HtmlAgilityPack使用

http://stackoverflow.com/questions/5876825/htmlagilitypack-and-timeouts-on-load

http://stackoverflow.com/questions/12468497/how-can-i-add-a-webrequest-to-set-timeout-when-loading-a-url-to-document-in-html

stackoverflow是个好网站，什么问题都能搜，多多利用

针对加载超时、网页编码问题，总结以上三个网址，可以先用 HttpWebRequest 获取一遍，设置相关属性，然后再加载操作

String Data = GetURLData(url);
    HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
    doc.LoadHtml(Data);

    public static string GetURLData(string URL)
    {
        try
        {
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);
            request.UserAgent = "Omurcek";
            request.Timeout = 4000;
            WebResponse response = request.GetResponse();
            Stream stream = response.GetResponseStream();
            StreamReader reader = new StreamReader(stream);
            return reader.ReadToEnd();
        }   

        catch (Exception ex )
        {
            LogYaz("Receive DATA Error : " + URL   + ex.ToString());
            return "";
        }

    }