/// <summary>         /// 按指定的压缩质量及格式保存图片（微软的Image.Save方法保存到图片压缩质量为75)         /// </summary>         /// <param name="sourceImage">要保存的图片的Image对象</param>         /// <param name="savePath">图片要保存的绝对路径</param>         /// <param name="imageQualityValue">图片要保存的压缩质量，该参数的值为1至100的整数，数值越大，保存质量越好</param>         /// <returns>保存成功，返回true；反之，返回false</returns>         public bool SaveImageForSpecifiedQuality(System.Drawing.Image sourceImage, string savePath, int imageQualityValue)         {             //以下代码为保存图片时，设置压缩质量             EncoderParameters encoderParameters = new EncoderParameters();             EncoderParameter encoderParameter = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, imageQualityValue);             encoderParameters.Param[0] = encoderParameter;             try             {                 ImageCodecInfo[] ImageCodecInfoArray = ImageCodecInfo.GetImageEncoders();                 ImageCodecInfo jpegImageCodecInfo = null;                 for (int i = 0; i < ImageCodecInfoArray.Length; i++)                 {                     if (ImageCodecInfoArray[i].FormatDescription.Equals("JPEG"))                     {                         jpegImageCodecInfo = ImageCodecInfoArray[i];                         break;                     }                 }                    sourceImage.Save(savePath, jpegImageCodecInfo, encoderParameters);                               return true;             }             catch             {                 return false;             }         }

System.Drawing.Image image = System.Drawing.Image.FromFile("D:\\TestImage\\0.jpg"); SaveImageForSpecifiedQuality(image, "D:\\TestImage\\1.jpg", 100, ImageFormat.Jpeg);image.Dispose();