获取需要登录认证的远程数据

///获取远程xml信息
string strUrl = "www.xxx.com/get/2323";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strUrl);
request.Method = "post";
request.ContentType = "text/xml;charset=utf-8";
request.ContentLength = 0;
NetworkCredential cred = new NetworkCredential("用户名", "密码");
        request.Credentials = cred; //在信息请求头部加入验证信息，不然验证不通过
request.PreAuthenticate = true;
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream myResponseStream = response.GetResponseStream();
StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
string retString = myStreamReader.ReadToEnd();
myStreamReader.Close();
myResponseStream.Close();
Response.Write(retString);

//处理返回的xml
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;
}