToString()</td>
<td>@drGasMeter["make"].ToString()</td>
<td>@drGasMeter["model"].ToString()</td>
<td class="text-center">@mrd</td>
<td class="text-center">@drGasMeter["counter-value"].ToString()</td>
<td>
@Html.ActionLink("Edit", "Edit", new { id = @drGasMeter["gas-meter-id"].ToString() }) |
@Html.ActionLink("Details", "Details", new { id = @drGasMeter["gas-meter-id"].ToString() }) |
@Html.ActionLink("Delete", "Delete", new { id = @drGasMeter["gas-meter-id"].ToString() })
</td>
</tr>
}
</table>using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class CustomersController : Controller
{
. . . No Change
// GET: Customers
public ActionResult Index()
{
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsCustomers);
}
}
ViewBag.Customers = dsCustomers.Tables[0].Rows;
return View();
}
. . . No Change
}
}@{
ViewBag.Title = "Customers";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">Customers</h2>
<table class="table table-striped common-font">
<tr>
<th class="bold text-center">Customer ID</th>
<th class="bold text-center">Account #</th>
<th class="bold">Meter #</th>
<th class="bold">First Name</th>
<th class="bold">Last Name</th>
<th class="bold">Address</th>
<th class="bold">City</th>
<th class="bold">County</th>
<th class="bold">State</th>
<th class="bold">ZIP-Code</th>
<th>@Html.ActionLink("New Customer Account", "Create")</th>
</tr>
@foreach (System.Data.DataRow drCustomer in ViewBag.Customers)
{
<tr>
<td class="text-center">@drCustomer["customer-id"].ToString()</td>
<td>@drCustomer["account-number"].ToString()</td>
<td>@drCustomer["meter-number"].ToString()</td>
<td>@drCustomer["first-name"].ToString()</td>
<td>@drCustomer["last-name"].ToString()</td>
<td>@drCustomer["address"].ToString()</td>
<td>@drCustomer["city"].ToString()</td>
<td>@drCustomer["county"].ToString()</td>
<td>@drCustomer["state"].ToString()</td>
<td>@drCustomer["zip-code"].ToString()</td>
<td>
@Html.ActionLink("Edit", "Edit", new { id = @drCustomer["customer-id"].ToString() }) |
@Html.ActionLink("Details", "Details", new { id = @drCustomer["customer-id"].ToString() }) |
@Html.ActionLink("Delete", "Delete", new { id = @drCustomer["customer-id"].ToString() })
</td>
</tr>
}
</table>using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class GasBillsController : Controller
{
. . . No Change
// GET: GasBills
public ActionResult Index()
{
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
}
}
ViewBag.GasBills = dsGasBills.Tables[0].Rows;
return View();
}
. . . No Change
}
}@{
ViewBag.Title = "Gas Bills";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">Gas Bills</h2>
<table class="table table-striped common-font">
<tr>
<td> </td>
<td> </td>
<td colspan="3" class="bold text-center">Meter Reading</td>
<td colspan="3" class="bold text-center">Counter Reading</td>
<td colspan="5" class="bold text-center">Therms</td>
<td colspan="3" class="bold text-center">Delivery Charges</td>
<td colspan="2" class="bold text-center">Taxes</td>
<td colspan="3" class="bold text-center">Payment</td>
<td> </td>
</tr>
<tr>
<th class="bold text-center">Gas Bill ID</th>
<th class="bold text-center">Account #</th>
<th class="bold">Start Date</th>
<th class="bold">End Date</th>
<th class="bold">Days</th>
<th class="bold">Start</th>
<th class="bold">End</th>
<th class="bold">Consumption</th>
<th class="bold">Total Therms</th>
<th class="bold">Transp</th>
<th class="bold">1st 50</th>
<th class="bold">Over 50</th>
<th class="bold">Total</th>
<th class="bold">Dist. Adjust.</th>
<th class="bold">Environment</th>
<th class="bold">Total Charges</th>
<th class="bold">Local</th>
<th class="bold">State</th>
<th class="bold">Due Date</th>
<th class="bold">Amount</th>
<th class="bold">Late Amount</th>
<th>@Html.ActionLink("New Customer Account", "Create")</th>
</tr>
@foreach (System.Data.DataRow drGasBill in ViewBag.GasBills)
{
string pdd = DateTime.Parse(drGasBill["payment-due-date"].ToString()).ToShortDateString();
string mred = DateTime.Parse(drGasBill["meter-reading-end-date"].ToString()).ToShortDateString();
string mrsd = DateTime.Parse(drGasBill["meter-reading-start-date"].ToString()).ToShortDateString();
<tr>
<td class="text-center">@drGasBill["gas-bill-id"].ToString()</td>
<td>@drGasBill["account-number"].ToString()</td>
<td>@mrsd</td>
<td>@mred</td>
<td>@drGasBill["billing-days"].ToString()</td>
<td>@drGasBill["counter-reading-start"].ToString()</td>
<td>@drGasBill["counter-reading-end"].ToString()</td>
<td>@drGasBill["consumption"].ToString()</td>
<td>@drGasBill["total-therms"].ToString()</td>
<td>@drGasBill["transportation-charges"].ToString()</td>
<td>@drGasBill["first-50-therms"].ToString()</td>
<td>@drGasBill["over-50-therms"].ToString()</td>
<td>@drGasBill["delivery-total"].ToString()</td>
<td>@drGasBill["distribution-adjustment"].ToString()</td>
<td>@drGasBill["environmental-charges"].ToString()</td>
<td>@drGasBill["total-charges"].ToString()</td>
<td>@drGasBill["local-taxes"].ToString()</td>
<td>@drGasBill["state-taxes"].ToString()</td>
<td>@pdd</td>
<td>@drGasBill["amount-due"].ToString()</td>
<td>@drGasBill["late-amount-due"].ToString()</td>
<td>
@Html.ActionLink("Edit", "Edit", new { id = @drGasBill["gas-bill-id"].ToString() }) |
@Html.ActionLink("Details", "Details", new { id = @drGasBill["gas-bill-id"].ToString() }) |
@Html.ActionLink("Delete", "Delete", new { id = @drGasBill["gas-bill-id"].ToString() })
</td>
</tr>
}
</table>using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class PaymentsController : Controller
{
. . . No Change
// GET: Payments
public ActionResult Index()
{
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
}
}
ViewBag.Payments = dsPayments.Tables[0].Rows;
return View();
}
. . . No Change
}
}@{
ViewBag.Title = "Gas Bills Payments";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">Gas Bills Payments</h2>
<table class="table table-striped common-font">
<tr class="text-center">
<th class="bold">Payment ID</th>
<th class="bold">Payment Date</th>
<th class="bold">Gas Bill #</th>
<th class="bold">Payment Amount</th>
<th class="bold">payment-status</th>
<th>@Html.ActionLink("New Gas Meter", "Create")</th>
</tr>
@foreach (System.Data.DataRow drPayment in ViewBag.Payments)
{
string pmtDate = DateTime.Parse(drPayment["payment-date"].ToString()).ToLongDateString();
<tr class="text-center">
<td>@drPayment["payment-id"].ToString()</td>
<td>@pmtDate</td>
<td>@drPayment["gas-bill-id"].ToString()</td>
<td>@drPayment["payment-Amount"].ToString()</td>
<td>@drPayment["payment-status"].ToString()</td>
<td>
@Html.ActionLink("Edit", "Edit", new { id = @drPayment["payment-id"].ToString() }) |
@Html.ActionLink("Details", "Details", new { id = @drPayment["payment-id"].ToString() }) |
@Html.ActionLink("Delete", "Delete", new { id = @drPayment["payment-id"].ToString() })
</td>
</tr>
}
</table><!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Gas Utility Company :: @ViewBag.Title</title>
@Styles.Render("~/Content/css")
@Scripts.Render("~/bundles/modernizr")
</head>
<body>
<header id="top-banner">
<p class="text-center"><img src="~/Images/guc.png" alt="Gas Utility Company" width="649" height="74" /></p>
</header>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="centralizer">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<div class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li>@Html.ActionLink("GUC Home", "Index", "Home")</li>
<li>@Html.ActionLink("Gas Meters", "Index", "GasMeters")</li>
<li>@Html.ActionLink("Customers", "Index", "Customers")</li>
<li>@Html.ActionLink("Gas Bills", "Index", "GasBills")</li>
<li>@Html.ActionLink("Payments", "Index", "Payments")</li>
<li>@Html.ActionLink("Community", "Index", "Home")</li>
<li>@Html.ActionLink("Careers", "Index", "Home")</li>
<li>@Html.ActionLink("About GUC", "About", "Home")</li>
<li>@Html.ActionLink("Contact Us", "Contact", "Home")</li>
</ul>
</div>
</div>
</div>
</div>
<div class="body-holder">
<div class="col-md-3">
<div class="topic">@Html.ActionLink("Safety", "Index", "Home")</div>
<div class="topic">@Html.ActionLink("Outages", "Index", "Home")</div>
<div class="topic">@Html.ActionLink("Commercial", "Index", "Home")</div>
<div class="topic">@Html.ActionLink("Residential", "Index", "Home")</div>
<div class="topic">@Html.ActionLink("Environment", "Index", "Home")</div>
<div class="topic">@Html.ActionLink("Services/Appliances", "Index", "Home")</div>
<div class="topic">@Html.ActionLink("Community Relations", "Index", "Home")</div>
</div>
<div class="col-md-9">
@RenderBody()
</div>
</div>
<hr />
<footer id="bottom-banner">
<p id="copyright">© @DateTime.Now.Year - Gas Utility Company</p>
</footer>
@Scripts.Render("~/bundles/jquery")
@Scripts.Render("~/bundles/bootstrap")
@RenderSection("scripts", required: false)
</body>
</html>
| Meter # | Make | Model | Meter Reading Date | Counter Value |
| 582741-38 | Sinton International | D-244 | 5/22/2017 | 138 |
| 293847-27 | Arc Metal | LP2066 | 8/31/2017 | 6628 |
| 928731-59 | EnvioSmart | 84-D9703 | 12/16/2016 | 8016 |
| 797047-27 | Archimeda | LP2066 | 10/6/2015 | 725 |
| 425837-14 | EnvioSmart | 28-G4428 | 1/8/2018 | 6114 |
| 864085-92 | Sinton International | D-244 | 10/15/2014 | 226857 |
| 8288-4837 | Facial Recognition | LWBG-2930 | 12/18/2018 | 10010 |
Locating a Record
Most of the operations you want to perform on a record require that you identify the record you want to work on. To do this, you can use any of the techniques we saw already to locate a record.
