在WinForm中通过HTTP协议向服务器端上传文件

在WinForm中通过HTTP协议向服务器端上传文件(5)             text2 = this.m_headers["Content-Type"];
            if (text2 != null)
            {
                  if (text2.ToLower(CultureInfo.InvariantCulture).StartsWith("multipart/"))
                  {
                        throw new WebException(SR.GetString("net_webclient_Multipart"));
                  }
            }
            else
            {
                  text2 = "application/octet-stream";
            }
            this.m_headers["Content-Type"] = "multipart/form-data; boundary=" + text1;
            this.m_responseHeaders = null;
            stream1 = new FileStream(fileName, FileMode.Open, FileAccess.Read);
            request1 = WebRequest.Create(this.GetUri(address));
            request1.Credentials = this.Credentials;