压缩图片

1. /// <summary>
2. /// 压缩图片
3. /// </summary>
4. /// <param name="filePath">要压缩的图片的路径</param>
5. /// <param name="filePath_ystp">压缩后的图片的路径</param>
6. public void ystp(string filePath, string filePath_ystp)
7. {
8. //Bitmap
9. Bitmap bmp = null;
11. //ImageCoderInfo
12. ImageCodecInfo ici = null;
14. //Encoder
15. Encoder ecd = null;
17. //EncoderParameter
18. EncoderParameter ept = null;
20. //EncoderParameters
21. EncoderParameters eptS = null;
23. try
24. {
25. bmp = new Bitmap(filePath);
27. ici = this.getImageCoderInfo("image/jpeg");
29. ecd = Encoder.Quality;
31. eptS = new EncoderParameters(1);
33. ept = new EncoderParameter(ecd, 10L);
34. eptS.Param[0] = ept;
35. bmp.Save(filePath_ystp, ici, eptS);
36. }
37. catch (Exception ex)
38. {
39. throw new Exception(ex.Message);
40. }
41. finally
42. {
43. bmp.Dispose();
45. ept.Dispose();
47. eptS.Dispose();
48. }
49. }
51. /// <summary>
52. /// 获取图片编码类型信息
53. /// </summary>
54. /// <param name="coderType">编码类型</param>
55. /// <returns>ImageCodecInfo</returns>
56. private ImageCodecInfo getImageCoderInfo(string coderType)
57. {
58. ImageCodecInfo[] iciS = ImageCodecInfo.GetImageEncoders();
60. ImageCodecInfo retIci = null;
62. foreach (ImageCodecInfo ici in iciS)
63. {
64. if (ici.MimeType.Equals(coderType))
65. retIci = ici;
66. }
68. return retIci;
69. }
71. #endregion 压缩图片