Practical Learning: Finding a Record
using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class GasMetersController : Controller
{
. . . No Change
// GET: GasMeters/Details/5
public ActionResult Details(int id)
{
// DataRow drCustomerMeter = null;
DataRow drCustomerMeter = null;
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
// Open the list of records and store them in a data set
dsGasMeters.ReadXml(fsGasMeters);
// Check each record
foreach (DataRow drGasMeter in dsGasMeters.Tables[0].Rows)
{
// Look for a Gas Meter ID that has the same value as the argument to the current method
if (int.Parse(drGasMeter["gas-meter-id"].ToString()) == id)
{
// If you find such a record, get its reference
drCustomerMeter = drGasMeter;
}
}
}
}
// Send the record to the view
ViewBag.GasMeter = drCustomerMeter;
return View();
}
. . . No Change
}
}@{
ViewBag.Title = "Gas Meter Details";
Layout = "~/Views/Shared/_Arrangement.cshtml";
string mrd = DateTime.Parse(ViewBag.GasMeter["meter-reading-date"].ToString()).ToLongDateString();
}
<h2 class="text-center common-font bold">Gas Meter Details</h2>
<hr />
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Gas Meter ID:</td>
<td>@ViewBag.GasMeter["gas-meter-id"].ToString()</td>
</tr>
<tr>
<td class="bold">Meter #:</td>
<td>@ViewBag.GasMeter["meter-number"].ToString()</td>
</tr>
<tr>
<td class="bold">Make:</td>
<td>@ViewBag.GasMeter["make"].ToString()</td>
</tr>
<tr>
<td class="bold">Model:</td>
<td>@ViewBag.GasMeter["model"].ToString()</td>
</tr>
<tr>
<td class="bold">Meter Reading Date:</td>
<td>@mrd</td>
</tr>
<tr>
<td class="bold">Counter Value:</td>
<td>@ViewBag.GasMeter["counter-value"].ToString()</td>
</tr>
</table>
</div>
<hr color="black" />
<p class="text-center">
@Html.ActionLink("Edit/Update Gas Meter Information", "Edit",
new { id = @ViewBag.GasMeter["gas-meter-id"] }, null) ::
@Html.ActionLink("Delete Gas Meter", "Delete",
new { id = @ViewBag.GasMeter["gas-meter-id"] }, null) ::
@Html.ActionLink("Gas Meters", "Index")
</p>using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class CustomersController : Controller
{
. . . No Change
// GET: Customers/Details/5
public ActionResult Details(int id)
{
DataRow drCustomer = null;
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsGasMeters = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsGasMeters);
foreach (DataRow drClient in dsCustomers.Tables[0].Rows)
{
if (int.Parse(drClient["customer-id"].ToString()) == id)
{
drCustomer = drClient;
}
}
}
}
ViewBag.Customer = drCustomer;
return View();
}
. . . No Change
}
}@{
ViewBag.Title = "Customer Account Details";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">Customer Account Details</h2>
<hr />
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Customer ID:</td>
<td>@ViewBag.Customer["customer-id"].ToString()</td>
</tr>
<tr>
<td class="bold">Account #:</td>
<td>@ViewBag.Customer["account-number"].ToString()</td>
</tr>
<tr>
<td class="bold">Meter #:</td>
<td>@ViewBag.Customer["meter-number"].ToString()</td>
</tr>
<tr>
<td class="bold">First Name:</td>
<td>@ViewBag.Customer["first-name"].ToString()</td>
</tr>
<tr>
<td class="bold">Last Name:</td>
<td>@ViewBag.Customer["last-name"].ToString()</td>
</tr>
<tr>
<td class="bold">Address:</td>
<td>@ViewBag.Customer["address"].ToString()</td>
</tr>
<tr>
<td class="bold">City:</td>
<td>@ViewBag.Customer["city"].ToString()</td>
</tr>
<tr>
<td class="bold">County:</td>
<td>@ViewBag.Customer["county"].ToString()</td>
</tr>
<tr>
<td class="bold">State:</td>
<td>@ViewBag.Customer["state"].ToString()</td>
</tr>
<tr>
<td class="bold">ZIP-Code:</td>
<td>@ViewBag.Customer["zip-code"].ToString()</td>
</tr>
</table>
</div>
<hr color="black" />
<p class="text-center">
@Html.ActionLink("Edit/Update Customer Account Details", "Edit",
new { id = @ViewBag.Customer["customer-id"] }, null) ::
@Html.ActionLink("Delete Customer Account", "Delete",
new { id = @ViewBag.Customer["customer-id"] }, null) ::
@Html.ActionLink("Customers Accounts", "Index")
</p>@{
ViewBag.Title = "New Customer Account";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">New Customer Account</h2>
@using (Html.BeginForm())
{
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Account #:</td>
<td>@Html.TextBox("AccountNumber")</td>
</tr>
<tr>
<td class="bold">Meter #:</td>
<td>
@Html.TextBox("MeterNumber", null,
htmlAttributes: new { id = "meterNumber" })
</td>
</tr>
<tr>
<td class="bold">Meter Details:</td>
<td><span id="meterDetails"></span></td>
</tr>
<tr>
<td class="bold">First Name:</td>
<td>@Html.TextBox("FirstName")</td>
</tr>
<tr>
<td class="bold">Last Name:</td>
<td>@Html.TextBox("LastName")</td>
</tr>
<tr>
<td class="bold">Address:</td>
<td>@Html.TextBox("Address")</td>
</tr>
<tr>
<td class="bold">City:</td>
<td>@Html.TextBox("City")</td>
</tr>
<tr>
<td class="bold">County:</td>
<td>@Html.TextBox("County")</td>
</tr>
<tr>
<td class="bold">State:</td>
<td>@Html.TextBox("State")</td>
</tr>
<tr>
<td class="bold">ZIP-Code:</td>
<td>@Html.TextBox("ZIPCode")</td>
</tr>
</table>
<hr />
<p class="text-center">
<a class="btn btn-warning" href="/Customers/Index">Customers Accounts</a>
<input type="submit" name="btnCreateCustomerAccount"
value="Create Customer Account" class="btn btn-warning" />
</p>
</div>
}
@Scripts.Render("~/bundles/jquery")
<script type="text/javascript">
$(document).ready(function () {
$("#meterNumber").blur(function (event) {
$.ajax({
method: "GET",
dataType: "xml",
url: "/GasDistribution/GasMeters.xml",
success: function (data) {
var gasMeters = $(data).find("gas-meter");
gasMeters.each(function () {
if ($(this).find("meter-number").text() === $("#meterNumber").val())
$("#meterDetails").text($(this).find("make").text() + " " + $(this).find("model").text());
}); // Each Gas Meter
} // Success
}); // Ajax
}); // Meter Number Lost Focus Event
}); // Document.Ready
</script>
Account #: 60-9720-824 Meter #: 293847-27 First Name: Jefferey Last Name: Parriot Address: 688 Gorman St City: Rockville County: Montgomery State: MD ZIP-Code: 20856
using System;
using System.Data;
using System.IO;
using System.Web.Mvc;
namespace GasUtilityCompany10.Controllers
{
public class GasBillsController : Controller
{
. . . No Change
// GET: GasBills/Details/5
public ActionResult Details(int id)
{
DataRow drGasBill = null;
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
foreach (DataRow drClient in dsGasBills.Tables[0].Rows)
{
if (int.Parse(drClient["gas-bill-id"].ToString()) == id)
{
drGasBill = drClient;
}
}
}
}
ViewBag.Invoice = drGasBill;
return View();
}
. . . No Change
}
}@{
ViewBag.Title = "Details";
Layout = "~/Views/Shared/_Arrangement.cshtml";
string pdd = DateTime.Parse(ViewBag.Invoice["payment-due-date"].ToString()).ToLongDateString();
string mred = DateTime.Parse(ViewBag.Invoice["meter-reading-end-date"].ToString()).ToLongDateString();
string mrsd = DateTime.Parse(ViewBag.Invoice["meter-reading-start-date"].ToString()).ToLongDateString();
}
<h2 class="text-center common-font bold">Gas Bill Details</h2>
<hr />
<div class="utility-container">
<table class="common-font">
<tr>
<td class="large bold">Gas Bill ID:</td>
<td>@ViewBag.Invoice["gas-bill-id"].ToString()</td>
</tr>
<tr>
<td class="bold">Account #:</td>
<td>@ViewBag.Invoice["account-number"].ToString()</td>
</tr>
<tr>
<td class="bold">Meter Reading Start Date:</td>
<td>@mrsd</td>
</tr>
<tr>
<td class="bold">Meter Reading End Date:</td>
<td>@mred</td>
</tr>
<tr>
<td class="bold">Billing Days:</td>
<td>@ViewBag.Invoice["billing-days"].ToString()</td>
</tr>
<tr>
<td class="bold">Counter Reading Start:</td>
<td>@ViewBag.Invoice["counter-reading-start"].ToString()</td>
</tr>
<tr>
<td class="bold">Counter Reading End:</td>
<td>@ViewBag.Invoice["counter-reading-end"].ToString()</td>
</tr>
<tr>
<td class="bold">Consumption:</td>
<td>@ViewBag.Invoice["consumption"].ToString()</td>
</tr>
<tr>
<td class="bold">Total Therms:</td>
<td>@ViewBag.Invoice["total-therms"].ToString()</td>
</tr>
<tr>
<td class="bold">Transportation Charges:</td>
<td>@ViewBag.Invoice["transportation-charges"].ToString()</td>
</tr>
<tr>
<td class="bold">First 50 Therms:</td>
<td>@ViewBag.Invoice["first-50-therms"].ToString()</td>
</tr>
<tr>
<td class="bold">Over 50 Therms:</td>
<td>@ViewBag.Invoice["over-50-therms"].ToString()</td>
</tr>
<tr>
<td class="bold">Delivery Total:</td>
<td>@ViewBag.Invoice["delivery-total"].ToString()</td>
</tr>
<tr>
<td class="bold">Distribution Adjustment:</td>
<td>@ViewBag.Invoice["distribution-adjustment"].ToString()</td>
</tr>
<tr>
<td class="bold">Environmental Charges:</td>
<td>@ViewBag.Invoice["environmental-charges"].ToString()</td>
</tr>
<tr>
<td class="bold">Total Charges:</td>
<td>@ViewBag.Invoice["total-charges"].ToString()</td>
</tr>
<tr>
<td class="bold">Local Taxes:</td>
<td>@ViewBag.Invoice["local-taxes"].ToString()</td>
</tr>
<tr>
<td class="bold">State Taxes:</td>
<td>@ViewBag.Invoice["state-taxes"].ToString()</td>
</tr>
<tr>
<td class="bold">Payment Due Date:</td>
<td>@pdd</td>
</tr>
<tr>
<td class="bold">Amount Due:</td>
<td>@ViewBag.Invoice["amount-due"].ToString()</td>
</tr>
<tr>
<td class="bold">Late Amount Due:</td>
<td>@ViewBag.Invoice["late-amount-due"].ToString()</td>
</tr>
</table>
</div>
<hr color="black" />
<p class="text-center">
@Html.ActionLink("Edit/Update Customer Gas Bill", "Edit",
new { id = @ViewBag.Invoice["gas-bill-id"] }, null) ::
@Html.ActionLink("Cancel this Gas Bill", "Delete",
new { id = @ViewBag.Invoice["gas-bill-id"] }, null) ::
@Html.ActionLink("Customers Gas Bills", "Index")
</p>using System;
using System.Data;
using System.IO;
using System.Web.Mvc;
namespace GasUtilityCompany10.Controllers
{
public class PaymentsController : Controller
{
No Change
// GET: Payments/Details/5
public ActionResult Details(int id)
{
DataRow drInvoice = null;
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
foreach (DataRow drPayment in dsPayments.Tables[0].Rows)
{
if (int.Parse(drPayment["payment-id"].ToString()) == id)
{
drInvoice = drPayment;
}
}
}
}
ViewBag.Payment = drInvoice;
return View();
}
. . . No Change
}
}@{
ViewBag.Title = "Payment Details";
Layout = "~/Views/Shared/_Arrangement.cshtml";
string pmtDate = DateTime.Parse(ViewBag.Payment["payment-date"].ToString()).ToLongDateString();
}
<h2 class="text-center common-font bold">Payment Details</h2>
<hr />
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Payment ID:</td>
<td>@ViewBag.Payment["payment-id"].ToString()</td>
</tr>
<tr>
<td class="bold">Payment Date:</td>
<td>@pmtDate</td>
</tr>
<tr>
<td class="bold">Gas Bill ID:</td>
<td>@ViewBag.Payment["gas-bill-id"].ToString()</td>
</tr>
<tr>
<td class="bold">Payment Amount:</td>
<td>@ViewBag.Payment["payment-amount"].ToString()</td>
</tr>
<tr>
<td class="bold">Payment Status:</td>
<td>@ViewBag.Payment["payment-status"].ToString()</td>
</tr>
</table>
</div>
<hr color="black" />
<p class="text-center">
@Html.ActionLink("Edit/Update Payment Details", "Edit",
new { id = @ViewBag.Payment["payment-id"] }, null) ::
@Html.ActionLink("Cancel tyhis Payment", "Delete",
new { id = @ViewBag.Payment["payment-id"] }, null) ::
@Html.ActionLink("Gas Bills Payments", "Index")
</p>The Status of a Record
When a change has been made to a record, a flag should indicate the type of change it has just received. This is referred to as the row state of a record. To support the flags, the System.Data namespace provides an enumeration named DataRowState. To apply this flag to a record, the DataRow class is equipped with a property named RowState.
Making Copies
Imagine you have a table in a data set and the table has the type of structure you want, including the values. You can copy the content of that table and replicate it into a table of your data set. To support this operation, the DataTable class is equipped with a method named Copy. Its syntax is:
public DataTable Copy();
In the same way, you can copy various tables from a data set and replicate them in your data set. If you want to copy all tables from an existing data set into your data set, you can call the Copy() method from the DataSet class. Its syntax is:
public DataSet Copy();
Here is an example:
@{
System.Xml.DataSet dsSchool = dsStudents.Copy();
}
Editing a Record
Consider the following list of records:
<!DOCTYPE html>
<html>
<head>
<title>Chemistry: Periodic Table</title>
</head>
<body>
<h1>Chemistry</h1>
<h2>Periodic Table</h2>
@{
System.Data.DataTable dtElements = new System.Data.DataTable("element");
dtElements.Columns.Add("atomic-number", Type.GetType("System.Int16"));
dtElements.Columns.Add("symbol", Type.GetType("System.String"));
dtElements.Columns.Add("element-name", Type.GetType("System.String"));
dtElements.Columns.Add("atomic-weight", Type.GetType("System.Single"));
System.Data.DataSet dsChemistry = new System.Data.DataSet("chemistry");
dsChemistry.Tables.Add(dtElements);
System.Data.DataRow drElement = dtElements.NewRow();
drElement[0] = 3;
drElement[1] = "Li";
drElement[2] = "Lithium";
drElement[3] = 6.938f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 1;
drElement[1] = "H";
drElement[2] = "Hydrogen";
drElement[3] = 1.008f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 4;
drElement[1] = "Be";
drElement[2] = "Beryllium";
drElement[3] = 9.0121831f;
dtElements.Rows.InsertAt(drElement, 500);
drElement = dtElements.NewRow();
drElement[0] = 5;
drElement[1] = "B";
drElement[2] = "Boron";
drElement[3] = 10.806f;
dtElements.Rows.InsertAt(drElement, 500);
drElement = dtElements.NewRow();
drElement[0] = 6;
drElement[1] = "Cb";
drElement[2] = "Corbone";
drElement[3] = 12.0096f;
dtElements.Rows.InsertAt(drElement, 500);
drElement = dtElements.NewRow(); drElement[0] = 2;
drElement[1] = "He";
drElement[2] = "Helium";
drElement[3] = 4.002602f;
dtElements.Rows.InsertAt(drElement, 1);
}
@{
int i = 0;
<table border="5">
<tr>
<td><b>Atomic #</b></td>
<td><b>Symbol</b></td>
<td><b>Element Name</b></td>
<td><b>Atomic Weight</b></td>
</tr>
@while (i < dtElements.Rows.Count)
{
drElement = dtElements.Rows[i];
<tr>
<td>@drElement[0]</td>
<td>@drElement[1]</td>
<td>@drElement[2]</td>
<td>@drElement[3]</td>
</tr>
i++;
}
</table>
}
</body>
</html>
This would produce:
As mentioned previously, editing a record consists of locating the record, identifying the value that needs to be changed and then changing it. You can perform this operation on one record at a time or on many records. If there are many records to be edited and you don't want a record to be used for anything else while that record is being updated, you can suspend the activities on that record while the updating operation is going on. Before a record is changed, its status is set to DataRowState.Unchanged value.
To let you signal that you are about to edit a record, the DataRow class is equipped with a method named BeginEdit. Its syntax is:
public void BeginEdit();
When this method is called, everything on the record is put on hold. After calling this method, you can perform the desired changes.
After performing the changes, to resume, you should call the EndEdit() method of the DataRow class. Its syntax is:
public void EndEdit();
Here is an example:
<!DOCTYPE html>
<html>
<head>
<title>Chemistry: Periodic Table</title>
</head>
<body>
<h1>Chemistry</h1>
<h2>Periodic Table</h2>
@{
System.Data.DataTable dtElements = new System.Data.DataTable("element");
dtElements.Columns.Add("atomic-number", Type.GetType("System.Int16"));
dtElements.Columns.Add("symbol", Type.GetType("System.String"));
dtElements.Columns.Add("element-name", Type.GetType("System.String"));
dtElements.Columns.Add("atomic-weight", Type.GetType("System.Single"));
System.Data.DataSet dsChemistry = new System.Data.DataSet("chemistry");
dsChemistry.Tables.Add(dtElements);
System.Data.DataRow drElement = dtElements.NewRow();
drElement[0] = 3;
drElement[1] = "Li";
drElement[2] = "Lithium";
drElement[3] = 6.938f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 1;
drElement[1] = "H";
drElement[2] = "Hydrogen";
drElement[3] = 1.008f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 4;
drElement[1] = "Be";
drElement[2] = "Beryllium";
drElement[3] = 9.0121831f;
dtElements.Rows.InsertAt(drElement, 500);
drElement = dtElements.NewRow();
drElement[0] = 5;
drElement[1] = "B";
drElement[2] = "Boron";
drElement[3] = 10.806f;
dtElements.Rows.InsertAt(drElement, 500);
drElement = dtElements.NewRow();
drElement[0] = 6;
drElement[1] = "Cb";
drElement[2] = "Corbone";
drElement[3] = 12.0096f;
dtElements.Rows.InsertAt(drElement, 500);
drElement = dtElements.NewRow(); drElement[0] = 2;
drElement[1] = "He";
drElement[2] = "Helium";
drElement[3] = 4.002602f;
dtElements.Rows.InsertAt(drElement, 1);
}
@{
// Edit the 6th record, whose index is 5
// Let the compiler know that you are starting to edit the record
dtElements.Rows[5].BeginEdit();
dtElements.Rows[5][1] = "C";
dtElements.Rows[5][2] = "Carbon";
dtElements.Rows[5].EndEdit();
int i = 0;
<table border="5">
<tr>
<td><b>Atomic #</b></td>
<td><b>Symbol</b></td>
<td><b>Element Name</b></td>
<td><b>Atomic Weight</b></td>
</tr>
@while (i < dtElements.Rows.Count)
{
drElement = dtElements.Rows[i];
<tr>
<td>@drElement[0]</td>
<td>@drElement[1]</td>
<td>@drElement[2]</td>
<td>@drElement[3]</td>
</tr>
i++;
}
</table>
}
</body>
</html>
This would produce:
Notice that the second record has values different than the original. While the changes are going on, if you find out that there is a problem and the record should not be updated, you can cancel the change. To support this, the DataRow class is equipped with a method named CancelEdit. Its syntax is:
public void CancelEdit();
When this method is called, the compiler would dismiss the current change that is being performed on the record.
