求大神帮忙看看代码，这个是在wince用HttpWebRequest上传文件，提示上传失败

using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

using System.Net;

using System.Windows.Forms;



namespace frmBaQDemo

{

    class uploadfile

    {

        public uploadfile()

        {



        }

        /// <summary> 

        /// 将本地文件上传到指定的服务器(HttpWebRequest方法) 

        /// </summary> 

        /// <param name="address">文件上传到的服务器</param> 

        /// <param name="fileNamePath">要上传的本地文件（全路径）</param> 

        /// <param name="saveName">文件上传后的名称</param> 

        /// <returns>成功返回1，失败返回0</returns>

        public int Upload_Request(string address, string fileNamePath, string saveName)

        {

             int returnValue = 0;

             // 要上传的文件

            FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);

            BinaryReader r = new BinaryReader(fs);

            //时间戳

            string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");

            byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "\r\n");

            //请求头部信息

            StringBuilder sb = new StringBuilder();

            sb.Append("--");

            sb.Append(strBoundary);

            sb.Append("\r\n");

            sb.Append("Content-Disposition: form-data; name=\""); 

            sb.Append("file");

            sb.Append("\"; filename=\""); 

            sb.Append(saveName);

            sb.Append("\"");

            sb.Append("\r\n");

            sb.Append("Content-Type: ");

            sb.Append("application/octet-stream");

            sb.Append("\r\n");

            sb.Append("\r\n");

            string strPostHeader = sb.ToString();

            byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader);

            // 根据uri创建HttpWebRequest对象

            HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));

            httpReq.Method = "POST";

            //对发送的数据不使用缓存

            httpReq.AllowWriteStreamBuffering = false;

            //设置获得响应的超时时间（300秒）

            httpReq.Timeout = 300000;

            httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;

            long length = fs.Length + postHeaderBytes.Length + boundaryBytes.Length;

            long fileLength = fs.Length;

            httpReq.ContentLength = length;

            try

            {

             //每次上传4k

                 int bufferLength = 4096;

                 byte[] buffer = new byte[bufferLength];

                 //已上传的字节数

                 long offset = 0;

                //开始上传时间

                DateTime startTime = DateTime.Now;

                int size = r.Read(buffer, 0, bufferLength);

                Stream postStream = httpReq.GetRequestStream();

                //发送请求头部消息

                postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);

                while (size > 0)

                {

                    postStream.Write(buffer, 0, size);

                    offset += size;

                    Application.DoEvents();

                    size = r.Read(buffer, 0, bufferLength);

                 }

                 //添加尾部的时间戳

                 postStream.Write(boundaryBytes, 0, boundaryBytes.Length);

                 postStream.Close();

                    //获取服务器端的响应

                 WebResponse webRespon = httpReq.GetResponse();

                 Stream s = webRespon.GetResponseStream();

                 StreamReader sr = new StreamReader(s);

                    //读取服务器端返回的消息

                 String sReturnString = sr.ReadLine();

                 s.Close();

                 sr.Close();

                 if (sReturnString == "Success")

                 {

                        returnValue = 1;

                 }

                 else if (sReturnString == "Error")

                 {

                        returnValue = 0;

                  }

            }

            catch

            {

                returnValue = 0;

            }

            finally

            {

                fs.Close();

                r.Close();

            }

            return returnValue;

        }



    }

}

补充：.NET技术 ,  C#

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