winform通过HttpWebRequest（post方式）上传文件和传递参数

  1  private void button1_Click(object sender, EventArgs e)
  2         {
  3             UploadFileHttpRequest(AppDomain.CurrentDomain.BaseDirectory.Trim() + "bb.txt");
  4         }
  5         private string UploadFileHttpRequest(string fileName)
  6         {
  7             string output = string.Empty;
  8             MemoryStream postStream = null;
  9             BinaryWriter postWriter = null;
 10             HttpWebResponse response = null;
 11             StreamReader responseStream = null;
 12 
 13             const string CONTENT_BOUNDARY = "----------ae0cH2cH2GI3Ef1KM7GI3Ij5cH2gL6";
 14             const string CONTENT_BOUNDARY_PREFIX = "--";
 15 
 16             try
 17             {
 18                 UriBuilder uriBuilder = new UriBuilder("http://localhost:7408/WebT/t.aspx");
 19                 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uriBuilder.Uri);
 20                 request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; Maxthon; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";
 21                 request.Timeout = 300000;
 22                 request.ContentType = "multipart/form-data; boundary=" + CONTENT_BOUNDARY;
 23                 postStream = new MemoryStream();
 24                 postWriter = new BinaryWriter(postStream);
 25                 //-- 参数
 26                 //param['setType']
 27                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(CONTENT_BOUNDARY_PREFIX + CONTENT_BOUNDARY + "\r\n" +
 28                 "Content-Disposition: form-data; name=\"param['setType']\" \r\n\r\n"));
 29                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("2"));
 30                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("\r\n"));
 31                 //param['startTime']
 32                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(CONTENT_BOUNDARY_PREFIX + CONTENT_BOUNDARY + "\r\n" +
 33                 "Content-Disposition: form-data; name=\"param['startTime']\" \r\n\r\n"));
 34                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(""));
 35                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("\r\n"));
 36                 //param['endTime']
 37                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(CONTENT_BOUNDARY_PREFIX + CONTENT_BOUNDARY + "\r\n" +
 38                 "Content-Disposition: form-data; name=\"param['endTime']\" \r\n\r\n"));
 39                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(""));
 40                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("\r\n"));
 41                 //param['resourceID']
 42                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(CONTENT_BOUNDARY_PREFIX + CONTENT_BOUNDARY + "\r\n" +
 43                 "Content-Disposition: form-data; name=\"param['resourceID']\" \r\n\r\n"));
 44                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("1398130"));
 45                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("\r\n"));
 46                 //forwardUrl
 47                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(CONTENT_BOUNDARY_PREFIX + CONTENT_BOUNDARY + "\r\n" +
 48                 "Content-Disposition: form-data; name=\"forwardUrl\" \r\n\r\n"));
 49                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("/cs/showBatchToneInfoStart.action"));
 50                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("\r\n"));
 51                 //uploadFiles
 52                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(CONTENT_BOUNDARY_PREFIX + CONTENT_BOUNDARY + "\r\n" +
 53                 "Content-Disposition: form-data; name=\"uploadFiles\" \r\n\r\n"));
 54                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(fileName));
 55                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("\r\n"));
 56                 byte[] fileContent = File.ReadAllBytes(fileName);
 57                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(CONTENT_BOUNDARY_PREFIX + CONTENT_BOUNDARY + "\r\n" +
 58                 "Content-Disposition: form-data; name=\"FileContent\" " +
 59                 "filename=\"" + Path.GetFileName(fileName) + "\"\r\n\r\n"));
 60                 postWriter.Write(fileContent);
 61                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes("\r\n"));
 62                 postWriter.Write(Encoding.GetEncoding("gb2312").GetBytes(CONTENT_BOUNDARY_PREFIX + CONTENT_BOUNDARY + "--"));
 63 
 64                 request.ContentLength = postStream.Length;
 65                 request.Method = "POST";
 66                 Stream requestStream = request.GetRequestStream();
 67                 postStream.WriteTo(requestStream);
 68                 response = (HttpWebResponse)request.GetResponse();
 69 
 70                 for (int i = 0; i < response.Headers.Count; i++)
 71                 {
 72                     output += response.Headers.Keys[i] + ": " + response.GetResponseHeader(response.Headers.Keys[i]) + "\r\n";
 73                 }
 74                 Encoding enc = Encoding.GetEncoding("gb2312");
 75 
 76                 try
 77                 {
 78                     if (response.ContentEncoding.Length > 0) enc = Encoding.GetEncoding(response.ContentEncoding);
 79                 }
 80                 catch { }
 81                 responseStream = new StreamReader(response.GetResponseStream(), enc);
 82                 output += "\r\n\r\n\r\n" + responseStream.ReadToEnd();
 83             }
 84             finally
 85             {
 86                 if (postWriter != null) postWriter.Close();
 87                 if (postStream != null)
 88                 {
 89                     postStream.Close();
 90                     postStream.Dispose();
 91                 }
 92                 if (response != null) response.Close();
 93                 if (responseStream != null)
 94                 {
 95                     responseStream.Close();
 96                     responseStream.Dispose();
 97                 }
 98             }
 99             return output;
100         }