When a record has been changed, the compiler changes its flag. In this case, it would be flagged as DataRowState.Modified. If you want to manually set this flag, you can call the SetModified() method of the DataRow class. Its syntax is:
public void SetModified();
This method should be called only if the record was previously set to DataRowState.Added or DataRowState.Unchanged.
Practical Learning: Editing a Record
using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class GasMetersController : Controller
{
. . . No Change
// GET: GasMeters/Edit/5
public ActionResult Edit(int id)
{
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasMeters.ReadXml(fsGasMeters);
foreach (DataRow drGasMeter in dsGasMeters.Tables[0].Rows)
{
if (int.Parse(drGasMeter["gas-meter-id"].ToString()) == id)
{
ViewBag.GasMeter = drGasMeter;
}
}
}
}
return View();
}
// POST: GasMeters/Edit/5
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
try
{
// TODO: Add update logic here
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasMeters.ReadXml(fsGasMeters);
}
}
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
foreach (DataRow drGasMeter in dsGasMeters.Tables[0].Rows)
{
if (int.Parse(drGasMeter["gas-meter-id"].ToString()) == id)
{
drGasMeter.BeginEdit();
drGasMeter["meter-number"] = collection["MeterNumber"];
drGasMeter["make"] = collection["Make"];
drGasMeter["model"] = collection["Model"];
drGasMeter["meter-reading-date"] = collection["MeterReadingDate"];
drGasMeter["counter-value"] = collection["CounterValue"];
drGasMeter.EndEdit();
dsGasMeters.WriteXml(fsGasMeters);
break;
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
. . . No Change
}
}
@{
ViewBag.Title = "Edit/Update Gas Meter";
Layout = "~/Views/Shared/_Arrangement.cshtml";
string make = ViewBag.GasMeter["make"].ToString();
string model = ViewBag.GasMeter["model"].ToString();
string mtrNumber = ViewBag.GasMeter["meter-number"].ToString();
string mtrReadDate = DateTime.Parse(ViewBag.GasMeter["meter-reading-date"].ToString()).ToShortDateString();
string counterValue = ViewBag.GasMeter["counter-value"].ToString();
}
<h2 class="text-center common-font bold">Edit/Update Gas Meter</h2>
<hr />
@using (Html.BeginForm())
{
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Meter #:</td>
<td>@Html.TextBox("MeterNumber", @mtrNumber)</td>
</tr>
<tr>
<td class="bold">Make:</td>
<td>@Html.TextBox("Make", @make)</td>
</tr>
<tr>
<td class="bold">Model:</td>
<td>@Html.TextBox("Model", @model)</td>
</tr>
<tr>
<td class="large bold">Meter Reading Date:</td>
<td> @Html.TextBox("MeterReadingDate", @mtrReadDate)</td>
</tr>
<tr>
<td class="bold">Counter Value:</td>
<td>@Html.TextBox("CounterValue", @counterValue)</td>
</tr>
</table>
<hr />
<p class="text-center">
@Html.ActionLink("Gas Meters", "Index") ::<a class="btn btn-warning" href="/GasMeters/Index">Gas Meters</a>
<input type="submit" name="btnUpdateGasMeter"
value="Update Gas Meter Information" class="btn btn-primary" />
</p>
</div>
}using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class CustomersController : Controller
{
. . . No Change
// GET: Customers/Edit/5
public ActionResult Edit(int id)
{
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsCustomers);
foreach (DataRow drCustomer in dsCustomers.Tables[0].Rows)
{
if (int.Parse(drCustomer["customer-id"].ToString()) == id)
{
ViewBag.Customer = drCustomer;
}
}
}
}
return View();
}
// POST: Customers/Edit/5
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
try
{
// TODO: Add update logic here
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsCustomers);
}
}
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
foreach (DataRow drCustomer in dsCustomers.Tables[0].Rows)
{
if (int.Parse(drCustomer["customer-id"].ToString()) == id)
{
drCustomer.BeginEdit();
drCustomer["account-number"] = collection["AccountNumber"];
drCustomer["meter-number"] = collection["MeterNumber"];
drCustomer["first-name"] = collection["FirstName"];
drCustomer["last-name"] = collection["LastName"];
drCustomer["address"] = collection["Address"];
drCustomer["city"] = collection["City"];
drCustomer["county"] = collection["County"];
drCustomer["state"] = collection["State"];
drCustomer["zip-code"] = collection["ZIPCode"];
drCustomer.EndEdit();
dsCustomers.WriteXml(fsCustomers);
break;
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
. . . No Change
}
}@{
ViewBag.Title = "Edit/Update Customer Account";
Layout = "~/Views/Shared/_Arrangement.cshtml";
string acntNbr = ViewBag.Customer["account-number"].ToString();
string mtrNbr = ViewBag.Customer["meter-number"].ToString();
string fname = ViewBag.Customer["first-name"].ToString();
string lname = ViewBag.Customer["last-name"].ToString();
string adrs = ViewBag.Customer["address"].ToString();
string city = ViewBag.Customer["city"].ToString();
string county = ViewBag.Customer["county"].ToString();
string state = ViewBag.Customer["state"].ToString();
string zip = ViewBag.Customer["zip-code"].ToString();
}
<h2 class="text-center common-font bold">Edit/Update Customer Account</h2>
<hr />
@using (Html.BeginForm())
{
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Account #:</td>
<td>@Html.TextBox("AccountNumber", @acntNbr)</td>
</tr>
<tr>
<td class="bold">Meter #:</td>
<td>@Html.TextBox("MeterNumber", @mtrNbr)</td>
</tr>
<tr>
<td class="bold">First Name:</td>
<td>@Html.TextBox("FirstName", @fname)</td>
</tr>
<tr>
<td class="bold">Last Name:</td>
<td>@Html.TextBox("LastName", @lname)</td>
</tr>
<tr>
<td class="bold">Address:</td>
<td>@Html.TextBox("Address", @adrs)</td>
</tr>
<tr>
<td class="bold">City:</td>
<td>@Html.TextBox("City", @city)</td>
</tr>
<tr>
<td class="bold">County:</td>
<td>@Html.TextBox("County", @county)</td>
</tr>
<tr>
<td class="bold">State:</td>
<td>@Html.TextBox("State", @state)</td>
</tr>
<tr>
<td class="bold">ZIP-Code:</td>
<td>@Html.TextBox("ZIPCode", @zip)</td>
</tr>
</table>
<hr />
<p class="text-center">
<a class="btn btn-warning" href="/Customers/Index">Customers Accounts</a>
<input type="submit" name="btnUpdateCustomerAccount"
value="Update Customer Account" class="btn btn-primary" />
</p>
</div>
}using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class GasBillsController : Controller
{
. . . No Change
// GET: GasBills/Create
public ActionResult Create()
{
return View();
}
// POST: GasBills/Create
[HttpPost]
public ActionResult Create(FormCollection collection)
{
try
{
// TODO: Add insert logic here
string meterNumber = string.Empty;
string accountNumber = string.Empty;
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (!string.IsNullOrEmpty(collection["AccountNumber"]))
{
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
}
}
DataRow drGasBill = dtGasBills.NewRow();
accountNumber = collection["AccountNumber"];
drGasBill["account-number"] = collection["AccountNumber"];
drGasBill["meter-reading-start-date"] = collection["MeterReadingStartDate"];
drGasBill["meter-reading-end-date"] = collection["MeterReadingEndDate"];
drGasBill["billing-days"] = collection["BillingDays"];
drGasBill["counter-reading-start"] = collection["CounterReadingStart"];
drGasBill["counter-reading-end"] = collection["CounterReadingEnd"];
drGasBill["consumption"] = collection["Consumption"];
drGasBill["total-therms"] = collection["TotalTherms"];
drGasBill["transportation-charges"] = collection["TransportationCharges"];
drGasBill["first-50-therms"] = collection["First50Therms"];
drGasBill["over-50-therms"] = collection["Over50Therms"];
drGasBill["delivery-total"] = collection["DeliveryTotal"];
drGasBill["distribution-adjustment"] = collection["DistributionAdjustment"];
drGasBill["environmental-charges"] = collection["EnvironmentalCharges"];
drGasBill["total-charges"] = collection["TotalCharges"];
drGasBill["local-taxes"] = collection["LocalTaxes"];
drGasBill["state-taxes"] = collection["StateTaxes"];
drGasBill["payment-due-date"] = collection["PaymentDueDate"];
drGasBill["amount-due"] = collection["AmountDue"];
drGasBill["late-amount-due"] = collection["LateAmountDue"];
dtGasBills.Rows.Add(drGasBill);
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write))
{
dsGasBills.WriteXml(fsGasBills);
}
CustomersController clientController = new CustomersController();
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsGasMeters = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
clientController.dsCustomers.ReadXml(fsGasMeters);
foreach (DataRow drClient in clientController.dsCustomers.Tables[0].Rows)
{
if (drClient["account-number"].ToString() == accountNumber)
{
meterNumber = drClient["meter-number"].ToString();
}
}
}
}
GasMetersController gmc = new GasMetersController();
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
gmc.dsGasMeters.ReadXml(fsGasMeters);
}
}
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
foreach (DataRow drGasMeter in gmc.dsGasMeters.Tables[0].Rows)
{
if (drGasMeter["meter-number"].ToString() == meterNumber)
{
drGasMeter.BeginEdit();
drGasMeter["meter-reading-date"] = collection["MeterReadingEndDate"];
drGasMeter["counter-value"] = collection["CounterReadingEnd"];
drGasMeter.EndEdit();
gmc.dsGasMeters.WriteXml(fsGasMeters);
break;
}
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
// GET: GasBills/Edit/5
public ActionResult Edit(int id)
{
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
foreach (DataRow drGasBill in dsGasBills.Tables[0].Rows)
{
if (int.Parse(drGasBill["gas-bill-id"].ToString()) == id)
{
ViewBag.GasBill = drGasBill;
}
}
}
}
return View();
}
// POST: GasBills/Edit/5
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
try
{
// TODO: Add update logic here
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
}
}
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
foreach (DataRow drGasBill in dsGasBills.Tables[0].Rows)
{
if (int.Parse(drGasBill["gas-bill-id"].ToString()) == id)
{
drGasBill.BeginEdit();
drGasBill["account-number"] = collection["AccountNumber"];
drGasBill["meter-reading-start-date"] = collection["MeterReadingStartDate"];
drGasBill["meter-reading-end-date"] = collection["MeterReadingEndDate"];
drGasBill["billing-days"] = collection["BillingDays"];
drGasBill["counter-reading-start"] = collection["CounterReadingStart"];
drGasBill["counter-reading-end"] = collection["CounterReadingEnd"];
drGasBill["consumption"] = collection["Consumption"];
drGasBill["total-therms"] = collection["TotalTherms"];
drGasBill["transportation-charges"] = collection["TransportationCharges"];
drGasBill["first-50-therms"] = collection["First50Therms"];
drGasBill["over-50-therms"] = collection["Over50Therms"];
drGasBill["delivery-total"] = collection["DeliveryTotal"];
drGasBill["distribution-adjustment"] = collection["DistributionAdjustment"];
drGasBill["environmental-charges"] = collection["EnvironmentalCharges"];
drGasBill["total-charges"] = collection["TotalCharges"];
drGasBill["local-taxes"] = collection["LocalTaxes"];
drGasBill["state-taxes"] = collection["StateTaxes"];
drGasBill["payment-due-date"] = collection["PaymentDueDate"];
drGasBill["amount-due"] = collection["AmountDue"];
drGasBill["late-amount-due"] = collection["LateAmountDue"];
drGasBill.EndEdit();
dsGasBills.WriteXml(fsGasBills);
break;
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
. . . No Change
}
}@{
ViewBag.Title = "Gas Bill Creation";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">Prepare Gas Bill</h2>
@using (Html.BeginForm())
{
<div>
<table class="common-font">
<tr>
<td class="large bold">Customer Account #:</td>
<td>@Html.TextBox("AccountNumber", null,
htmlAttributes: new { id = "accountNumber" })</td>
</tr>
<tr>
<td class="bold">Customer Name:</td>
<td><span id="customerName" class="sub-title"></span></td>
</tr>
<tr>
<td class="bold">Address:</td>
<td><span id="address" class="sub-title"></span></td>
</tr>
<tr>
<td class="bold">Gas Meter:</td>
<td><span id="gasMeterNbr" class="sub-title"></span>
<span id="gasMeterDetails" class="sub-title"></span></td>
</tr>
</table>
<table class="common-font">
<tr>
<td class="large bold">Meter Reading Start Date:</td>
<td>@Html.TextBox("MeterReadingStartDate", null,
htmlAttributes: new { id = "mrsd" })</td>
<td class="bold">Reading End Date:</td>
<td>@Html.TextBox("MeterReadingEndDate", null,
htmlAttributes: new { type = "date", id = "mred" })</td>
<td class="bold">Billing Days:</td>
<td>@Html.TextBox("BillingDays", null,
htmlAttributes: new { @class = "small", id = "days" })</td>
</tr>
<tr>
<td class="bold">Counter Reading Start:</td>
<td>@Html.TextBox("CounterReadingStart", null,
htmlAttributes: new { id = "crs" })</td>
<td class="bold">Current Meter Reading:</td>
<td>@Html.TextBox("CounterReadingEnd", null,
htmlAttributes: new { id = "cre" })</td>
<td class="bold">Consumption:</td>
<td>@Html.TextBox("Consumption", null,
htmlAttributes: new { @class = "small", id = "consumption" })</td>
</tr>
</table>
<hr />
<table class="common-font">
<tr>
<td class="large bold">Total Therms:</td>
<td>@Html.TextBox("TotalTherms", null,
htmlAttributes: new { id = "totalTherms" })</td>
<td class="bold">First 50 Therms:</td>
<td>@Html.TextBox("First50Therms", null,
htmlAttributes: new { id = "first50Therms" })</td>
<td class="bold">Over 50 Therms:</td>
<td>@Html.TextBox("Over50Therms", null,
htmlAttributes: new { @class = "small", id = "over50Therms" })</td>
</tr>
<tr>
<td class="bold">Delivery Total:</td>
<td>@Html.TextBox("DeliveryTotal", null,
htmlAttributes: new { id = "deliveryTotal" })</td>
<td class="bold">Distribution Adjustment:</td>
<td>@Html.TextBox("DistributionAdjustment", null,
htmlAttributes: new { id = "distributionAdjustment" })</td>
<td class="bold">Environmental Charges:</td>
<td>@Html.TextBox("EnvironmentalCharges", null,
htmlAttributes: new { @class = "small", id = "environmentalCharges" })</td>
</tr>
<tr>
<td colspan="6"><hr /></td>
</tr>
<tr>
<td> </td>
<td> </td>
<td class="bold">Transportation Charges:</td>
<td>@Html.TextBox("transportationCharges", null,
htmlAttributes: new { id = "transportation" })</td>
<td class="bold">Total Charges:</td>
<td>@Html.TextBox("TotalCharges", null,
htmlAttributes: new { @class = "small", id = "totalCharges" })</td>
</tr>
<tr>
<td> </td>
<td> </td>
<td class="bold">Local Taxes:</td>
<td>@Html.TextBox("LocalTaxes", null,
htmlAttributes: new { id = "localTaxes" })</td>
<td class="bold">State Taxes:</td>
<td>@Html.TextBox("StateTaxes", null,
htmlAttributes: new { @class = "small", id = "stateTaxes" })</td>
</tr>
<tr>
<td class="bold">Payment Due Date:</td>
<td>@Html.TextBox("PaymentDueDate", null,
htmlAttributes: new { type = "date" })</td>
<td class="bold">Amount Due:</td>
<td>@Html.TextBox("AmountDue", null,
htmlAttributes: new { id = "amtDue" })</td>
<td class="bold">Late Amount Due:</td>
<td>@Html.TextBox("LateAmountDue", null,
htmlAttributes: new { @class = "small", id = "lad" })</td>
</tr>
</table>
<hr />
<p class="text-center"><input type="submit" name="btnCreateGasBill"
value="Generate Customer Gas Bill" class="btn btn-warning" /></p>
</div>
}
@Scripts.Render("~/bundles/jquery")
<script type="text/javascript">
$(document).ready(function () {
var mtrNbr = "";
$("#transportation").val(10.55);
/* After the user has entered a customer account number and
* press Tab (or clicks somewhere else), ... */
$("#accountNumber").blur(function (event) {
/* ... we will check the customer account ... */
$.ajax({
method: "GET",
dataType: "xml",
url: "/GasDistribution/Customers.xml",
success: function (data) {
var customers = $(data).find("customer");
customers.each(function () {
if ($(this).find("account-number").text() === $("#accountNumber").val()) {
/* and get the necessary values of the record to display in the form. */
$("#customerName").text($(this).find("first-name").text() + " " + $(this).find("last-name").text());
$("#address").text($(this).find("address").text() + " " + $(this).find("city").text() + ", " + $(this).find("state").text());
$("#gasMeterNbr").text($(this).find("meter-number").text());
// We will also get the meter number allocated to the customer
mtrNbr = $(this).find("meter-number").text();
}
}); // Each Customer
} // Success
}); // Ajax Customers
// Based on the meter number of the customer, we can locate the gas meter, ...
