C#图片无损压缩

使用C#压缩图片
下列代码为使用byte字节数组压缩
注释的是使用文件路径

 /// <summary>
        /// 压缩图片
        /// </summary>
        /// <param name="buffer">图片数据</param>
        /// <param name="outPath">保存位置</param>
        /// <param name="flag">图片质量</param>
        /// <returns></returns>
        public static bool ReduceImage(byte[] buffer ,string outPath, int flag)
        {
            
            MemoryStream ms = new MemoryStream(buffer);//使用byte
            Image iSource = Image.FromStream(ms);//如果使用路径 就用下面一个
            //Image iSource = Image.FromFile(path);
            ImageFormat tFormat = iSource.RawFormat;
            EncoderParameters ep = new EncoderParameters();
            long[] qy = new long[1];
            qy[0] = flag;
            EncoderParameter eParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qy);
            ep.Param[0] = eParam;
            try
            {
                ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageDecoders();
                ImageCodecInfo jpegICIinfo = null;
                for (int x = 0; x < arrayICI.Length; x++)
                {
                    if (arrayICI[x].FormatDescription.Equals("JPEG"))
                    {
                        jpegICIinfo = arrayICI[x];
                        break;
                    }
                }
                if (jpegICIinfo != null)
                    iSource.Save(outPath, jpegICIinfo, ep);
                else
                    iSource.Save(outPath, tFormat);
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
            finally
            {
                iSource.Dispose();
            }
        }