繪制背景透明的圖檔,在有背景色的Form上顯示透明圖檔,這是.NET CF本身提供的方法,關鍵是最後一個參數。
//在有背景色的Form上顯示透明圖檔(事先準備背景透明的圖檔)
private void Form1_Paint(object sender, PaintEventArgs e)
{
Assembly asm = Assembly.GetExecutingAssembly();
Bitmap backgroundImage = new Bitmap(asm.GetManifestResourceStream("MyControl.TransparentImg.13.png"));
ImageAttributes attr = new ImageAttributes();
attr.SetColorKey(backgroundImage.GetPixel(0, 0), backgroundImage.GetPixel(0, 0));
e.Graphics.DrawImage(backgroundImage, new Rectangle(5, 5, 256, 256), 0, 0, 256, 256, GraphicsUnit.Pixel, attr);
}
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