c# 尝试抓取阿里巴巴的页面报错：无法连接远程服务器，真奇怪啊，求高人指点
抓取url：http://detail.china.alibaba.com/buyer/offerdetail/106312402.html
浏览器访问无问题


代码如下
public string getPage(String url, Encoding coding, out int err)
        {
            System.Net.WebResponse result = null;
            string errorMsg = "";
            string resultstring = "";
            try
            {
                //WebRequest req = WebRequest.Create(url);
                Uri ri = new Uri(url);

                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(ri);
                req.CookieContainer = new CookieContainer();

                
                result = req.GetResponse();

                Stream ReceiveStream = result.GetResponseStream();

                //read the stream into a string
                StreamReader sr = new StreamReader(ReceiveStream, coding);
                resultstring = sr.ReadToEnd();
                err = 0;

            }
            catch (WebException exp)
            {
                err = 1;
                errorMsg = url + "获取页面失败,错误原因:" + exp.Message.ToString();
               

            }
            finally
            {
                if (result != null)
                {
                    result.Close();
                }
    &nbs