$.ajax({
method: "GET",
dataType: "xml",
url: "/GasDistribution/GasMeters.xml",
success: function (data) {
var gasMeters = $(data).find("gas-meter");
gasMeters.each(function () {
if ($(this).find("meter-number").text() === mtrNbr) {
// ... and display its details
$("#gasMeterDetails").text($(this).find("make").text() + " " + $(this).find("model").text());
/* In case this is the first gas bill for the customer, get the previous
* counter reading number from the gas meter record */
$("#crs").val($(this).find("counter-value").text());
// In the same way, get the previous meter reading date from the gas meter record
$("#mrsd").val($(this).find("meter-reading-date").text());
}
}); // Each Gas Meter
} // Success
}); // Ajax
/* If this is not the customer's first bill, this means that the previous
* counter reading and date are stored in the file for gas bills. */
$.ajax({
method: "GET",
dataType: "xml",
url: "/GasDistribution/GasBills.xml",
success: function (data) {
// Get the gas bills from the file
var gasBills = $(data).find("gas-bill");
// Check each gas bill
gasBills.each(function () {
// If you find a record that has the same account number as the one the user had typed, ...
if ($(this).find("account-number").text() === $("#accountNumber").val()) {
// get the record's Meter Reading Start Date value as the previous meter reading date
$("#mrsd").val($(this).find("meter-reading-end-date").text());
/* and its Counter Reading End value as the Counter Reading Start value, ... */
$("#crs").val($(this).find("counter-reading-end").text());
}
}); // Each Gas Bill
} // Success
}); // Ajax
}); // Lost Focus Event
$("#mred").on("blur", function (event) {
var startDate = new Date($("#mrsd").val()).getTime();
var endDate = new Date($("#mred").val()).getTime();
var days = Math.ceil((endDate - startDate) / (1000 * 60 * 60 * 24));
$("#days").val(days);
});
$("#cre").on("blur", function (event) {
var first50Therms = 0, over50Therms = 0;
var readingStart = parseInt($("#crs").val());
var readingEnd = parseInt($("#cre").val());
var difference = readingEnd - readingStart;
var totalTherms = difference * 1.0367;
if (totalTherms < 50) {
first50Therms = totalTherms * 0.5269;
over50Therms = 0;
} else {
first50Therms = 50 * 0.5269;
over50Therms = (totalTherms - 50) * 0.4995;
}
var transportation = parseInt($("#transportation").val());
var deliveryTotal = transportation + first50Therms + over50Therms;
var distribution = totalTherms * 0.11086;
var environment = deliveryTotal * 0.0045;
var totalCharges = transportation + deliveryTotal + distribution + environment;
var local = totalCharges * 0.05826;
var state = totalCharges * 0.0225;
var amtDue = totalCharges + local + state;
$("#consumption").val(difference.toFixed());
$("#totalTherms").val(totalTherms.toFixed(2));
$("#first50Therms").val(first50Therms.toFixed(2));
$("#over50Therms").val(over50Therms.toFixed(2));
$("#deliveryTotal").val(deliveryTotal.toFixed(2));
$("#distributionAdjustment").val(distribution.toFixed(2));
$("#environmentalCharges").val(environment.toFixed(2));
$("#totalCharges").val(totalCharges.toFixed(2));
$("#localTaxes").val(local.toFixed(2));
$("#stateTaxes").val(state.toFixed(2));
$("#amtDue").val(amtDue.toFixed(2));
$("#lad").val((amtDue + 8.75).toFixed(2));
});
}); // Document.Ready
</script>@{
ViewBag.Title = "Edit/Update Gas Bill";
Layout = "~/Views/Shared/_Arrangement.cshtml";
string mrsd = DateTime.Parse(ViewBag.GasBill["meter-reading-start-date"].ToString()).ToShortDateString();
string mred = DateTime.Parse(ViewBag.GasBill["meter-reading-end-date"].ToString()).ToShortDateString();
string days = ViewBag.GasBill["billing-days"].ToString();
string crs = ViewBag.GasBill["counter-reading-start"].ToString();
string cre = ViewBag.GasBill["counter-reading-end"].ToString();
string totalTherms = ViewBag.GasBill["total-therms"].ToString();
string consumption = ViewBag.GasBill["consumption"].ToString();
string transportation = ViewBag.GasBill["transportation-charges"].ToString();
string first50Therms = ViewBag.GasBill["first-50-therms"].ToString();
string over50Therms = ViewBag.GasBill["over-50-therms"].ToString();
string delivery = ViewBag.GasBill["delivery-total"].ToString();
string distribution = ViewBag.GasBill["distribution-adjustment"].ToString();
string environment = ViewBag.GasBill["environmental-charges"].ToString();
string totalCharges = ViewBag.GasBill["total-charges"].ToString();
string localTaxes = ViewBag.GasBill["local-taxes"].ToString();
string stateTaxes = ViewBag.GasBill["state-taxes"].ToString();
string pdd = DateTime.Parse(ViewBag.GasBill["payment-due-date"].ToString()).ToShortDateString();
string amtDue = ViewBag.GasBill["amount-due"].ToString();
string lad = ViewBag.GasBill["late-amount-due"].ToString();
}
<h2 class="text-center common-font bold">Edit/Update Gas Bill</h2>
<hr />
@using (Html.BeginForm())
{
<div>
<table class="common-font">
<tr>
<td class="large bold">Customer Account #:</td>
<td>@Html.TextBox("AccountNumber", @ViewBag.GasBill["account-number"] as string,
htmlAttributes: new { id = "accountNumber" })</td>
</tr>
<tr>
<td class="bold">Customer Name:</td>
<td><span id="customerName" class="sub-title"></span></td>
</tr>
<tr>
<td class="bold">Address:</td>
<td><span id="address" class="sub-title"></span></td>
</tr>
<tr>
<td class="bold">Gas Meter:</td>
<td>
<span id="gasMeterNbr" class="sub-title"></span>
<span id="gasMeterDetails" class="sub-title"></span>
</td>
</tr>
</table>
<table class="common-font">
<tr>
<td class="large bold">Meter Reading Start Date:</td>
<td>@Html.TextBox("MeterReadingStartDate", @mrsd,
htmlAttributes: new { id = "mrsd" })</td>
<td class="bold">Reading End Date:</td>
<td>@Html.TextBox("MeterReadingEndDate", @mred,
htmlAttributes: new { id = "mred" })</td>
<td class="bold">Billing Days:</td>
<td>@Html.TextBox("BillingDays", @days,
htmlAttributes: new { @class = "small", id = "days" })</td>
</tr>
<tr>
<td class="bold">Counter Reading Start:</td>
<td>@Html.TextBox("CounterReadingStart", @crs,
htmlAttributes: new { id = "crs" })</td>
<td class="bold">Current Meter Reading:</td>
<td>@Html.TextBox("CounterReadingEnd", @cre,
htmlAttributes: new { id = "cre" })</td>
<td class="bold">Consumption:</td>
<td>@Html.TextBox("Consumption", @consumption,
htmlAttributes: new { @class = "small", id = "consumption" })</td>
</tr>
</table>
<hr />
<table class="common-font">
<tr>
<td class="large bold">Total Therms:</td>
<td>@Html.TextBox("TotalTherms", @totalTherms,
htmlAttributes: new { id = "totalTherms" })</td>
<td class="bold">First 50 Therms:</td>
<td>@Html.TextBox("First50Therms", @first50Therms,
htmlAttributes: new { id = "first50Therms" })</td>
<td class="bold">Over 50 Therms:</td>
<td>@Html.TextBox("Over50Therms", @over50Therms,
htmlAttributes: new { @class = "small", id = "over50Therms" })</td>
</tr>
<tr>
<td class="bold">Delivery Total:</td>
<td>@Html.TextBox("DeliveryTotal", @delivery,
htmlAttributes: new { id = "deliveryTotal" })</td>
<td class="bold">Distribution Adjustment:</td>
<td>@Html.TextBox("DistributionAdjustment", @distribution,
htmlAttributes: new { id = "distribution" })</td>
<td class="bold">Environmental Charges:</td>
<td>@Html.TextBox("EnvironmentalCharges", @environment,
htmlAttributes: new { @class = "small", id = "environment" })</td>
</tr>
<tr>
<td colspan="6"><hr /></td>
</tr>
<tr>
<td> </td>
<td> </td>
<td class="bold">Transportation Charges:</td>
<td>@Html.TextBox("transportationCharges", @transportation,
htmlAttributes: new { id = "transportation" })</td>
<td class="bold">Total Charges:</td>
<td>@Html.TextBox("TotalCharges", @totalCharges,
htmlAttributes: new { @class = "small", id = "totalCharges" })</td>
</tr>
<tr>
<td> </td>
<td> </td>
<td class="bold">Local Taxes:</td>
<td>@Html.TextBox("LocalTaxes", @localTaxes,
htmlAttributes: new { id = "localTaxes" })</td>
<td class="bold">State Taxes:</td>
<td>@Html.TextBox("StateTaxes", @stateTaxes,
htmlAttributes: new { @class = "small", id = "stateTaxes" })</td>
</tr>
<tr>
<td class="bold">Payment Due Date:</td>
<td>@Html.TextBox("PaymentDueDate", @pdd,
htmlAttributes: new { id = "pdd" })</td>
<td class="bold">Amount Due:</td>
<td>@Html.TextBox("AmountDue", @amtDue,
htmlAttributes: new { id = "amtDue" })</td>
<td class="bold">Late Amount Due:</td>
<td>@Html.TextBox("LateAmountDue", @lad,
htmlAttributes: new { @class = "small", id = "lad" })</td>
</tr>
</table>
<hr />
<p class="text-center">
@Html.ActionLink("Gas Bills", "Index") ::
<input type="submit" name="btnUpdateGasBill"
value="Update Gas Bill" class="btn btn-primary" />
</p>
</div>
}
@Scripts.Render("~/bundles/jquery")
<script type="text/javascript">
$(document).ready(function () {
var mtrNbr = "";
function getCustomer() {
$.ajax({
method: "GET",
dataType: "xml",
url: "/GasDistribution/Customers.xml",
success: function (data) {
var customers = $(data).find("customer");
customers.each(function () {
if ($(this).find("account-number").text() === $("#accountNumber").val()) {
$("#customerName").text($(this).find("first-name").text() + " " + $(this).find("last-name").text());
$("#address").text($(this).find("address").text() + " " + $(this).find("city").text() + ", " + $(this).find("state").text());
$("#gasMeterNbr").text($(this).find("meter-number").text());
mtrNbr = $(this).find("meter-number").text();
}
}); // Each Customer
} // Success
}); // Ajax Customers
$.ajax({
method: "GET",
dataType: "xml",
url: "/GasDistribution/GasMeters.xml",
success: function (data) {
var gasMeters = $(data).find("gas-meter");
gasMeters.each(function () {
if ($(this).find("meter-number").text() === mtrNbr) {
$("#gasMeterDetails").text($(this).find("make").text() + " " + $(this).find("model").text());
}
}); // Each Gas Meter
} // Success
}); // Ajax
}
getCustomer();
$("#accountNumber").blur(function (event) {
getCustomer();
}); // Lost Focus Event
$("#mred").on("blur", function (event) {
var startDate = new Date($("#mrsd").val()).getTime();
var endDate = new Date($("#mred").val()).getTime();
var days = Math.ceil((endDate - startDate) / (1000 * 60 * 60 * 24));
$("#days").val(days);
});
$("#cre").on("blur", function (event) {
var first50Therms = 0, over50Therms = 0;
var readingStart = parseInt($("#crs").val());
var readingEnd = parseInt($("#cre").val());
var difference = readingEnd - readingStart;
var totalTherms = difference * 1.0367;
if (totalTherms < 50) {
first50Therms = totalTherms * 0.5269;
over50Therms = 0;
} else {
first50Therms = 50 * 0.5269;
over50Therms = (totalTherms - 50) * 0.4995;
}
var transportation = parseInt($("#transportation").val());
var deliveryTotal = transportation + first50Therms + over50Therms;
var distribution = totalTherms * 0.11086;
var environment = deliveryTotal * 0.0045;
var totalCharges = transportation + deliveryTotal + distribution + environment;
var local = totalCharges * 0.05826;
var state = totalCharges * 0.0225;
var amtDue = totalCharges + local + state;
$("#consumption").val(difference.toFixed(2));
$("#totalTherms").val(totalTherms.toFixed(2));
$("#first50Therms").val(first50Therms.toFixed(2));
$("#over50Therms").val(over50Therms.toFixed(2));
