使用XML与远程服务器进行交互

最近在做的一个项目其中的一部分是与远程服务器进行交互，确定身份验证的合法性，于是编写了SendRequest方法

此方法发送给远程服务器XML请求，服务器经过处理后，返回XML回应，由此方法接收到后进行返回。

 protected string SendRequest(string strXML) {
     string str = ""; //双方协定的XML格式
     Encoding encoding = Encoding.UTF8; //接收页面　　　　　　　
     string strUrl = "http://localhost:14360/WebSite16/Handler.ashx";
     byte[] data = encoding.GetBytes(strXML); //准备请求...
     HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(strUrl);
     myRequest.Method = "POST";
     myRequest.ContentType = "text/xml;charset=utf-8";
     myRequest.ContentLength = data.Length; //身份认证，特别注意，参数用户名，密码
     NetworkCredential cred = new NetworkCredential("wcadmin", "wcadmin");
     myRequest.Credentials = cred; //在信息请求头部加入验证信息，不然验证不通过
     myRequest.PreAuthenticate = true;
     Stream newStream = myRequest.GetRequestStream(); //发送数据
     newStream.Write(data, 0, data.Length);
     newStream.Close();
     WebResponse response = myRequest.GetResponse();
     Stream resStream = response.GetResponseStream();
     StreamReader sr = new StreamReader(resStream, System.Text.Encoding.UTF8);
     str = sr.ReadToEnd();//接收返回值，返回值可以是xml
     resStream.Close();
     sr.Close();
     return str;
 }

解析返回的XML的方法如下代码片段：

 public bool CheckUser(string token) {
     bool flag = false;  //验证成功与否的标识
     //向服务器发出验证XML信息
     string requestXML = "";
     requestXML = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><ecity><msgname>XXXXXX</msgname><msgversion>1.0.0</msgversion><transactionid>000000</transactionid><timestamp>"
         + DateTime.Now.ToString("yyyyMMddhhmmss") + "</timestamp><msgsender>abc</msgsender><svccont><token>"+token+"</token></svccont></ecity>";

     //发送验证的XML并获取返回的XML信息
     string responseXML = "";
     responseXML= SendRequest(requestXML);

     //解析XML信息
     XmlDocument xmlDoc = new XmlDocument();
     xmlDoc.LoadXml(responseXML);
     XmlNodeList nodes = xmlDoc.SelectNodes("/ecity/msgname");
     if (nodes.Count > 0)
     {
         //首先判断是否接口正确
         if (nodes[0].InnerText.Trim().ToLower() == "getuserinforesp")
         {
             nodes = xmlDoc.SelectNodes("/ecity/result/rspcode");
             if (nodes.Count > 0)
             {
                 //表示验证通过
                 if (nodes[0].InnerText.Trim() == "0")
                 {
                     flag = true;
                 }
             }
         }
     }

     return flag;
 }

转自：http://www.cnblogs.com/shunyao8210/archive/2011/09/19/2181075.html