此页的状态信息无效,可能已损坏的处理办法及原因分析

    public string exec_url(string url)
    {

        string result = "1";
        WebRequest request = WebRequest.Create(url);
        try
        {
            request.Timeout = 20000;//20秒超时
            WebResponse respOnse= request.GetResponse();

            Stream resStream = response.GetResponseStream();
            StreamReader sr = new StreamReader(resStream);
            result = sr.ReadToEnd();
            sr.Close();
            resStream.Close();
        }
        catch
        {
            return "1";
        }
        return result;

    }