/// <summary>

    /// 验证结果

    /// </summary>

    /// <param name="url">要验证的http地址</param>

    protected string VeriRel(string url)

    {

        string rel = "";

        try

        {

            WebRequest myReq = WebRequest.Create(url);

            string username = "----@yahoo.com.cn";  //账号

            string password = "******"; //密码  //注意这里的格式哦，为 "username:password" 

            string usernamePassword = username + ":" + password; 

            CredentialCache mycache = new CredentialCache(); 

            mycache.Add(new Uri(url), "Basic", new NetworkCredential(username, password)); 

            myReq.Credentials = mycache; 

            myReq.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(new ASCIIEncoding().GetBytes(usernamePassword))); 

            WebResponse wr = myReq.GetResponse(); 

            Stream receiveStream = wr.GetResponseStream(); 

            StreamReader reader = new StreamReader(receiveStream, Encoding.UTF8);

            rel  = reader.ReadToEnd(); 

        }

        catch (Exception ex)

        { }

        return rel;