Bitmap.MakeTransparent( ); : Bitmap « System.Drawing « C# / C Sharp by API






Bitmap.MakeTransparent( );

  
      

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace BitmapOther_c
{
    /// <summary>
    /// Summary description for BitmapOther.
    /// </summary>
  public class BitmapOther : System.Windows.Forms.Form
  {
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.Container components = null;

    public BitmapOther()
    {
      //
      // Required for Windows Form Designer support
      //
      InitializeComponent();

      //
      // TODO: Add any constructor code after InitializeComponent call
      //
    }

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    protected override void Dispose( bool disposing )
    {
      if( disposing )
      {
        if (components != null) 
        {
          components.Dispose();
        }
      }
      base.Dispose( disposing );
    }

        #region Windows Form Designer generated code
    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
      // 
      // BitmapOther
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Name = "BitmapOther";
      this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
      this.Text = "BitmapOther";
      this.Load += new System.EventHandler(this.BitmapOther_Load);

    }
        #endregion

    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main() 
    {
      Application.Run(new BitmapOther());
    }

    private void BitmapOther_Load(object sender, System.EventArgs e)
    {
    
    }

    protected override void OnPaint ( PaintEventArgs e )
    {
      Bitmap BMP = new Bitmap("Colorbars.JPG");
      Point Pt = new Point(20,20);

   //   BMP.SetPixel(15,20,Color.Black);
      BMP.MakeTransparent( BMP.GetPixel(15,25) );

      e.Graphics.DrawImage(BMP, Pt);
      e.Graphics.DrawLine(new Pen(Brushes.GreenYellow,30),60,60,200,60);


      
    }
   }
    }

   
    
  








Related examples in the same category

1.new Bitmap(String fileName)
2.Bitmap.CompositingMode
3.Bitmap.Height
4.Bitmap.HorizontalResolution
5.Bitmap.PhysicalDimension
6.Bitmap.PixelFormat
7.Bitmap.RawFormat
8.Bitmap.SetResolution(600f, 600f);
9.Bitmap.Size
10.Bitmap.Width