以下是本人ＱＱ空间早期日记. 都是自己实际工作中用到的（分享一下）


申明wcf 服务
　

1. [WebMethod]
   
2. public void StoreFileAdvanced(string fileName, string fileNamex, byte[] data, int dataLength, string parameters, bool firstChunk, bool lastChunk, string path, int w, int h, string lei1, string lei2, string Pathparent)
   
3. {
   
4. string uploadFolder = Pathparent;
   
5. string tempFileName=fileName;//大文件名
   
6. string tempFileNamex=fileNamex;//小文件名
   
7. 
   
8. 
   
9. string webpath=@HostingEnvironment.ApplicationPhysicalPath;
   
10. 
    
11. string fileUrlPath = webpath + "/" + uploadFolder + "/" + path + "/" + DateTime.Now.ToString("yyyyMM");//文件要存储路径
    
12. if (firstChunk)
    
13. {
    
14. 
    
15. 
    
16. if (!Directory.Exists(fileUrlPath))
    
17. {
    
18. Directory.CreateDirectory(fileUrlPath); //创建文件夹
    
19. }
    
20. //Delete temp file
    
21. if (File.Exists(fileUrlPath + "/" + fileName))
    
22. File.Delete(fileUrlPath + "/" + fileName);
    
23. 
    
24. //Delete target file
    
25. if (File.Exists(fileUrlPath + "/" + fileNamex))
    
26. File.Delete(fileUrlPath + "/" + fileNamex);
    
27. 
    
28. }
    
29. 
    
30. 
    
31. FileStream fs = File.Open(fileUrlPath + "/" + fileName, FileMode.Append);
    
32. fs.Write(data, 0, dataLength);
    
33. fs.Close();
    
34. 
    
35. if (lastChunk)
    
36. {
    
37. if (w == 0 || h == 0)
    
38. {
    
39. 
    
40. }
    
41. else
    
42. {
    
43. if (tempFileName.IndexOf(".jpg") > -1 || tempFileName.IndexOf(".png") > -1 || tempFileName.IndexOf(".bmp") > -1 || tempFileName.IndexOf(".gif") > -1)
    
44. {
    
45. try
    
46. {
    
47. MakeThumbnail(fileUrlPath + "/" + tempFileName, fileUrlPath + "/" + tempFileNamex, w, h);
    
48. }
    
49. catch (Exception ex)
    
50. {
    
51. //Delete temp file
    
52. if (File.Exists(fileUrlPath + "/" + fileName))
    
53. File.Delete(fileUrlPath + "/" + fileName);
    
54. 
    
55. //Delete target file
    
56. if (File.Exists(fileUrlPath + "/" + fileNamex))
    
57. File.Delete(fileUrlPath + "/" + fileNamex);
    
58. MakeThumbnail(fileUrlPath + "/" + tempFileName, fileUrlPath + "/" + tempFileNamex, w, h);
    
59. }
    
60. }
    
61. }
    
62. }
    
63. 
    
64. }
    
65. 
    

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引用　wcf　服务

1. _client = new uploadSoapClient();
   
2. _client.StoreFileAdvancedCompleted += new EventHandler<System.ComponentModel.AsyncCompletedEventArgs>(_client_StoreFileAdvancedCompleted);
   
3. 
   
4. 　　 void _client_StoreFileAdvancedCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
   
5. {
   
6. //检查WEB服务是否存在错误
   
7. if (e.Error != null)
   
8. {
   
9. //当错误时放弃上传
   
10. _file.State = Constants.FileStates.错误;
    
11. }
    
12. else
    
13. {
    
14. //如果文件未取消上传的话，则继续上传
    
15. if (!_file.IsDeleted)
    
16. UploadAdvanced();
    
17. }
    
18. }
    
19. 
    
20. 　　private void UploadAdvanced()
    
21. {
    
22. // _file 这里是一个文件对像
    
23. byte[] buffer = new byte[4096*4];
    
24. int bytesRead = _file.FileStream.Read(buffer, 0, buffer.Length);
    
25. 
    
26. //文件是否上传完毕?
    
27. if (bytesRead != 0)
    
28. {
    
29. _dataSent += bytesRead;
    
30. 
    
31. if (_dataSent == _dataLength)
    
32. _lastChunk = true;//是否是最后一块数据
    
33. 
    
34. //上传当前数据块
    
35. _client.StoreFileAdvancedAsync(_file.FileName,_file.FileNamex, buffer, bytesRead, _initParams, _firstChunk, _lastChunk,_file.Path,_file.W,_file.H,_file.Lei1,_file.Lei2,_file.Pathparent);
    
36. 
    
37. 
    
38. //在第一条消息之后一直为false
    
39. _firstChunk = false;
    
40. 
    
41. //通知上传进度修改
    
42. OnProgressChanged();
    
43. }
    
44. else
    
45. {
    
46. //当上传完毕后
    
47. _file.FileStream.Dispose();
    
48. _file.FileStream.Close();
    
49. 
    
50. _client.ChannelFactory.Close();
    
51. }
    
52. 
    
53. }
    
54. 
    

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如果上传的是图片。关于生成缩微图

1. protected virtual void MakeThumbnail(string originalImagePath, string thumbnailPath, int width1, int height1)
   
2. {
   
3. System.Drawing.Image original_image = System.Drawing.Image.FromFile(originalImagePath);
   
4. 
   
5. 
   
6. 
   
7. // Calculate the new width and height
   
8. int width = original_image.Width;
   
9. int height = original_image.Height;
   
10. int target_width = width1;
    
11. int target_height = height1;
    
12. int new_width, new_height;
    
13. 
    
14. float target_ratio = (float)target_width / (float)target_height;
    
15. float image_ratio = (float)width / (float)height;
    
16. 
    
17. if (target_ratio > image_ratio)
    
18. {
    
19. new_height = target_height;
    
20. new_width = (int)Math.Floor(image_ratio * (float)target_height);
    
21. }
    
22. else
    
23. {
    
24. new_height = (int)Math.Floor((float)target_width / image_ratio);
    
25. new_width = target_width;
    
26. }
    
27. 
    
28. new_width = new_width > target_width ? target_width : new_width;
    
29. new_height = new_height > target_height ? target_height : new_height;
    
30. 
    
31. 
    
32. int paste_x = 0; //(target_width - new_width) / 2;
    
33. int paste_y = 0; //(target_height - new_height) / 2;
    
34. 
    
35. 
    
36. //新建一个bmp图片
    
37. System.Drawing.Image bitmap = new System.Drawing.Bitmap(new_width, new_height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
    
38. 
    
39. //新建一个画板
    
40. Graphics g = System.Drawing.Graphics.FromImage(bitmap);
    
41. 
    
42. //设置高质量插值法
    
43. g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
    
44. 
    
45. //设置高质量,低速度呈现平滑程度
    
46. g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
    
47. 
    
48. //清空画布并以透明背景色填充
    
49. g.Clear(System.Drawing.Color.White);
    
50. 
    
51. //在指定位置并且按指定大小绘制原图片的指定部分
    
52. g.DrawImage(original_image, paste_x, paste_y, new_width, new_height);
    
53. 
    
54. try
    
55. {
    
56. //以jpg格式保存缩略图
    
57. bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
    
58. }
    
59. catch (System.Exception e)
    
60. {
    
61. throw e;
    
62. }
    
63. finally
    
64. {
    
65. original_image.Dispose();
    
66. bitmap.Dispose();
    
67. g.Dispose();
    
68. }
    
69. }
    

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值得学习ing!