Create a green color with an alpha component then draw a green rectangle to the bitmap in memory : Bitmap : Graphics C# Source Code

Create a green color with an alpha component then draw a green rectangle to the bitmap in memory

    
 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

public class Form1 : Form {

    protected override void OnPaint(PaintEventArgs e) {
        Graphics gForm = e.Graphics;
        gForm.FillRectangle(Brushes.White, this.ClientRectangle);
        for (int i = 1; i <= 7; ++i) {
            Rectangle r = new Rectangle(i * 40 - 15, 0, 15,
                                        this.ClientRectangle.Height);
            gForm.FillRectangle(Brushes.Orange, r);
        }

        Bitmap bmp = new Bitmap(260, 260, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
        Graphics gBmp = Graphics.FromImage(bmp);

        Color green = Color.FromArgb(0x40, 0, 0xff, 0);
        Brush greenBrush = new SolidBrush(green);
        gBmp.FillRectangle(greenBrush, 10, 10, 140, 140);
        gForm.DrawImage(bmp, 20, 20, bmp.Width, bmp.Height);

        bmp.Dispose();
        gBmp.Dispose();
        greenBrush.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

 
    
   
  
   

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• Draw on an Bitmap
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• Resize the Bitmap using the highest quality interpolation mode
• Create Graphics object From Image
• Bitmap.SetResolution
• Bitmap property
• Create your own BitMap
• Draw shapes to the bitmap in memory
• new Bitmap(bitmap, size)
• Read Bitmap Size by using BinaryReader
• Bitmap.HorizontalResolution
• Use a color matrix to change the color properties of the image
• Create a Bitmap image in memory and set its CompositingMode
• Create a red color with an alpha component then draw a red circle to the bitmap in memory
• write the pixel information to the console window
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