盗取万网的就可以比方用下面的办法获得远程的URL,再用正则判断一下    public String Get_Http(String a_strUrl, int timeout)
    {
        string strResult;
        try
        {            HttpWebRequest myReq = (HttpWebRequest)HttpWebRequest.Create(a_strUrl);
            myReq.Timeout = timeout;
            HttpWebResponse HttpWResp = (HttpWebResponse)myReq.GetResponse();
            Stream myStream = HttpWResp.GetResponseStream();
            StreamReader sr = new StreamReader(myStream, Encoding.Default);
            StringBuilder strBuilder = new StringBuilder();
            while (-1 != sr.Peek())
            {
                strBuilder.Append(sr.ReadLine());
            }            strResult = strBuilder.ToString();
        }
        catch (Exception exp)
        {            strResult = "错误:" + exp.Message;
        }        return strResult;
    }