Jpg保存图片确认质量

 1      Jpg保存图片确认质量#region Jpg保存图片确认质量
 2        /**//**/
 3        /**//// <summary>
 4        /// 保存JPG时用
 5        /// </summary>
 6        /// <param name="mimeType"></param>
 7        /// <returns>得到指定mimeType的ImageCodecInfo</returns>
 8        private static ImageCodecInfo GetCodecInfo(string mimeType)
 9        {
10            ImageCodecInfo[] CodecInfo = ImageCodecInfo.GetImageEncoders();
11            foreach (ImageCodecInfo ici in CodecInfo)
12            {
13                if (ici.MimeType == mimeType) return ici;
14            }
15            return null;
16        }
17
18
19        /**//**/
20        /**//// <summary>
21        /// 保存为JPEG格式，支持压缩质量选项
22        /// </summary>
23        /// <param name="bmp"></param>
24        /// <param name="FileName"></param>
25        /// <param name="Qty">1~100</param>
26        /// <returns></returns>
27        public void SaveAsJPEG(Image bmp, string FileName, int Qty)
28        {
29            try
30            {
31                EncoderParameter p;
32                EncoderParameters ps;
33
34                ps = new EncoderParameters(1);
35
36                p = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, Qty);
37                ps.Param[0] = p;
38
39                bmp.Save(FileName, GetCodecInfo("image/jpeg"), ps);
40
41
42            }
43            catch
44            {
45
46            }
47
48        }