ASP翻译成ASP.net

Function PostXmlWebOnline(paraXmlStr)
    On Error Resume Next
    Set objDom = CreateObject("Microsoft.XMLDOM")
    objDom.async = False
    objDom.loadXML paraXmlStr

    '判断XML数据是否装载成功
    If objDom.parseError.errorCode <> 0 Then
            tempErrorStr = objDom.parseError.reason
             PostXmlWebOnline = Replace(resXmlDataStr, tempReplaceStr, tempErrorStr)
             Exit Function
    Else
    Dim strURL
            Set http1 = CreateObject("Microsoft.XMLHTTP")
            strURL = "https://interface.gta-travel.com/gtaapi/RequestListenerServlet"
            http1.Open "Post", strURL, False
            http1.send objDom
            If http1.readyState <> 4 Or http1.Status = "404" Then
                tempErrorStr = "无法找到指定资源"
                PostXmlWebOnline = Replace(resXmlDataStr, tempReplaceStr, tempErrorStr)
                Exit Function
            End If

            resXmlDataStr = CStr(http1.responseText)
            Set http1 = Nothing
            PostXmlWebOnline = resXmlDataStr
   End If
End Function

那位可以帮我把这个段代码翻译成ASP.net,尤其是泛红部分，我不理解
谢谢了 --------------------编程问答-------------------- WebClient webClient=new WebClient(url);
webClient.DownloadString... --------------------编程问答-------------------- 不翻译了,给一个asp.net取html的方法你.

        

        /// <summary>

        /// 以POST方式抓取远程页面内容

        /// </summary>

        /// <param name="url"></param>

        /// <param name="postData">参数列表</param>

        /// <param name="encodeType"></param>

        /// <param name="err"></param>

        /// <returns></returns>

        public static string Post(string url, string postData, Encoding encoding)

        {

            try

            {

                HttpWebRequest request;

                HttpWebResponse response;



                string strResult = "";

                UTF8Encoding encodedData = new UTF8Encoding();

                byte[] byteArray = encodedData.GetBytes(postData);



                request = (HttpWebRequest)WebRequest.Create(url);

                request.Timeout = _iSetTimeOut;

                request.ReadWriteTimeout = _iSetTimeOut;

                request.ServicePoint.Expect100Continue = false;

                request.ServicePoint.UseNagleAlgorithm = false;



                request.Method = "POST";

                request.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*";

                request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727)";

                request.ContentType = "application/x-www-form-urlencoded;";

                request.ContentLength = byteArray.Length;



                Stream newStream = request.GetRequestStream();

                newStream.Write(byteArray, 0, byteArray.Length);

                newStream.Close();



                response = (HttpWebResponse)request.GetResponse();

                StreamReader sr = new StreamReader(response.GetResponseStream(), encoding);

                StringBuilder sb = new StringBuilder();

                sb.Append(sr.ReadToEnd());

                //while (!sr.EndOfStream)

                //{

                //    sb.Append(sr.ReadLine() + "\r\n");

                //}

                strResult = sb.ToString();



                response.Close();

                request = null;

                return strResult;

            }

            catch (WebException ex) { return ""; }

            catch (System.Net.Sockets.SocketException ex) { return ""; }

        }

--------------------编程问答-------------------- --------------------编程问答-------------------- --------------------编程问答--------------------

补充：.NET技术 ,  ASP.NET