1     private void PostFile(string url,byte[] data,string fileName)
 2     {
 3 
 4         string path = Server.MapPath("/");
 5 
 6         string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x"); 
 7         StringBuilder sb = new StringBuilder();
 8         sb.Append("--" + boundary);
 9         sb.Append("\r\n");
10         sb.Append("Content-Disposition: form-data; name=\"image\"; filename=\"" + path +fileName+ "\"");
11         sb.Append("\r\n");
12         sb.Append("Content-Type: image/pjpeg");
13         sb.Append("\r\n\r\n");
14 
15         string head = sb.ToString();
16 
17 
18 
19         byte[] form_data = Encoding.UTF8.GetBytes(head);
20         //结尾 
21         byte[] foot_data = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n"); 
22 
23 
24         string pwd = System.Configuration.ConfigurationManager.AppSettings["imgserverpwd"].ToString();
25         HttpWebRequest HRQ = (HttpWebRequest)System.Net.WebRequest.Create(url + "?filename=" + fileName + "&p=" + pwd);        
26         HRQ.Method = "POST";
27         HRQ.KeepAlive = false;
28         HRQ.ContentType = "multipart/form-data";
29         HRQ.Timeout = 10 * 1000;
30         HRQ.ContentLength = form_data.Length + data.Length + foot_data.Length;
31         //HRQ.ContentLength = data.Length;
32         
33 
34         Stream sr = HRQ.GetRequestStream();
35         sr.Write(form_data, 0, form_data.Length);
36         sr.Write(data, 0, data.Length);
37         sr.Write(foot_data, 0, foot_data.Length);
38 
39 
40         HttpWebResponse RES = (HttpWebResponse)HRQ.GetResponse();
41         
42   
43         if (HRQ.HaveResponse)
44         {
45             Stream Rs = RES.GetResponseStream();                      
46             StreamReader RsRead = new StreamReader(Rs);
47             Response.Write(RsRead.ReadToEnd());
48         }
49         else
50         {
51             Response.Write("<p>" + url + ":<span style=\"color:#f00\">失败</span></p>");            
52         }
53         sr.Close();
54         sr.Dispose();
55     }

您的主机中的软件放弃了一个已建立的连接。

说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 

异常详细信息: System.Net.Sockets.SocketException: 您的主机中的软件放弃了一个已建立的连接。

源错误: 

行 96:         sr.Write(form_data, 0, form_data.Length);
行 97:         sr.Write(data, 0, data.Length);
行 98: sr.Write(foot_data, 0, foot_data.Length); 行 99: 
行 100:

源文件: g:\upl\upload\index.aspx.cs    行: 98 

堆栈跟踪: 

[SocketException (0x2745): 您的主机中的软件放弃了一个已建立的连接。]
   System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags) +5390724
   System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size) +131

[IOException: 无法将数据写入传输连接: 您的主机中的软件放弃了一个已建立的连接。。]
   System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size) +294
   System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) +26
   System.Net.ConnectStream.InternalWrite(Boolean async, Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state) +1308
   System.Net.ConnectStream.Write(Byte[] buffer, Int32 offset, Int32 size) +105
   upload_index.PostFile(String url, Byte[] data, String fileName) in g:\upl\upload\index.aspx.cs:98
   upload_index.TransportFile(HttpPostedFile File) in g:\upl\upload\index.aspx.cs:49
   upload_index.Page_Load(Object sender, EventArgs e) in g:\upl\upload\index.aspx.cs:24
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627