private void CompressedImage(string fileName, long quality)        {            FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);            Byte[] bytePic = new Byte[fs.Length];            fs.Read(bytePic, 0, bytePic.Length);            MemoryStream stream = new MemoryStream(bytePic);            Bitmap bmp = (Bitmap)Image.FromStream(stream);            ImageCodecInfo myImageCodecInfo = ImageCodecInfo.GetImageEncoders()[1];  //如果下面遍历没有这种图片格式，就默认为jpeg            ImageCodecInfo[] encoders = ImageCodecInfo.GetImageEncoders();            for (int j = 0; j < encoders.Length; j++)            {                if (encoders[j].MimeType == "image/jpeg")                {                    myImageCodecInfo = encoders[j];                    break;                }            }            System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality;  //要操作的是质量            EncoderParameters myEncoderParameters = new EncoderParameters(1);      //一个成员，只处理质量            EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, quality);    //0为最差质量,100为最好，注意是long类型            myEncoderParameters.Param[0] = myEncoderParameter;            Size s = new Size(bmp.Width, bmp.Height);            Bitmap newBmp = new Bitmap(bmp, s);            MemoryStream ms = new MemoryStream();            newBmp.Save(ms, myImageCodecInfo, myEncoderParameters);    //压缩后的流保存到ms            //从流中还原图片            Image image = Image.FromStream(ms);            string curDirectory = Path.GetDirectoryName(Assembly.GetCallingAssembly().GetModules()[0].FullyQualifiedName) + "\\";            //保存图片            image.Save(curDirectory + "pic.jpg");            fs.Dispose();            stream.Dispose();            newBmp.Dispose();            ms.Dispose();        }