怎样通过cookie打开网页？

Question

根据已知用户名和密码用HttpWebRequest获得的CookieContainer后，怎么能做出效果相当于在网站上真正登陆一样，以便打开或跳转到需要登陆的网页进行浏览！

Answer 1

   下面是我取CookieContainer的方法...CookieContainer取出来了，也可以用HttpWebResponse取得登录后想要的数据，但是不能直接跳转进入网站.
 private  string PostWebRequest()        
        {
                       CookieContainer cc = new CookieContainer();
                        string postData = "logintype=uid&u=xxxx&psw=xxxx&product=mail&%B5%C7%C2%BC=%B5%C7+%C2%BC";
                   byte[] byteArray = Encoding.UTF8.GetBytes(postData); // 转化            HttpWebRequest webRequest2 = (HttpWebRequest)WebRequest.Create("http://mail.sina.com.cn/cgi-bin/login.php");
            webRequest2.CookieContainer = cc;
            webRequest2.AllowAutoRedirect = true;
            webRequest2.Method = "POST";
            webRequest2.ContentType = "application/x-www-form-urlencoded";
            webRequest2.ContentLength = byteArray.Length;
            Stream newStream = webRequest2.GetRequestStream();
            // Send the data.
            newStream.Write(byteArray, 0, byteArray.Length);    //写入参数
              newStream.Close();           HttpWebResponse response2 = (HttpWebResponse)webRequest2.GetResponse();
           response2.Cookies = cc.GetCookies(webRequest2.RequestUri);
           string a = "";
           foreach (Cookie i in webRequest2.CookieContainer.GetCookies(new Uri("http://mail.sina.com.cn/cgi-bin/login.php")))
           {
               a += i.ToString() + ";";
           } 
            cc.Add(response2.Cookies);   
           StreamReader sr2 = new StreamReader(response2.GetResponseStream(), Encoding.GetEncoding("UTF-8"));           
            string str =  sr2.ReadToEnd();
           
            return str;        
         }