CookieContainer

HttpWebRequest属性提供CookieContainer类的一个实例，该实例包含与此请求关联的 cookie。

        CookieContainer c = new CookieContainer();    //声明一个CookieContainer
        HttpWebRequest requset = (HttpWebRequest)WebRequest.Create("URL1登录页");
        requset.CookieContainer = c;      //登录相关的Cookie
        HttpWebResponse respons = (HttpWebResponse)requset.GetResponse();
        
        Stream dataStream = respons.GetResponseStream();
        StreamReader reader = new StreamReader(dataStream, System.Text.Encoding.GetEncoding("gb2312"));
        string s = reader.ReadToEnd();
        dataStream.Close();
        reader.Close();

        requset = (HttpWebRequest)WebRequest.Create("URL2其他页面");
        requset.CookieContainer = c;     //呆着登录相关的Cookie去访问内部页面
        respons = (HttpWebResponse)requset.GetResponse();

        dataStream = respons.GetResponseStream();
        reader = new StreamReader(dataStream, System.Text.Encoding.GetEncoding("gb2312"));
        s = reader.ReadToEnd();
        dataStream.Close();
        reader.Close();
        Response.Write(s);