DHL: linqToxml 解析xml值

            StringBuilder st = new StringBuilder();
            st.Append("<req cmd=\"push_ticket\">");
            st.Append("<ticket tid=\"30001001\">");
            st.Append("<userid>001</userid> ");
            st.Append("<caller>13241856009</caller>");
            st.Append("<callerid>01</callerid>");
            st.Append("<called>13141543311</called>");
            st.Append("<calledid>11</calledid>");
            st.Append("<priceid>1</priceid>");
            st.Append("<feemode>扣用户</feemode>");
            st.Append("<calllen>30</calllen>");
            st.Append("<starttime>2009-09-11 09:01:01<starttime>");
            st.Append("<pid>PingCo</pid>");
            st.Append("<cpid>PingCoI</cpid>");
            st.Append("</ticket></req>");
            string newVariable = url.VirtualPathUrl+ "/Default.aspx";
            HttpHelper.Post(newVariable, st.ToString(), Encoding.UTF8);

/// <summary>
        /// post指定内容到指定URL
        /// </summary>
        /// <param name="url">post的地址</param>
        /// <param name="content">post的内容</param>
        /// <param name="encode">编码</param>
        /// <returns>返回响应的数据</returns>
        public static string Post(string url, string content, Encoding encode)
        {
            try
            {
                var httpRequest = (HttpWebRequest)WebRequest.Create(url);
                httpRequest.Method = "POST";
                var byteArray = encode.GetBytes(content);
                httpRequest.ContentType = "application/x-www-form-urlencoded";
                httpRequest.ContentLength = byteArray.Length;
                var dataStream = httpRequest.GetRequestStream();
                dataStream.Write(byteArray, 0, byteArray.Length);
                dataStream.Close();

                //接收返回的字符串
                var response = (HttpWebResponse)httpRequest.GetResponse();
                var receiveStream = response.GetResponseStream();
                var readStream = new StreamReader(receiveStream, encode);
                var ret = readStream.ReadToEnd();
                readStream.Close();
                return ret;
            }
            catch (Exception exception)
            {
                ILog log = LogManager.GetLogger("HttpHelper");
                //记录错误信息日志
                log.Error(string.Format("Post数据出错:{0},PostUrl:{1},PostContent:{2}", exception, url, content));
                return "<resp ret=\"0\"></resp>";
            }

        }

var sr = new StreamReader(Request.InputStream);
                string xmlStr = sr.ReadToEnd();
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.LoadXml(xmlStr);
                //log.Info(xmlStr);
                XElement elemet = XElement.Parse(xmlStr);
                log.Info(String.Format("Linq:{0}", elemet.Attribute("tid").Value)); //获取属性
                log.Info("Linq2:" + elemet.Element("ticket").Element("caller"));//获取节点值