为什么没有办法生成透明的gif图像？？？

[DingHaiShenZhen]

我的代码如下：


Bitmap bitmap=new Bitmap(100,100);

Graphics g=Graphics.FromImage(bitmap);

g.Clear(Color.Transparent);

System.Drawing.Image image2 = System.Drawing.Image.FromFile("my1.gif");
g.DrawImage(image2,0,0,new Rectangle(0,0,width,height),GraphicsUnit.Pixel);
image2.Dispose();

bitmap.Save("my2.gif",ImageFormat.Gif);
bitmap.Dispose();
g.Dispose();

[angelior]

得重畫

[ruanyuping]

研究中.....

[TheAres]

Transparent Gifs with GDI+ / System.Drawing

http://www.aspalliance.com/chrisg/default.asp?article=142