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ImageCodecInfo[] MyInfos = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo InfoPNG = MyInfos[0];
for (int i = 0; i < MyInfos.Length; i++)
{
if (MyInfos[i].FormatDescription == "PNG ")
{
InfoPNG = MyInfos[i];
}
}
System.Drawing.Imaging.Encoder MyEncoder = System.Drawing.Imaging.Encoder.ColorDepth;
EncoderParameters MyParams = new EncoderParameters();
EncoderParameter MyParam = new EncoderParameter(MyEncoder, 8L);
MyParams.Param[0] = MyParam;
Bitmap.Save(文件名, InfoPNG, MyParams);