代码如下:
Bitmap bmp = new Bitmap(@"D:\site\1.jpg");
Graphics g = Graphics.FromImage(bmp);
String str = name;
Font font = new Font("时尚中黑简体", size, FontStyle.Bold);
SolidBrush sbrush = new SolidBrush(Color.White);
g.DrawString(str, font, sbrush, new PointF(leftpadding, rightpadding));
bmp.Save(@"D:\site\2.jpg", System.Drawing.Imaging.ImageFormat.Bmp);
原图1.jpg为透明背景图片,但调用save保存后就变成白色背景了,可以实现保存后依旧为透明背景么