$("#deliveryTotal").val(deliveryTotal.toFixed(2));
$("#distributionAdjustment").val(distribution.toFixed(2));
$("#environmentalCharges").val(environment.toFixed(2));
$("#totalCharges").val(totalCharges.toFixed(2));
$("#localTaxes").val(local.toFixed(2));
$("#stateTaxes").val(state.toFixed(2));
$("#amtDue").val(amtDue.toFixed(2));
$("#lad").val((amtDue + 8.75).toFixed(2));
});
}); // Document.Ready
</script>using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class PaymentsController : Controller
{
. . . No Change
// GET: Payments/Edit/5
public ActionResult Edit(int id)
{
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
foreach (DataRow drPayment in dsPayments.Tables[0].Rows)
{
if (int.Parse(drPayment["payment-id"].ToString()) == id)
{
ViewBag.Payment = drPayment;
}
}
}
}
return View();
}
// POST: Payments/Edit/5
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
try
{
// TODO: Add update logic here
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
}
}
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Truncate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
foreach (DataRow drPayment in dsPayments.Tables[0].Rows)
{
if (int.Parse(drPayment["payment-id"].ToString()) == id)
{
drPayment.BeginEdit();
drPayment["payment-date"] = collection["PaymentDate"];
drPayment["gas-bill-id"] = collection["GasBillID"];
drPayment["payment-amount"] = collection["PaymentAmount"];
drPayment["payment-status"] = collection["PaymentStatus"];
drPayment.EndEdit();
dsPayments.WriteXml(fsPayments);
break;
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
. . . No Change
}
}@{
ViewBag.Title = "Edit/Update Bill Payment";
Layout = "~/Views/Shared/_Arrangement.cshtml";
string billNbr = ViewBag.Payment["gas-bill-id"].ToString();
string status = ViewBag.Payment["payment-status"].ToString();
string amt = ViewBag.Payment["payment-amount"].ToString();
string pmtDate = DateTime.Parse(ViewBag.Payment["payment-date"].ToString()).ToShortDateString();
System.Collections.Generic.List<SelectListItem> categories = new List<SelectListItem>();
categories.Add(new SelectListItem { Text = "On Time", Value = "On Time", Selected = (status == "On Time") });
categories.Add(new SelectListItem { Text = "Late Payment", Value = "Late Payment", Selected = (status == "Late Payment") });
}
<h2 class="text-center common-font bold">Edit/Update Bill Payment</h2>
<hr />
@using (Html.BeginForm())
{
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Payment Date:</td>
<td>@Html.TextBox("PaymentDate", @pmtDate)</td>
</tr>
<tr>
<td class="bold">Gas Bill ID:</td>
<td>@Html.TextBox("GasBillID", @billNbr)</td>
</tr>
<tr>
<td class="bold">Payment Amount:</td>
<td>@Html.TextBox("PaymentAmount", @amt)</td>
</tr>
<tr>
<td class="large bold">Payment Status:</td>
<td>@Html.DropDownList("PaymentStatus", @categories, htmlAttributes: new { value = "" })</td>
</tr>
</table>
<hr />
<p class="text-center">
<a href="/Payments/Index" class="btn btn-warning">Gas Bills Payments</a>
<input type="submit" name="btnUpdateBillPayment"
value="Update Gas Bill Payment" class="btn btn-warning" />
</p>
</div>
}@{
ViewBag.Title = "GUC Home";
}
<div class="jumbotron">
<h1>Your Gas Needs With Us</h1>
<p class="lead">The Gas Utility Company (GUC) serves the whole Metropolitan
area and its vicinity. The company serves both residential and business
needs in terms of natural gas.</p>
</div>
<div class="row">
<div class="col-md-4">
<h2>Employees</h2>
<p>Employees should log in to review their
time sheet and benefits.</p>
@Html.ActionLink("Employees Portal", "Index", "Employees")
</div>
<div class="col-md-4">
<h2>Customers</h2>
<p>To review or pay your bills, first log in, or create an account.</p>
@Html.ActionLink("Customers Topics", "Index", "Customers")
</div>
<div class="col-md-4">
<h2>Gas Meters</h2>
<p>This section provides much information about our gas
meters.</p>
@Html.ActionLink("Gas Meters", "Index", "GasMeters")
</div>
</div>
Make: Archimeda Counter Value: 2866
| Account # | Meter # | First Name | Last Name | Address | City | County | State | ZIP-Code |
| 82-1397-851 | 425837-14 | Christopher | Mack Gillan | 3316 Sanderson Rd | Alexandria | VA | ||
| 82-9360-597 | 582741-38 | Sandra | Rhodes | 11158 Grattos Ave | Hyattsville | Prince George | MD | 20783 |
| 29-5384-805 | 928731-59 | Marco | Ramos | 9012 Jefferson Crt | Washington | DC | 20012 | |
| 92-3848-393 | 797047-27 | Gabrielle | Bayley | 799 Boomerang Str | Columbia | Howard | MD |
| Account # | Reading End Date | Counter Reading End | Payment Due Date |
| 60-9720-824 | 2/20/2018 | 3024 | 03/17/2018 |
| 82-9360-597 | 2/22/2018 | 165 | 03/19/2018 |
| 92-3848-393 | 2/25/2018 | 997 | 3/22/2018 |
| 29-5384-805 | 2/28/2018 | 8418 | 3/25/2018 |
| 60-9720-824 | 3/15/2018 | 3195 | 4/9/2018 |
| 92-3848-393 | 3/24/2018 | 1229 | 4/18/2018 |
| 82-1397-851 | 3/22/2018 | 6156 | 4/16/2018 |
| 29-5384-805 | 3/31/2018 | 8808 | 4/25/2018 |
| 82-1397-851 | 4/19/2018 | 6288 | 5/24/2018 |
| 60-9720-824 | 4/20/2018 | 3407 | 5/15/2018 |
| 82-1397-851 | 5/21/2018 | 6338 | 06-15-2018 |
| Gas Bill # | Payment Date | Payment Amount | Payment Status |
| 1 | 3/5/2018 | 131.60 | On Time |
| 3 | 3/6/2018 | 209.85 | On Time |
| 2 | 3/30/2018 | 49.78 | Late Payment |
| 6 | 4/1/2018 | 182.39 | On Time |
| 4 | 4/2/2018 | 307.83 | Late Payment |
| 5 | 4/5/2018 | 140.52 | On Time |
| 8 | 4/15/2018 | 290.84 | On Time |
| 7 | 4/30/2018 | 60.54 | Late Payment |
Accepting Record Changes
The operations you perform on records, such as adding a new record, adding a series of records, deleting a record, deleting a group or records, or deleting all records, are referred to as changes. After preparing a change but before committing it, if you know the change is right, you can ask the compiler to accept it. To support this, the DataRow class is equipped with a method named AcceptChanges. Its syntax is:
public void AcceptChanges()
This method allows you to ask the compiler to validate the changes that are about to be made on a record. Here is an example:
<!DOCTYPE html>
<html>
<head>
<title>Chemistry: Periodic Table</title>
</head>
<body>
<h1>Chemistry</h1>
<h2>Periodic Table</h2>
@{
System.Data.DataTable dtElements = new System.Data.DataTable("element");
dtElements.Columns.Add("atomic-number", Type.GetType("System.Int16"));
dtElements.Columns.Add("symbol", Type.GetType("System.String"));
dtElements.Columns.Add("element-name", Type.GetType("System.String"));
dtElements.Columns.Add("atomic-weight", Type.GetType("System.Single"));
System.Data.DataSet dsChemistry = new System.Data.DataSet("chemistry");
dsChemistry.Tables.Add(dtElements);
System.Data.DataRow drElement = dtElements.NewRow();
drElement[0] = 21;
drElement[1] = "Sc";
drElement[2] = "Scandium";
drElement[3] = 44.955908f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 22;
drElement[1] = "Ti";
drElement[2] = "Titanium";
drElement[3] = 47.867f;
dtElements.Rows.InsertAt(drElement, 1);
drElement = dtElements.NewRow();
drElement[0] = 23;
drElement[1] = "V";
drElement[2] = "Vanadium";
drElement[3] = 50.9415f;
dtElements.Rows.InsertAt(drElement, 2);
dtElements.Rows[1].AcceptChanges();
}
@{
int i = 0;
<table border="5">
<tr>
<td><b>Atomic #</b></td>
<td><b>Symbol</b></td>
<td><b>Element Name</b></td>
<td><b>Atomic Weight</b></td>
</tr>
@while (i < dtElements.Rows.Count)
{
drElement = dtElements.Rows[i];
<tr>
<td>@drElement[0]</td>
<td>@drElement[1]</td>
<td>@drElement[2]</td>
<td>@drElement[3]</td>
</tr>
i++;
}
</table>
}
</body>
</html>
Rejecting Record Changes
On the other hand, if you find out that the change that is about to occur on a record should not be validated, you can cancel it. To support this, the DataRow class is equipped with a method named RejectChanges. Its syntax is:
public void RejectChanges();
Here is an example:
<!DOCTYPE html>
<html>
<head>
<title>Chemistry: Periodic Table</title>
</head>
<body>
<h1>Chemistry</h1>
<h2>Periodic Table</h2>
@{
System.Data.DataTable dtElements = new System.Data.DataTable("element");
dtElements.Columns.Add("atomic-number", Type.GetType("System.Int16"));
dtElements.Columns.Add("symbol", Type.GetType("System.String"));
dtElements.Columns.Add("element-name", Type.GetType("System.String"));
dtElements.Columns.Add("atomic-weight", Type.GetType("System.Single"));
System.Data.DataSet dsChemistry = new System.Data.DataSet("chemistry");
dsChemistry.Tables.Add(dtElements);
System.Data.DataRow drElement = dtElements.NewRow();
drElement[0] = 21;
drElement[1] = "Sc";
drElement[2] = "Scandium";
drElement[3] = 44.955908f;
dtElements.Rows.InsertAt(drElement, 0);
drElement = dtElements.NewRow();
drElement[0] = 22;
drElement[1] = "Ti";
drElement[2] = "Titanium";
drElement[3] = 47.867f;
dtElements.Rows.InsertAt(drElement, 1);
dtElements.Rows[1].RejectChanges();
drElement = dtElements.NewRow();
drElement[0] = 23;
drElement[1] = "V";
drElement[2] = "Vanadium";
drElement[3] = 50.9415f;
dtElements.Rows.InsertAt(drElement, 2);
dtElements.Rows[1].AcceptChanges();
}
@{
int i = 0;
<table border="5">
<tr>
<td><b>Atomic #</b></td>
<td><b>Symbol</b></td>
<td><b>Element Name</b></td>
<td><b>Atomic Weight</b></td>
</tr>
@while (i < dtElements.Rows.Count)
{
drElement = dtElements.Rows[i];
<tr>
<td>@drElement[0]</td>
<td>@drElement[1]</td>
<td>@drElement[2]</td>
<td>@drElement[3]</td>
</tr>
i++;
}
</table>
}
</body>
</html>
This would produce:
Notice that, although 4 records were created, one was rejected. After editing a record and indicating that you have accepted the changes, the record's status can receive a new status such as DataRowState.Added or DataRowState.Modified. This means that you can then call either the DataRow.SetAdded() or the DataRow.Setmodified() method.
The Nullity of a Value
As we know already, a record can contain one or more values. Each value is identified by the column to which it belongs. A column is said to be null if it does not have a value. To let you find out whether the value of a column is null, the DataRow class is equipped with a method named IsNull method. It comes in various versions. To specify the column whose value you want to check, you can pass the object name, the index, or the variable name of the column as argument.
Deleting Records
Deleting the Current Row
If you have a record you don't need, you can remove it from your table. To support the ability to remove a record, the DataRow class is equipped with a method named Delete. Its syntax is:
public void Delete();
To programmatically delete a record, first locate it by its index, get a DataRow reference to the record to be removed, and then call the Delete() method on it. Once again, you would need a way to uniquely identify a record.
Removing a Row From a Collection of Records
Besides the DataRow class, the DataRowCollection class provides its own means of deleting a record from a table. To delete a record, you can call the DataRowCollection.Remove() method. Its syntax is:
public void Remove(DataRow row);
This method takes as argument a DataRow object and checks whether the table contains it. If that record exists, it gets deleted, including all of its entries for each column.
