背景渐变

      关键词： 背景渐变、重写OnPaintBackground方法。

     GradientFill   class and the Win32Helper class可以在这找到

     The first thing I started with was to create a gradient background. I found that the best way achieving this would be to override OnPaintBackground in the Screen class. I found a very good article on how to do this on MSDN: How to display a gradient fill . I copied the GradientFill   class and the Win32Helper class into my project, I didn’t bother using the GradientFilledButton class since I only needed gradient for my background.

Then I override the OnPaintBackground in my Screen , giving me this Form :

1. using System .Drawing ;
2. using System .Windows .Forms ;
3.  
4. namespace GradientTransparentTest
5. {
6.     public partial class GradientTransparentForm : Form
7.     {
8.         public GradientTransparentForm( )
9.         {
10.             InitializeComponent( ) ;
11.         }
12.  
13.         // Paints the background of the form with a GradientFill pattern.
14.         protected override void OnPaintBackground( PaintEventArgs e)
15.         {
16.             GradientFill.Fill (
17.             e.Graphics , ClientRectangle,
18.             Color.Silver , Color.LightBlue ,
19.             GradientFill.FillDirection .LeftToRight ) ;
20.             e.Graphics .Dispose ( ) ;
21.         }
22.     }
23. }

This is what my simple Form with Gradient background looks like

 

参考资料：

  http://www.cnblogs.com/chy710/archive/2009/09/15/1567210.html

http://breathingtech.com/2009/creating-gradient-background-with-transparent-labels-in-net-compact-framework/