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GDI+ Application: Weekly Sales
 

Weekly Sales

Description

This is an example of a vertical rectangular chart. To draw the rectangles, we use simple solid brushes.

Windows Controls:

 

Practical LearningPractical Learning: Using a Solid Brush
  1. Start a new Windows Forms Application named WeeklySales2
  2. Design the form as follows:
     
    Company Weekly Sales
    Control Name Text Other Properties
    Label   Monday  
    Label Label   Tuesday  
    Label Label   Wednesday  
    Label Label   Thursday  
    Label Label   Friday  
    TextBox TextBox txtMonday 12000 TextAlign: Right
    TextBox TextBox txtTuesday 11000 TextAlign: Right
    TextBox TextBox txtWednesday 8500 TextAlign: Right
    TextBox TextBox txtThursday 16800 TextAlign: Right
    TextBox TextBox txtFriday 17500 TextAlign: Right
    Button Button Generate btnGenerate  
  3. Double-click an unoccupied area of the form and change the file as follows:
      
    using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WeeklySales2
{
    public partial class Form1 : Form
    {
        Graphics graphDrawingArea;
        Bitmap bmpDrawingArea;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            bmpDrawingArea = new Bitmap(Width, Height);
            graphDrawingArea = Graphics.FromImage(bmpDrawingArea);
        }
    }
}
  4. Return to the form and click an empty area on it. In the Properties window, click the Events button Events
  5. Double-click the Paint field and implement its event as follows:
      
    private void Form1_Paint(object sender, PaintEventArgs e)
{
            e.Graphics.DrawImage(bmpDrawingArea, 0, 0);
}
  6. Return to the form and double-click the Generate button
  7. Implement its Click event as follows:
      
    private void btnGenerate_Click(object sender, EventArgs e)
{
            int monday = 0;
            int tuesday = 0;
            int wednesday = 0;
            int thursday = 0;
            int friday = 0;

            try
            {
                monday = int.Parse(txtMonday.Text) / 100;
            }
            catch (FormatException)
            {
                MessageBox.Show("Invalid value");
            }

            try
            {
                tuesday = int.Parse(txtTuesday.Text) / 100;
            }
            catch (FormatException)
            {
                MessageBox.Show("Invalid value");
            }

            try
            {
                wednesday = int.Parse(txtWednesday.Text) / 100;
            }
            catch (FormatException)
            {
                MessageBox.Show("Invalid value");
            }

            try
            {
                thursday = int.Parse(txtThursday.Text) / 100;
            }
            catch (FormatException)
            {
                MessageBox.Show("Invalid value");
            }

            try
            {
                friday = int.Parse(txtFriday.Text) / 100;
            }
            catch (FormatException)
            {
                MessageBox.Show("Invalid value");
            }

            graphDrawingArea.Clear(this.BackColor);

            graphDrawingArea.FillRectangle(new SolidBrush(Color.Red),
                    this.txtMonday.Left + 5,
                    280 - monday, 40, monday);
            graphDrawingArea.DrawRectangle(new Pen(Color.Black),
                    this.txtMonday.Left + 5,
                        280 - monday, 40, monday);
            graphDrawingArea.FillRectangle(new SolidBrush(Color.Blue),
                    this.txtTuesday.Left + 5,
                    280 - tuesday, 40, tuesday);
            graphDrawingArea.DrawRectangle(new Pen(Color.Black),
                    this.txtTuesday.Left + 5,
                        280 - tuesday, 40, tuesday);
            graphDrawingArea.FillRectangle(new SolidBrush(Color.Fuchsia),
                    this.txtWednesday.Left + 5,
                    280 - wednesday, 40, wednesday);
            graphDrawingArea.DrawRectangle(new Pen(Color.Black),
                    this.txtWednesday.Left + 5,
                    280 - wednesday, 40, wednesday);
            graphDrawingArea.FillRectangle(new SolidBrush(Color.Brown),
                    this.txtThursday.Left + 5,
                    280 - thursday, 40, thursday);
            graphDrawingArea.DrawRectangle(new Pen(Color.Black),
                    this.txtThursday.Left + 5,
                    280 - thursday, 40, thursday);
            graphDrawingArea.FillRectangle(new SolidBrush(Color.Turquoise),
                    this.txtFriday.Left + 5,
                    280 - friday, 40, friday);
            graphDrawingArea.DrawRectangle(new Pen(Color.Black),
                    this.txtFriday.Left + 5,
                        280 - friday, 40, friday);

            graphDrawingArea.DrawRectangle(new Pen(Color.Black),
                    10, 280, Width - 30, 1);
            Invalidate();
}
  8. Execute the application and test the form
     
     Weekly Sales
  9. After using it, close the form
 
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