C# 客户端远程访问IIS服务器出现:远程服务器返回错误: (404) 未找到。

C# 客户端远程访问IIS服务器出现:远程服务器返回错误: (404) 未找到。但是服务器端可以访问URL:http://192.168.2.179:8081/webform.aspx,请问这是什么原因?

 private void upload_Click(object sender, System.EventArgs e)
        {
            try
            {
                //上传服务器的地址(web服务)
                string address = "http://192.168.2.179:8081/Default.aspx";
                //上传后文件保存的名称
                string saveName = DateTime.Now.ToString("yyyyMMddHHmmss");
                int count = UpSound_Request(address, filePath, saveName, this.progressBar1);
                if (count > 0)
                {
                    MessageBox.Show("上传文件成功!");
                }
                else
                {
                    MessageBox.Show("上传文件失败!");
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("" + ex.GetBaseException());
            }
        }

         /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="address">文件上传到服务器的路径</param>
        /// <param name="fileNamePath">要上传的本地路径(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2</returns>
        public int UpSound_Request(string address, string fileNamePath, string saveName, ProgressBar progressBar)
        {
            int returnValue = 0;
            //要上传的文件
            FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
            //二进制对象
            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");
            //请求的头部信息
            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
            {
                progressBar.Maximum = int.MaxValue;
                progressBar.Minimum = 0;
                progressBar.Value = 0;
                //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;
                    progressBar.Value = (int)(offset * (int.MaxValue / length));
                    TimeSpan span = DateTime.Now - startTime;
                    double second = span.TotalSeconds;
                    labTime.Text = "已用时:" + second.ToString("F2") + "秒";
                    if (second > 0.001)
                    {
                        labSpeed.Text = "平均速度:" + (offset / 1024 / second).ToString("0.00") + "KB/秒";
                    }
                    else
                    {
                        labSpeed.Text = " 正在连接…";
                    }
                    labState.Text = "已上传:" + (offset * 100.0 / length).ToString("F2") + "%";
                    labSize.Text = (offset / 1048576.0).ToString("F2") + "M/" + (fileLength / 1048576.0).ToString("F2") + "M";
                    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();

                WebResponse webRespon;

                try
                {
                    webRespon = httpReq.GetResponse() as WebResponse;
                }
                catch (WebException ex)
                {
                    webRespon = ex.Response as WebResponse;
                }


                Stream s = webRespon.GetResponseStream();
                //读取服务器端返回的消息  
                StreamReader sr = new StreamReader(s);
                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;
        }

    }
        ![图片说明](https://img-ask.csdn.net/upload/201908/24/1566628122_433652.png)

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Elen005
Elen005
2019/08/24 14:30
  • c#
  • asp.net
  • microsoft
  • visual studio
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