Practical Learning: Deleting a Record
using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class GasMetersController : Controller
{
private readonly DataColumn dcMake;
private readonly DataColumn dcModel;
private readonly DataColumn dcGasMeterID;
private readonly DataColumn dcMeterNumber;
private readonly DataColumn dcCounterValue;
private readonly DataColumn dcMeterReadingDate;
public DataTable dtGasMeters;
public DataSet dsGasMeters;
public GasMetersController()
{
dcGasMeterID = new DataColumn("gas-meter-id");
dcGasMeterID.AutoIncrement = true;
dcGasMeterID.AutoIncrementSeed = 1;
dcGasMeterID.AutoIncrementStep = 1;
dcMeterNumber = new DataColumn("meter-number");
dcMeterNumber.Unique = true;
dcMeterNumber.DataType = Type.GetType("System.String");
dcMake = new DataColumn("make");
dcMake.DataType = Type.GetType("System.String");
dcModel = new DataColumn("model");
dcModel.DataType = Type.GetType("System.String");
dcMeterReadingDate = new DataColumn("meter-reading-date", Type.GetType("System.DateTime"));
dcCounterValue = new DataColumn("counter-value");
dcCounterValue.DataType = Type.GetType("System.Int32");
dtGasMeters = new DataTable("gas-meter");
dtGasMeters.Columns.Add(dcGasMeterID);
dtGasMeters.Columns.Add(dcMeterNumber);
dtGasMeters.Columns.Add(dcMake);
dtGasMeters.Columns.Add(dcModel);
dtGasMeters.Columns.Add(dcMeterReadingDate);
dtGasMeters.Columns.Add(dcCounterValue);
// dtGasMeters.PrimaryKey = new DataColumn[] { dtGasMeters.Columns["gas-meter-id"] };
dsGasMeters = new DataSet("gas-meters");
dsGasMeters.Tables.Add(dtGasMeters);
}
// GET: GasMeters
public ActionResult Index()
{
// We will store our files in a custom folder named GasDistribution.
// The records for gas meters are stored in an XML file named GasMeters.xml.
// Get a reference to the file that contains records.
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
// Check whether a file for gas meters was previously created.
if (System.IO.File.Exists(strGasMetersFile))
{
// If the file exists already, open it ...
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
// ... and store the records in the appropriate data set
dsGasMeters.ReadXml(fsGasMeters);
}
}
// Prepare to use the list of records in a webpage.
ViewBag.GasMeters = dsGasMeters.Tables[0].Rows;
return View();
}
// GET: GasMeters/Details/5
public ActionResult Details(int id)
{
// DataRow drCustomerMeter = null;
DataRow drCustomerMeter = null;
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
// Open the list of records and store them in a data set
dsGasMeters.ReadXml(fsGasMeters);
// Check each record
foreach (DataRow drGasMeter in dsGasMeters.Tables[0].Rows)
{
// Look for a Gas Meter ID that has the same value as the argument to the current method
if (int.Parse(drGasMeter["gas-meter-id"].ToString()) == id)
{
// If you find such a record, get its reference
drCustomerMeter = drGasMeter;
}
}
}
}
// Send the record to the view
ViewBag.GasMeter = drCustomerMeter;
/* string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasMeters.ReadXml(fsGasMeters);
foreach (DataRow drGasMeter in dsGasMeters.Tables[0].Rows)
{
if (int.Parse(drGasMeter["gas-meter-id"].ToString()) == id)
{
drCustomerMeter = drGasMeter;
}
}
}
}
ViewBag.GasMeter = dsGasMeters.Tables[0].Rows.Find(id);*/ // drCustomerMeter;
return View();
}
// GET: GasMeters/Create
public ActionResult Create()
{
return View();
}
// POST: GasMeters/Create
[HttpPost]
public ActionResult Create(FormCollection collection)
{
try
{
// TODO: Add insert logic here
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (!string.IsNullOrEmpty(collection["MeterNumber"]))
{
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
// Get the list of gas meters and store it in the data set
dsGasMeters.ReadXml(fsGasMeters);
}
}
// Prepare to create a new record
DataRow drGasMeter = dtGasMeters.NewRow();
// Specify the value for each column using the values of the controls from the form
drGasMeter["meter-number"] = collection["MeterNumber"];
drGasMeter["make"] = collection["Make"];
drGasMeter["model"] = collection["Model"];
drGasMeter["meter-reading-date"] = collection["MeterReadingDate"];
drGasMeter["counter-value"] = collection["CounterValue"];
// Add the new record to the data table
dtGasMeters.Rows.Add(drGasMeter);
// Save the record
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
dsGasMeters.WriteXml(fsGasMeters);
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
// GET: GasMeters/Edit/5
public ActionResult Edit(int id)
{
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
// If a file for the records of gas meters exists, open it and store the records in the data set.
dsGasMeters.ReadXml(fsGasMeters);
// Check each record.
foreach (DataRow drGasMeter in dsGasMeters.Tables[0].Rows)
{
if (int.Parse(drGasMeter["gas-meter-id"].ToString()) == id)
{
/* If you find a gas meter that has the same Gas Meter ID
* as the value passed as argument, send that record to the view. */
ViewBag.GasMeter = drGasMeter;
}
}
}
}
return View();
}
// POST: GasMeters/Edit/5
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
try
{
// TODO: Add update logic here
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
/* Get a list of gas meters and store them in a data set. */
dsGasMeters.ReadXml(fsGasMeters);
}
}
// Get ready to update a record of gas meters
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
// Check each gas meter record
foreach (DataRow drGasMeter in dsGasMeters.Tables[0].Rows)
{
// If you find a gas meter that has the same Gas Meter ID as the argument, ...
if (int.Parse(drGasMeter["gas-meter-id"].ToString()) == id)
{
// ..., get ready to update the record
drGasMeter.BeginEdit();
// Change/Specify the value of each column based on the corresponding column of the table
drGasMeter["meter-number"] = collection["MeterNumber"];
drGasMeter["make"] = collection["Make"];
drGasMeter["model"] = collection["Model"];
drGasMeter["meter-reading-date"] = collection["MeterReadingDate"];
drGasMeter["counter-value"] = collection["CounterValue"];
// Stop editing the record
drGasMeter.EndEdit();
// Save the edited record
dsGasMeters.WriteXml(fsGasMeters);
// If you had found, and then edited, the record, stop checking
break;
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
// GET: GasMeters/Delete/5
public ActionResult Delete(int id)
{
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
// Check whether a file for a list of records exists already
if (System.IO.File.Exists(strGasMetersFile))
{
// If the file exists, get ready to open it
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
// Store the list of records in the data set.
dsGasMeters.ReadXml(fsGasMeters);
// Check each record
foreach (DataRow drGasMeter in dsGasMeters.Tables[0].Rows)
{
// If you find a record that has the same Gas Meter ID as the argument, ...
if (int.Parse(drGasMeter["gas-meter-id"].ToString()) == id)
{
// Get each value of the record and send it to the view
ViewBag.GasMeterID = drGasMeter["gas-meter-id"];
ViewBag.MeterNumber = drGasMeter["meter-number"];
ViewBag.Make = drGasMeter["make"];
ViewBag.Model = drGasMeter["model"];
ViewBag.MeterReadingDate = DateTime.Parse(drGasMeter["meter-reading-date"].ToString()).ToLongDateString();
ViewBag.CounterValue = drGasMeter["counter-value"];
}
}
}
}
return View();
}
// POST: GasMeters/Delete/5
[HttpPost]
public ActionResult Delete(int id, FormCollection collection)
{
try
{
// TODO: Add delete logic here
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
// Check whether a file for gas meters was already created
if (System.IO.File.Exists(strGasMetersFile))
{
// If so, open it, ...
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open,
FileAccess.Read, FileShare.Read))
{
// ... and store it in a data set
dsGasMeters.ReadXml(fsGasMeters);
// Check each gas meter record
foreach (DataRow drGasMeter in dsGasMeters.Tables[0].Rows)
{
// If you find a gas meter record that the same Gas Meter ID as the argument, ...
if (int.Parse(drGasMeter["gas-meter-id"].ToString()) == id)
{
// ... delelete it, ...
dsGasMeters.Tables[0].Rows.Remove(drGasMeter);
break;
}
}
}
// ... and save the file
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Create,
FileAccess.Write, FileShare.Write))
{
dsGasMeters.WriteXml(fsGasMeters);
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
}
}@{
ViewBag.Title = "Delete Gas Meter";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">Delete Gas Meter</h2>
<hr />
<h3 class="common-font blue">Are you sure you want to remove this gas meter from the database?</h3>
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Gas Meter ID:</td>
<td>@ViewBag.GasMeterID</td>
</tr>
<tr>
<td class="bold">Meter #:</td>
<td>@ViewBag.MeterNumber</td>
</tr>
<tr>
<td class="bold">Make:</td>
<td>@ViewBag.Make</td>
</tr>
<tr>
<td class="bold">Model:</td>
<td>@ViewBag.Model</td>
</tr>
<tr>
<td class="bold">Meter Reading Date:</td>
<td>@ViewBag.MeterReadingDate</td>
</tr>
<tr>
<td class="bold">Counter Value:</td>
<td>@ViewBag.CounterValue</td>
</tr>
</table>
<hr />
@using (Html.BeginForm())
{
<div>
<input type="submit" value="Remove this Gas Meter" class="btn btn-warning" /> ::
<a class="btn btn-warning" href="/GasMeters/Index">Gas Meters</a>
</div>
}
</div>using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class CustomersController : Controller
{
private readonly DataColumn dcCity;
private readonly DataColumn dcState;
private readonly DataColumn dcCounty;
private readonly DataColumn dcZIPCode;
private readonly DataColumn dcAddress;
private readonly DataColumn dcLastName;
private readonly DataColumn dcFirstName;
private readonly DataColumn dcCustomerID;
private readonly DataColumn dcMeterNumber;
private readonly DataColumn dcAccountNumber;
public DataTable dtCustomers;
public DataSet dsCustomers;
public CustomersController()
{
dcCustomerID = new DataColumn("customer-id")
{
AutoIncrement = true,
AutoIncrementSeed = 1,
AutoIncrementStep = 1
};
dcCity = new DataColumn("city", Type.GetType("System.String"));
dcState = new DataColumn("state", Type.GetType("System.String"));
dcCounty = new DataColumn("county", Type.GetType("System.String"));
dcAddress = new DataColumn("address", Type.GetType("System.String"));
dcZIPCode = new DataColumn("zip-code", Type.GetType("System.String"));
dcLastName = new DataColumn("last-name", Type.GetType("System.String"));
dcFirstName = new DataColumn("first-name", Type.GetType("System.String"));
dcMeterNumber = new DataColumn("meter-number", Type.GetType("System.String"));
dcAccountNumber = new DataColumn("account-number", Type.GetType("System.String"))
{
Unique = true
};
dtCustomers = new DataTable("customer");
dtCustomers.Columns.Add(dcCustomerID);
dtCustomers.Columns.Add(dcAccountNumber);
dtCustomers.Columns.Add(dcMeterNumber);
dtCustomers.Columns.Add(dcFirstName);
dtCustomers.Columns.Add(dcLastName);
dtCustomers.Columns.Add(dcAddress);
dtCustomers.Columns.Add(dcCity);
dtCustomers.Columns.Add(dcCounty);
dtCustomers.Columns.Add(dcState);
dtCustomers.Columns.Add(dcZIPCode);
dsCustomers = new DataSet("customers");
dsCustomers.Tables.Add(dtCustomers);
}
// GET: Customers
public ActionResult Index()
{
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsCustomers);
}
}
ViewBag.Customers = dsCustomers.Tables[0].Rows;
return View();
}
// GET: Customers/Details/5
public ActionResult Details(int id)
{
DataRow drCustomer = null;
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsGasMeters = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsGasMeters);
foreach (DataRow drClient in dsCustomers.Tables[0].Rows)
{
if (int.Parse(drClient["customer-id"].ToString()) == id)
{
drCustomer = drClient;
}
}
}
}
ViewBag.Customer = drCustomer;
return View();
}
// GET: Customers/Create
public ActionResult Create()
{
return View();
}
// POST: Customers/Create
[HttpPost]
public ActionResult Create(FormCollection collection)
{
try
{
// TODO: Add insert logic here
GasMetersController gasMtrCtrlr = new GasMetersController();
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
// We want to make sure the user provides an account number for the customer
if (!string.IsNullOrEmpty(collection["AccountNumber"]))
{
// If that's the case, check whether an XML file for customers was previously created
if (System.IO.File.Exists(strCustomersFile))
{
// If there is such a file, open it ...
