make image transparency - c#如何调整图片透明度答:Bitmap resultImage = new Bitmap(srcImage.Width, srcImage.Height);Graphics g = Graphics.FromImage(resultImage);g.DrawImage( srcImage, new Rectangle( 0, 0, srcImage.Width, srcImage.Height ), 0, 0, srcImage.Width, srcImage.Height, GraphicsUnit.Pixel, attributes);//resultImage就...