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;
    }