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
// and store the list of customers in the Customers data set
dsCustomers.ReadXml(fsCustomers);
}
}
// Since we have all the necessary information, let's create a record
DataRow drCustomer = dtCustomers.NewRow();
drCustomer["account-number"] = collection["AccountNumber"];
drCustomer["meter-number"] = collection["MeterNumber"];
drCustomer["first-name"] = collection["FirstName"];
drCustomer["last-name"] = collection["LastName"];
drCustomer["address"] = collection["Address"];
drCustomer["city"] = collection["City"];
drCustomer["county"] = collection["County"];
drCustomer["state"] = collection["State"];
drCustomer["zip-code"] = collection["ZIPCode"];
dtCustomers.Rows.Add(drCustomer);
// Save the record
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write))
{
dsCustomers.WriteXml(fsCustomers);
}
}
// Return the user to the list of customers
return RedirectToAction("Index");
}
catch
{
return View();
}
}
// GET: Customers/Edit/5
public ActionResult Edit(int id)
{
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsCustomers);
foreach (DataRow drCustomer in dsCustomers.Tables[0].Rows)
{
if (int.Parse(drCustomer["customer-id"].ToString()) == id)
{
ViewBag.Customer = drCustomer;
}
}
}
}
return View();
}
// POST: Customers/Edit/5
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
try
{
// TODO: Add update logic here
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsCustomers);
}
}
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
foreach (DataRow drCustomer in dsCustomers.Tables[0].Rows)
{
if (int.Parse(drCustomer["customer-id"].ToString()) == id)
{
drCustomer.BeginEdit();
drCustomer["account-number"] = collection["AccountNumber"];
drCustomer["meter-number"] = collection["MeterNumber"];
drCustomer["first-name"] = collection["FirstName"];
drCustomer["last-name"] = collection["LastName"];
drCustomer["address"] = collection["Address"];
drCustomer["city"] = collection["City"];
drCustomer["county"] = collection["County"];
drCustomer["state"] = collection["State"];
drCustomer["zip-code"] = collection["ZIPCode"];
drCustomer.EndEdit();
dsCustomers.WriteXml(fsCustomers);
break;
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
// GET: Customers/Delete/5
public ActionResult Delete(int id)
{
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsCustomers);
foreach (DataRow drCustomer in dsCustomers.Tables[0].Rows)
{
if (int.Parse(drCustomer["customer-id"].ToString()) == id)
{
ViewBag.CustomerID = drCustomer["customer-id"];
ViewBag.AccountNumber = drCustomer["account-number"];
ViewBag.MeterNumber = drCustomer["meter-number"];
ViewBag.FirstName = drCustomer["first-name"];
ViewBag.LastName = drCustomer["last-name"];
ViewBag.Address = drCustomer["address"];
ViewBag.City = drCustomer["city"];
ViewBag.County = drCustomer["county"];
ViewBag.State = drCustomer["state"];
ViewBag.ZIPCode = drCustomer["zip-code"];
}
}
}
}
return View();
}
// POST: Customers/Delete/5
[HttpPost]
public ActionResult Delete(int id, FormCollection collection)
{
try
{
// TODO: Add delete logic here
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Open,
FileAccess.Read, FileShare.Read))
{
dsCustomers.ReadXml(fsCustomers);
foreach (DataRow drCustomer in dsCustomers.Tables[0].Rows)
{
if (int.Parse(drCustomer["customer-id"].ToString()) == id)
{
dsCustomers.Tables[0].Rows.Remove(drCustomer);
break;
}
}
}
using (FileStream fsCustomers = new FileStream(strCustomersFile, FileMode.Create,
FileAccess.Write, FileShare.Write))
{
dsCustomers.WriteXml(fsCustomers);
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
}
}@{
ViewBag.Title = "Delete Customer Account";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">Delete Customer Account</h2>
<hr />
<h3 class="common-font blue">Are you sure you want to delete the account of this customer?</h3>
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Customer ID:</td>
<td>@ViewBag.CustomerID</td>
</tr>
<tr>
<td class="bold">Account #:</td>
<td>@ViewBag.AccountNumber</td>
</tr>
<tr>
<td class="bold">Meter #:</td>
<td>@ViewBag.MeterNumber</td>
</tr>
<tr>
<td class="bold">First Name:</td>
<td>@ViewBag.FirstName</td>
</tr>
<tr>
<td class="bold">Last Name:</td>
<td>@ViewBag.LastName</td>
</tr>
<tr>
<td class="bold">Address:</td>
<td>@ViewBag.Address</td>
</tr>
<tr>
<td class="bold">City:</td>
<td>@ViewBag.City</td>
</tr>
<tr>
<td class="bold">County:</td>
<td>@ViewBag.County</td>
</tr>
<tr>
<td class="bold">State:</td>
<td>@ViewBag.State</td>
</tr>
<tr>
<td class="bold">ZIP-Code:</td>
<td>@ViewBag.ZIPCode</td>
</tr>
</table>
<hr />
@using (Html.BeginForm())
{
<div>
<input type="submit" value="Delete Customer Account" class="btn btn-warning" /> ::
<a class="btn btn-warning" href="/Customers/Index">Customers</a>
</div>
}
</div>using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class GasBillsController : Controller
{
private readonly DataColumn dcGasBillID;
private readonly DataColumn dcAmountDue;
private readonly DataColumn dcStateTaxes;
private readonly DataColumn dcLocalTaxes;
private readonly DataColumn dcConsumption;
private readonly DataColumn dcBillingDays;
private readonly DataColumn dcTotalTherms;
private readonly DataColumn dcOver50Therms;
private readonly DataColumn dcTotalCharges;
private readonly DataColumn dcAccountNumber;
private readonly DataColumn dcFirst50Therms;
private readonly DataColumn dcDeliveryTotal;
private readonly DataColumn dcLateAmountDue;
private readonly DataColumn dcPaymentDueDate;
private readonly DataColumn dcCounterReadingEnd;
private readonly DataColumn dcCounterReadingStart;
private readonly DataColumn dcMeterReadingEndDate;
private readonly DataColumn dcEnvironmentalCharges;
private readonly DataColumn dcMeterReadingStartDate;
private readonly DataColumn dcTransportationCharges;
private readonly DataColumn dcDistributionAdjustment;
public DataTable dtGasBills;
private DataSet dsGasBills;
public GasBillsController()
{
dcGasBillID = new DataColumn("gas-bill-id")
{
AutoIncrement = true,
AutoIncrementSeed = 1,
AutoIncrementStep = 1
};
dcAmountDue = new DataColumn("amount-due", Type.GetType("System.Decimal"));
dcConsumption = new DataColumn("consumption", Type.GetType("System.Int32"));
dcBillingDays = new DataColumn("billing-days", Type.GetType("System.Int32"));
dcLocalTaxes = new DataColumn("local-taxes", Type.GetType("System.Decimal"));
dcStateTaxes = new DataColumn("state-taxes", Type.GetType("System.Decimal"));
dcTotalTherms = new DataColumn("total-therms", Type.GetType("System.String"));
dcTotalCharges = new DataColumn("total-charges", Type.GetType("System.Decimal"));
dcAccountNumber = new DataColumn("account-number", Type.GetType("System.String"));
dcOver50Therms = new DataColumn("over-50-therms", Type.GetType("System.Decimal"));
dcDeliveryTotal = new DataColumn("delivery-total", Type.GetType("System.Decimal"));
dcFirst50Therms = new DataColumn("first-50-therms", Type.GetType("System.Decimal"));
dcLateAmountDue = new DataColumn("late-amount-due", Type.GetType("System.Decimal"));
dcPaymentDueDate = new DataColumn("payment-due-date", Type.GetType("System.DateTime"));
dcCounterReadingEnd = new DataColumn("counter-reading-end", Type.GetType("System.Int32"));
dcCounterReadingStart = new DataColumn("counter-reading-start", Type.GetType("System.Int32"));
dcEnvironmentalCharges = new DataColumn("environmental-charges", Type.GetType("System.Decimal"));
dcMeterReadingEndDate = new DataColumn("meter-reading-end-date", Type.GetType("System.DateTime"));
dcTransportationCharges = new DataColumn("transportation-charges", Type.GetType("System.Decimal"));
dcDistributionAdjustment = new DataColumn("distribution-adjustment", Type.GetType("System.Decimal"));
dcMeterReadingStartDate = new DataColumn("meter-reading-start-date", Type.GetType("System.DateTime"));
dtGasBills = new DataTable("gas-bill");
dtGasBills.Columns.Add(dcGasBillID);
dtGasBills.Columns.Add(dcAccountNumber);
dtGasBills.Columns.Add(dcMeterReadingStartDate);
dtGasBills.Columns.Add(dcMeterReadingEndDate);
dtGasBills.Columns.Add(dcBillingDays);
dtGasBills.Columns.Add(dcCounterReadingStart);
dtGasBills.Columns.Add(dcCounterReadingEnd);
dtGasBills.Columns.Add(dcConsumption);
dtGasBills.Columns.Add(dcTotalTherms);
dtGasBills.Columns.Add(dcTransportationCharges);
dtGasBills.Columns.Add(dcFirst50Therms);
dtGasBills.Columns.Add(dcOver50Therms);
dtGasBills.Columns.Add(dcDeliveryTotal);
dtGasBills.Columns.Add(dcDistributionAdjustment);
dtGasBills.Columns.Add(dcEnvironmentalCharges);
dtGasBills.Columns.Add(dcTotalCharges);
dtGasBills.Columns.Add(dcLocalTaxes);
dtGasBills.Columns.Add(dcStateTaxes);
dtGasBills.Columns.Add(dcPaymentDueDate);
dtGasBills.Columns.Add(dcAmountDue);
dtGasBills.Columns.Add(dcLateAmountDue);
dsGasBills = new DataSet("gas-bills");
dsGasBills.Tables.Add(dtGasBills);
}
// GET: GasBills
public ActionResult Index()
{
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
}
}
ViewBag.GasBills = dsGasBills.Tables[0].Rows;
return View();
}
// GET: GasBills/Details/5
public ActionResult Details(int id)
{
DataRow drGasBill = null;
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
foreach (DataRow drClient in dsGasBills.Tables[0].Rows)
{
if (int.Parse(drClient["gas-bill-id"].ToString()) == id)
{
drGasBill= drClient;
}
}
}
}
ViewBag.Invoice = drGasBill;
return View();
}
// GET: GasBills/Create
public ActionResult Create()
{
return View();
}
// POST: GasBills/Create
[HttpPost]
public ActionResult Create(FormCollection collection)
{
try
{
// TODO: Add insert logic here
string meterNumber = string.Empty;
string accountNumber = string.Empty;
// We will need all three files
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
string strCustomersFile = Server.MapPath("/GasDistribution/Customers.xml");
string strGasMetersFile = Server.MapPath("/GasDistribution/GasMeters.xml");
// Make sure the user provided an account number for the customer
if (!string.IsNullOrEmpty(collection["AccountNumber"]))
{
// If that's the case, check whether a file for customers was previously created
if (System.IO.File.Exists(strGasBillsFile))
{
// If there is such a file, open it ...
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
// and store the list of invoices in the gas bills data set
dsGasBills.ReadXml(fsGasBills);
}
}
// Based on the provided information for an invoice, prepare to issue a gas bill
DataRow drGasBill = dtGasBills.NewRow();
// We will need the customer account number for a later operation
accountNumber = collection["AccountNumber"];
// Specify the value of each column
drGasBill["account-number"] = collection["AccountNumber"];
drGasBill["meter-reading-start-date"] = collection["MeterReadingStartDate"];
drGasBill["meter-reading-end-date"] = collection["MeterReadingEndDate"];
drGasBill["billing-days"] = collection["BillingDays"];
drGasBill["counter-reading-start"] = collection["CounterReadingStart"];
drGasBill["counter-reading-end"] = collection["CounterReadingEnd"];
drGasBill["consumption"] = collection["Consumption"];
drGasBill["total-therms"] = collection["TotalTherms"];
drGasBill["transportation-charges"] = collection["TransportationCharges"];
drGasBill["first-50-therms"] = collection["First50Therms"];
drGasBill["over-50-therms"] = collection["Over50Therms"];
drGasBill["delivery-total"] = collection["DeliveryTotal"];
drGasBill["distribution-adjustment"] = collection["DistributionAdjustment"];
drGasBill["environmental-charges"] = collection["EnvironmentalCharges"];
drGasBill["total-charges"] = collection["TotalCharges"];
drGasBill["local-taxes"] = collection["LocalTaxes"];
drGasBill["state-taxes"] = collection["StateTaxes"];
drGasBill["payment-due-date"] = collection["PaymentDueDate"];
drGasBill["amount-due"] = collection["AmountDue"];
drGasBill["late-amount-due"] = collection["LateAmountDue"];
// Add the gas bill to the data table
dtGasBills.Rows.Add(drGasBill);
// Save the gas bill
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write))
{
dsGasBills.WriteXml(fsGasBills);
}
// When a gas bill has been issued, we want to updat the customer's gas meter (this is not necessary, just a convenience).
/* To start, we want to know the gas meter used by the customer.
* The gas meter number can be found in the customer account. */
// A table for customers was created in its controller
CustomersController clientController = new CustomersController();
// Open the file that contains the customers record, ...
if (System.IO.File.Exists(strCustomersFile))
{
using (FileStream fsGasMeters = new FileStream(strCustomersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
clientController.dsCustomers.ReadXml(fsGasMeters);
// ... and locate the customer account number
foreach (DataRow drClient in clientController.dsCustomers.Tables[0].Rows)
{
if (drClient["account-number"].ToString() == accountNumber)
{
// Get the meter number used by the customer
meterNumber = drClient["meter-number"].ToString();
}
}
}
}
// Now that we have the meter number, let's get the gas meter record.
// The table of gas meters was created in its controller
GasMetersController gmc = new GasMetersController();
if (System.IO.File.Exists(strGasMetersFile))
{
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
/* Get a list of gas meters and store them in a data set. */
gmc.dsGasMeters.ReadXml(fsGasMeters);
}
}
// Get ready to update a record of gas meters
using (FileStream fsGasMeters = new FileStream(strGasMetersFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
// Check each gas meter record
foreach (DataRow drGasMeter in gmc.dsGasMeters.Tables[0].Rows)
{
// If you find a gas meter that has the meter number found above, ...
if (drGasMeter["meter-number"].ToString() == meterNumber)
{
drGasMeter.BeginEdit();
// Change the value of the meter reading date...
