各位大佬，进来帮我看看图片压缩问题啊。。。。
Image jpgPic =Image.FromFile(tempath);
EncoderParameters ep=new EncoderParameters(1);
EncoderParameter ep1=new EncoderParameter(System.Drawing.Imaging.Encoder.Quality,30);
ep.Param[0]=ep1;
ImageCodecInfo imageinfo=GetCodecInfo("image/jpeg");
string savepath=tempath.Substring(0,tempath.LastIndexOf(@"\"))+@"\myNewPic.JPG";
Bitmap jpgImage =new Bitmap(jpgPic);
jpgPic.Dispose();
jpgImage.Save(savepath, imageinfo, ep);//这里报 参数无效！！！！！烦死

[解决办法]