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Creating a Client Server Application

       

Practical LearningPractical Learning: Creating Cars

  1. To add a new class to the project, in the Class View, right-click BethedaCarRental1 -> Add -> Class...
  2. Set the Class Name to Car and click Add
  3. Change the file as follows:
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    
    namespace BethesdaCarRental1
    {
        [Serializable]
        public class Car
        {
            public string Make;
            public string Model;
            public int Year;
            public string Category;
            public bool HasCDPlayer;
            public bool HasDVDPlayer;
            public bool IsAvailable;
    
            public Car(string mk = "Good", string mdl = "Special",
                       int yr = 1960, string cat = "Unknown", bool cd = false,
                       bool dvd = false, bool avl = false)
            {
                Make = mk;
                Model = mdl;
                Year = yr;
                Category = cat;
                HasCDPlayer = cd;
                HasDVDPlayer = dvd;
                IsAvailable = avl;
            }
        }
    }
  4. To add a new form to the application, in the Solution Explorer, right-click BethesdaCarRental1 -> Add -> Windows Forms
  5. Set the Name to CarEditor and click Add
  6. Design the form as follows: 
     
    Bethesda Car Rental - Car Editor
    Control Text Name Other Properties
    Label Text #    
    TextBox   txtTagNumber  
    Label Make:    
    TextBox   txtMake  
    Label Model:    
    TextBox   txtModel  
    Label Year:    
    TextBox   txtYear  
    Label Category:    
    ComboBox   cboCategories DropDownStyle: DropDownList
    Items: Economy
    Compact
    Standard
    Full Size
    Mini Van
    SUV
    Truck
    Van
    PictureBox   pbxCar SizeMode: Zoom
    CheckBox CD Player chkCDPlayer CheckAlign: MiddleRight
    CheckBox DVD Player chkDVDPlayer CheckAlign: MiddleRight
    Button Select Car Picture... btnSelectPicture  
    CheckBox Available chkAvailable CheckAlign: MiddleRight
    Label Picture Name lblPictureName  
    Button Submit btnSubmit  
    Button Close btnClose DialogResult: Cancel
    OpenFileDialog (Name): dlgOpen
    Title: Select Item Picture
    DefaultExt: jpg
    Filter: JPEG Files (*.jpg,*.jpeg)|*.jpg|GIF Files (*.gif)|*.gif|Bitmap Files (*.bmp)|*.bmp|PNG Files (*.png)|*.png
    Form     FormBorderStyle: FixedDialog
    MaximizeBox: False
    MinimizeBox: False
    ShowInTaskbar: False
  7. Double-click the Select Car Picture button and implement its event as follows:
    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    using System.IO;
    using System.Runtime.Serialization.Formatters.Binary;
    
    namespace BethesdaCarRental1
    {
        public partial class CarEditor : Form
        {
            Dictionary<string, Car> ListOfCars;
    
            public CarEditor()
            {
                InitializeComponent();
            }
    
            private void btnSelectPicture_Click(object sender, EventArgs e)
            {
                if (dlgPicture.ShowDialog() == DialogResult.OK)
                {
                    lblPictureName.Text = dlgPicture.FileName;
                    pbxCar.Image = Image.FromFile(lblPictureName.Text);
                }
            }
        }
    }
  8. Return to the Car Editor form
  9. Double-click an unoccupied area of the form
  10. Implement the Load event as follows:
    private void CarEditor_Load(object sender, EventArgs e)
    {
        Car vehicle = new Car();
        BinaryFormatter bfmCars = new BinaryFormatter();
    
        string FileName = @"\\EXPRESSION\Bethesda Car Rental\Cars.crs";
        lblPictureName.Text = ".";
    
        if (File.Exists(FileName))
        {
            FileStream stmCars = new FileStream(FileName,
                                                FileMode.Open,
                                                FileAccess.Read,
                                                FileShare.Read);
            try
            {
                // Retrieve the list of cars
                ListOfCars = (Dictionary<string, Car>)bfmCars.Deserialize(stmCars);
            }
            finally
            {
                stmCars.Close();
            }
        }
        else
            ListOfCars = new Dictionary<string, Car>();
    }
  11. Return to the Car Editor form
  12. Double-click the Submit button and implement its Click event as follows:
    private void btnSubmit_Click(object sender, EventArgs e)
    {
        Car vehicle = new Car();
        FileStream stmCars = null;
        BinaryFormatter bfmCars = new BinaryFormatter();
        string strFilename = @"\\EXPRESSION\Bethesda Car Rental\Cars.crs";
    
        if (txtTagNumber.Text.Length == 0)
        {
            MessageBox.Show("You must enter the car's tag number");
            return;
        }
    
        if (txtMake.Text.Length == 0)
        {
            MessageBox.Show("You must specify the car's manufacturer");
            return;
        }
    
        if (txtModel.Text.Length == 0)
        {
            MessageBox.Show("You must enter the model of the car");
            return;
        }
    
        if (txtYear.Text.Length == 0)
        {
            MessageBox.Show("You must enter the year of the car");
            return;
        }
    
        // Create a car
        vehicle.Make = txtMake.Text;
        vehicle.Model = txtModel.Text;
        vehicle.Year = int.Parse(txtYear.Text);
        vehicle.Category = cbxCategories.Text;
        vehicle.HasCDPlayer = chkCDPlayer.Checked;
        vehicle.HasDVDPlayer = chkDVDPlayer.Checked;
        vehicle.IsAvailable = chkAvailable.Checked;
    
        // Call the Add method of our collection class to add the car
        listOfCars.Add(txtTagNumber.Text, vehicle);
    
        // Save the list
        stmCars = new FileStream(strFilename,
                                 FileMode.Create,
                                 FileAccess.Write,
                                 FileShare.Write);
    
        try
        {
            bfmCars.Serialize(stmCars, listOfCars);
    
            if (lblPictureName.Text.Length != 0)
            {
                FileInfo flePicture = new FileInfo(lblPictureName.Text);
                flePicture.CopyTo(@"\\EXPRESSION\Bethesda Car Rental\" +
                                  txtTagNumber.Text +
                                  flePicture.Extension);
            }
    
            txtTagNumber.Text = "";
            txtMake.Text = "";
            txtModel.Text = "";
            txtYear.Text = "";
            cbxCategories.Text = "Economy";
            chkCDPlayer.Checked = false;
            chkDVDPlayer.Checked = false;
            chkAvailable.Checked = false;
            lblPictureName.Text = ".";
            pbxCar.Image = null;
        }
        finally
        {
            stmCars.Close();
        }
    }
  13. Display the Central form
  14. Double-click the Cars button and implement its event as follows:
    private void btnCars_Click(object sender, EventArgs e)
    {
        CarEditor dlgCars = new CarEditor();
        dlgCars.ShowDialog();
    }
  15. To save the project, on the Standard toolbar, click the Save All button
 
 
     
 

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