Image img = Image.FromFile(filename);
// Assumes myImage is the PNG you are converting
using (var b = new Bitmap(img
.Width, img
.Height)) {
b.SetResolution(img
.HorizontalResolution, img
.VerticalResolution);
using (var g = Graphics.FromImage(b)) {
g.Clear(Color.White);
g.DrawImageUnscaled(img
, 0, 0);
}
// Now save b as a JPEG like you normally would
b.Save(@路径, System.Drawing.Imaging.ImageFormat.Jpeg);
}
亲测可用
原文链接 https://stackoverflow.com/questions/6513633/convert-transparent-png-to-jpg-with-non-black-background-colo