drGasMeter["meter-reading-date"] = collection["MeterReadingEndDate"];
// ... and the counter value
drGasMeter["counter-value"] = collection["CounterReadingEnd"];
drGasMeter.EndEdit();
// Save the edited record
gmc.dsGasMeters.WriteXml(fsGasMeters);
// If you had found, and then edited, the record, stop checking
break;
}
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
// GET: GasBills/Edit/5
public ActionResult Edit(int id)
{
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
foreach (DataRow drGasBill in dsGasBills.Tables[0].Rows)
{
if (int.Parse(drGasBill["gas-bill-id"].ToString()) == id)
{
ViewBag.GasBill = drGasBill;
}
}
}
}
return View();
}
// POST: GasBills/Edit/5
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
try
{
// TODO: Add update logic here
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
}
}
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
foreach (DataRow drGasBill in dsGasBills.Tables[0].Rows)
{
if (int.Parse(drGasBill["gas-bill-id"].ToString()) == id)
{
drGasBill.BeginEdit();
drGasBill["account-number"] = collection["AccountNumber"];
drGasBill["meter-reading-start-date"] = collection["MeterReadingStartDate"];
drGasBill["meter-reading-end-date"] = collection["MeterReadingEndDate"];
drGasBill["billing-days"] = collection["BillingDays"];
drGasBill["counter-reading-start"] = collection["CounterReadingStart"];
drGasBill["counter-reading-end"] = collection["CounterReadingEnd"];
drGasBill["consumption"] = collection["Consumption"];
drGasBill["total-therms"] = collection["TotalTherms"];
drGasBill["transportation-charges"] = collection["TransportationCharges"];
drGasBill["first-50-therms"] = collection["First50Therms"];
drGasBill["over-50-therms"] = collection["Over50Therms"];
drGasBill["delivery-total"] = collection["DeliveryTotal"];
drGasBill["distribution-adjustment"] = collection["DistributionAdjustment"];
drGasBill["environmental-charges"] = collection["EnvironmentalCharges"];
drGasBill["total-charges"] = collection["TotalCharges"];
drGasBill["local-taxes"] = collection["LocalTaxes"];
drGasBill["state-taxes"] = collection["StateTaxes"];
drGasBill["payment-due-date"] = collection["PaymentDueDate"];
drGasBill["amount-due"] = collection["AmountDue"];
drGasBill["late-amount-due"] = collection["LateAmountDue"];
drGasBill.EndEdit();
dsGasBills.WriteXml(fsGasBills);
break;
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
// GET: GasBills/Delete/5
public ActionResult Delete(int id)
{
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
foreach (DataRow drGasBill in dsGasBills.Tables[0].Rows)
{
if (int.Parse(drGasBill["gas-bill-id"].ToString()) == id)
{
ViewBag.GasBillID = drGasBill["gas-bill-id"];
ViewBag.AccountNumber = drGasBill["account-number"];
ViewBag.MeterReadingStartDate = DateTime.Parse(drGasBill["meter-reading-start-date"].ToString()).ToLongDateString();
ViewBag.MeterReadingEndDate = DateTime.Parse(drGasBill["meter-reading-end-date"].ToString()).ToLongDateString();
ViewBag.BillingDays = drGasBill["billing-days"];
ViewBag.CounterReadingStart = drGasBill["counter-reading-start"];
ViewBag.CounterReadingEnd = drGasBill["counter-reading-end"];
ViewBag.Consumption = drGasBill["consumption"];
ViewBag.TotalTherms = drGasBill["total-therms"];
ViewBag.TransportationCharges = drGasBill["transportation-charges"];
ViewBag.First50Therms = drGasBill["first-50-therms"];
ViewBag.Over50Therms = drGasBill["over-50-therms"];
ViewBag.DeliveryTotal = drGasBill["delivery-total"];
ViewBag.DistributionAdjustment = drGasBill["distribution-adjustment"];
ViewBag.EnvironmentalCharges = drGasBill["environmental-charges"];
ViewBag.TotalCharges = drGasBill["total-charges"];
ViewBag.LocalTaxes = drGasBill["local-taxes"];
ViewBag.StateTaxes = drGasBill["state-taxes"];
ViewBag.PaymentDueDate = DateTime.Parse(drGasBill["payment-due-date"].ToString()).ToLongDateString();
ViewBag.AmountDue = drGasBill["amount-due"];
ViewBag.LateAmountDue = drGasBill["late-amount-due"];
}
}
}
}
return View();
}
// POST: GasBills/Delete/5
[HttpPost]
public ActionResult Delete(int id, FormCollection collection)
{
try
{
// TODO: Add delete logic here
string strGasBillsFile = Server.MapPath("/GasDistribution/GasBills.xml");
if (System.IO.File.Exists(strGasBillsFile))
{
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Open,
FileAccess.Read, FileShare.Read))
{
dsGasBills.ReadXml(fsGasBills);
foreach (DataRow drGasBill in dsGasBills.Tables[0].Rows)
{
if (int.Parse(drGasBill["gas-bill-id"].ToString()) == id)
{
dsGasBills.Tables[0].Rows.Remove(drGasBill);
break;
}
}
}
using (FileStream fsGasBills = new FileStream(strGasBillsFile, FileMode.Create,
FileAccess.Write, FileShare.Write))
{
dsGasBills.WriteXml(fsGasBills);
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
}
}@{
ViewBag.Title = "Deleting Gas Bill";
Layout = "~/Views/Shared/_Arrangement.cshtml";
}
<h2 class="text-center common-font bold">Cancelling Gas Bill</h2>
<hr />
<h3 class="common-font blue">Are you sure you want to cancel this gas bill?</h3>
<div class="utility-container">
<table class="common-font">
<tr>
<td class="large bold">Gas Bill ID:</td>
<td>@ViewBag.GasBillID</td>
</tr>
<tr>
<td class="bold">Account #:</td>
<td>@ViewBag.AccountNumber</td>
</tr>
<tr>
<td class="bold">Meter Reading Start Date:</td>
<td>@ViewBag.MeterReadingStartDate</td>
</tr>
<tr>
<td class="bold">Meter Reading End Date:</td>
<td>@ViewBag.MeterReadingEndDate</td>
</tr>
<tr>
<td class="bold">Billing Days:</td>
<td>@ViewBag.BillingDays</td>
</tr>
<tr>
<td class="bold">Counter Reading Start:</td>
<td>@ViewBag.CounterReadingStart</td>
</tr>
<tr>
<td class="bold">Counter Reading End:</td>
<td>@ViewBag.CounterReadingEnd</td>
</tr>
<tr>
<td class="bold">Consumption:</td>
<td>@ViewBag.Consumption</td>
</tr>
<tr>
<td class="bold">Total Therms:</td>
<td>@ViewBag.TotalTherms</td>
</tr>
<tr>
<td class="bold">Transportation Charges:</td>
<td>@ViewBag.TransportationCharges</td>
</tr>
<tr>
<td class="bold">First 50 Therms:</td>
<td>@ViewBag.First50Therms</td>
</tr>
<tr>
<td class="bold">Over 50 Therms:</td>
<td>@ViewBag.Over50Therms</td>
</tr>
<tr>
<td class="bold">Delivery Total:</td>
<td>@ViewBag.DeliveryTotal</td>
</tr>
<tr>
<td class="bold">Distribution Adjustment:</td>
<td>@ViewBag.DistributionAdjustment</td>
</tr>
<tr>
<td class="bold">Environmental Charges:</td>
<td>@ViewBag.EnvironmentalCharges</td>
</tr>
<tr>
<td class="bold">Total Charges:</td>
<td>@ViewBag.TotalCharges</td>
</tr>
<tr>
<td class="bold">Local Taxes:</td>
<td>@ViewBag.LocalTaxes</td>
</tr>
<tr>
<td class="bold">State Taxes:</td>
<td>@ViewBag.StateTaxes</td>
</tr>
<tr>
<td class="bold">Payment Due Date:</td>
<td>@ViewBag.PaymentDueDate</td>
</tr>
<tr>
<td class="bold">Amount Due:</td>
<td>@ViewBag.AmountDue</td>
</tr>
<tr>
<td class="bold">Late Amount Due:</td>
<td>@ViewBag.LateAmountDue</td>
</tr>
</table>
<hr />
@using (Html.BeginForm())
{
<div>
<input type="submit" value="Delete this Gas Bill" class="btn btn-warning" /> ::
<a class="btn btn-warning" href="/GasBills/Index">Customers Gas Bills</a>
</div>
}
</div>using System;
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany1.Controllers
{
public class PaymentsController : Controller
{
private readonly DataColumn dcGasBillID;
private readonly DataColumn dcPaymentID;
private readonly DataColumn dcPaymentDate;
private readonly DataColumn dcPaymentAmount;
private readonly DataColumn dcPaymentStatus;
private DataTable dtPayments;
private DataSet dsPayments;
public PaymentsController()
{
dcPaymentID = new DataColumn("payment-id")
{
AutoIncrement = true,
AutoIncrementSeed = 1,
AutoIncrementStep = 1
};
dcPaymentStatus = new DataColumn("payment-status")
{
DataType = Type.GetType("System.String")
};
dcGasBillID = new DataColumn("gas-bill-id", Type.GetType("System.Int32"));
dcPaymentDate = new DataColumn("payment-date", Type.GetType("System.DateTime"));
dcPaymentAmount = new DataColumn("payment-amount", Type.GetType("System.Decimal"));
dtPayments = new DataTable("payment");
dtPayments.Columns.Add(dcPaymentID);
dtPayments.Columns.Add(dcPaymentDate);
dtPayments.Columns.Add(dcGasBillID);
dtPayments.Columns.Add(dcPaymentAmount);
dtPayments.Columns.Add(dcPaymentStatus);
dsPayments = new DataSet("payments");
dsPayments.Tables.Add(dtPayments);
}
// GET: Payments
public ActionResult Index()
{
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
}
}
// Prepare to use the list of records in a webpage.
ViewBag.Payments = dsPayments.Tables[0].Rows;
return View();
}
// GET: Payments/Details/5
public ActionResult Details(int id)
{
DataRow drInvoice = null;
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
foreach (DataRow drPayment in dsPayments.Tables[0].Rows)
{
if (int.Parse(drPayment["payment-id"].ToString()) == id)
{
drInvoice = drPayment;
}
}
}
}
ViewBag.Payment = drInvoice;
return View();
}
// GET: Payments/Create
public ActionResult Create()
{
return View();
}
// POST: Payments/Create
[HttpPost]
public ActionResult Create(FormCollection collection)
{
try
{
// TODO: Add insert logic here
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
}
}
DataRow drPayment = dtPayments.NewRow();
drPayment["payment-date"] = collection["PaymentDate"];
drPayment["gas-bill-id"] = collection["GasBillID"];
drPayment["payment-amount"] = collection["PaymentAmount"];
drPayment["payment-status"] = collection["PaymentStatus"];
dtPayments.Rows.Add(drPayment);
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
dsPayments.WriteXml(fsPayments);
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
// GET: Payments/Edit/5
public ActionResult Edit(int id)
{
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
foreach (DataRow drPayment in dsPayments.Tables[0].Rows)
{
if (int.Parse(drPayment["payment-id"].ToString()) == id)
{
ViewBag.Payment = drPayment;
}
}
}
}
return View();
}
// POST: Payments/Edit/5
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
try
{
// TODO: Add update logic here
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
}
}
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
{
foreach (DataRow drPayment in dsPayments.Tables[0].Rows)
{
if (int.Parse(drPayment["payment-id"].ToString()) == id)
{
drPayment.BeginEdit();
drPayment["payment-date"] = collection["PaymentDate"];
drPayment["gas-bill-id"] = collection["GasBillID"];
drPayment["payment-amount"] = collection["PaymentAmount"];
drPayment["payment-status"] = collection["PaymentStatus"];
drPayment.EndEdit();
dsPayments.WriteXml(fsPayments);
break;
}
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
// GET: Payments/Delete/5
public ActionResult Delete(int id)
{
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
foreach (DataRow drPayment in dsPayments.Tables[0].Rows)
{
if (int.Parse(drPayment["payment-id"].ToString()) == id)
{
ViewBag.PaymentID = drPayment["payment-id"];
ViewBag.PaymentDate = DateTime.Parse(drPayment["payment-date"].ToString()).ToLongDateString();
ViewBag.GasBillID = drPayment["gas-bill-id"];
ViewBag.PaymentAmount = drPayment["payment-amount"];
ViewBag.PaymentStatus = drPayment["payment-status"];
}
}
}
}
return View();
}
// POST: Payments/Delete/5
[HttpPost]
public ActionResult Delete(int id, FormCollection collection)
{
try
{
// TODO: Add delete logic here
string strPaymentsFile = Server.MapPath("/GasDistribution/Payments.xml");
if (System.IO.File.Exists(strPaymentsFile))
{
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Open,
FileAccess.Read, FileShare.Read))
{
dsPayments.ReadXml(fsPayments);
foreach (DataRow drPayment in dsPayments.Tables[0].Rows)
{
if (int.Parse(drPayment["payment-id"].ToString()) == id)
{
dsPayments.Tables[0].Rows.Remove(drPayment);
break;
}
}
}
using (FileStream fsPayments = new FileStream(strPaymentsFile, FileMode.Create,
FileAccess.Write, FileShare.Write))
{
dsPayments.WriteXml(fsPayments);
}
}
return RedirectToAction("Index");
}
catch
{
return View();
}
}
}
}@{
ViewBag.Title = "Delete Bill Payment";
Layout = "~/Views/Shared/_Arrangement.cshtml";
string pmtDate = DateTime.Parse(ViewBag.PaymentDate).ToLongDateString();
}
<h2 class="text-center common-font bold">Cancel Bill Payment</h2>
<hr />
<h3 class="common-font blue">Are you sure you want to delete/cancel this gas bill Payment?</h3>
<div class="utility-container">
<table class="common-font">
<tr>
<td class="medium bold">Payment ID:</td>
<td>@ViewBag.PaymentID</td>
</tr>
<tr>
<td class="bold">Payment Date:</td>
<td>@pmtDate</td>
</tr>
<tr>
<td class="bold">Gas Bill ID:</td>
<td>@ViewBag.GasBillID</td>
</tr>
<tr>
<td class="bold">Payment Amount:</td>
<td>@ViewBag.PaymentAmount</td>
</tr>
<tr>
<td class="bold">Payment Status:</td>
<td>@ViewBag.PaymentStatus</td>
</tr>
</table>
<hr />
@using (Html.BeginForm())
{
<div>
<input type="submit" value="Delete Gas Bill Payment" class="btn btn-warning" /> ::
<a class="btn btn-warning" href="/Payments/Index">Bills Payments</a>
</div>
}
</div>
Deleting a Record by its Index
When calling the DataRowCollection.Remove() method, you must pass an exact identification of the record. If you don't have that identification, you can delete a record based on its index. To do this, you would call the DataRowCollection.RemoveAt() method. Its syntax is:
public void RemoveAt(int index);
This method takes as argument the index of the record you want to delete. If a record with that index exists, it would be deleted.
Deleting all Records From a Table
To delete all records of a table, call the DataRowCollection.Clear() method. Its syntax is:
public void Clear();
This method is used to clear the table of all records. Here is an example:
@{
tblStudent.Rows.Clear();
}
Deleting all Records From all Tables
If you have many tables in a data set and you want to delete all records in all tables, to assist you, the DataSet class is equipped with a method named Clear. Its syntax is:
public void Clear();
Here is an example:
using System.IO;
using System.Data;
using System.Web.Mvc;
namespace GasUtilityCompany.Controllers
{
public class BusinessController : Controller
{
. . . No Change
// GET: Business
public ActionResult Index()
{
return View();
}
// GET: Business/CreateGasMeter
public ActionResult CreateGasMeter(string MeterNumber, string Make, string Model, string CounterValue)
{
. . . No Change
return View();
}
// GET: Services/CreateCustomerAccount
public ActionResult CreateCustomerAccount()
{
return View();
}
// GET: Services/SaveCustomerAccount
public ActionResult SaveCustomerAccount(string AccountNumber, string MeterNumber,
string FirstName, string LastName,
string Address, string City, string County, string State, string ZIPCode)
{
bool validNumber = false;
bool validAccount = false;
string fileGasCompany = Server.MapPath("~/App_Data/GasCompany.xml");
if (!string.IsNullOrEmpty(AccountNumber))
{
validAccount = true;
}
if (System.IO.File.Exists(fileGasCompany))
{
using (FileStream fsGasMeters = new FileStream(fileGasCompany, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsServices.ReadXml(fsGasMeters);
for (int i = 0; i < dsServices.Tables[0].Rows.Count; i++)
{
DataRow drGasMeter = dsServices.Tables[0].Rows[i];
if (drGasMeter[0].ToString() == MeterNumber)
{
validNumber = true;
break;
}
}
}
}
dsServices.Clear();
if ((validAccount == true) && (validNumber == true))
{
if (System.IO.File.Exists(fileGasCompany))
{
using (FileStream fsGasCompany = new FileStream(fileGasCompany, FileMode.Open, FileAccess.Read, FileShare.Read))
{
dsServices.ReadXml(fsGasCompany);
}
}
DataRow drCustomer = dtCustomers.NewRow();
drCustomer["account-number"] = AccountNumber;
drCustomer["meter-number"] = MeterNumber;
drCustomer["first-name"] = FirstName;
drCustomer["last-name"] = LastName;
drCustomer["address"] = Address;
drCustomer["city"] = City;
drCustomer["county"] = County;
drCustomer["state"] = State;
drCustomer["zip-code"] = ZIPCode;
dtCustomers.Rows.Add(drCustomer);
using (FileStream fsGasCompany = new FileStream(fileGasCompany, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write))
{
dsServices.WriteXml(fsGasCompany);
}
}
return RedirectToAction("CreateCustomerAccount");
}
}
}
Practical Learning: Ending the Lesson
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