if (level < 1 || level > 99)
                throw new ArgumentException("壓縮等級(jí)值范圍在0~100之間");
            long[] quality = new long[1];
            quality[0] = level;
            using (EncoderParameters Parameters = new EncoderParameters())
            {
                using (EncoderParameter Parameter = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality))
                {
                    Parameters.Param[0] = Parameter;
                    source.Save(path, ImageCodecInfo.GetImageEncoders()[1], Parameters);

                }
            }