[存底]如何向某网址Post信息，并得到CookieContainer以便以后直接通过验证

Test
{
    [STAThread]
    static void Main(string[] args)
    {
        //

        // TODO: 在此处添加代码以启动应用程序

        //

        string url = "http://localhost/csdn2/1.asp";

        //            <%

        //            if request("aa")="zhuye" then session("ok")="ok"

        //            if session("ok")="ok" then

        //            response.write("登录")

        //            else

        //            response.write("没有登录")

        //            end if

        //            %>

        string indata = "aa=zhuye";
        string outdata = "";
        CookieContainer myCookieContainer = new CookieContainer();
        //新建一个CookieContainer来存放Cookie集合

        HttpWebRequest myHttpWebRequest = (HttpWebRequest) WebRequest.Create(url);
        //新建一个HttpWebRequest

        myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";
        myHttpWebRequest.ContentLength = indata.Length;
        myHttpWebRequest.Method = "POST";
        myHttpWebRequest.CookieContainer = myCookieContainer;
        //设置HttpWebRequest的CookieContainer为刚才建立的那个myCookieContainer

        Stream myRequestStream = myHttpWebRequest.GetRequestStream();
        StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
        myStreamWriter.Write(indata);
        //把数据写入HttpWebRequest的Request流

        myStreamWriter.Close();
        myRequestStream.Close();
        //关闭打开对象

        HttpWebResponse myHttpWebResponse = (HttpWebResponse) myHttpWebRequest.GetResponse();
        //新建一个HttpWebResponse

        myHttpWebResponse.Cookies = myCookieContainer.GetCookies(myHttpWebRequest.RequestUri);
        //获取一个包含url的Cookie集合的CookieCollection

        Stream myResponseStream = myHttpWebResponse.GetResponseStream();
        StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("gb2312"));
        outdata = myStreamReader.ReadToEnd();
        //把数据从HttpWebResponse的Response流中读出

        myStreamReader.Close();
        myResponseStream.Close();
        Console.WriteLine(outdata);
        //显示"登录"

        //拿到了Cookie，再进行请求就能直接读取到登录后的内容了

        myHttpWebRequest = (HttpWebRequest) WebRequest.Create(url);
        myHttpWebRequest.CookieContainer = myCookieContainer;//*

        //刚才那个CookieContainer已经存有了Cookie,把它附加到HttpWebRequest中则能直接通过验证

        myHttpWebResponse = (HttpWebResponse) myHttpWebRequest.GetResponse();
        myHttpWebResponse.Cookies = myCookieContainer.GetCookies(myHttpWebRequest.RequestUri);
        myResponseStream = myHttpWebResponse.GetResponseStream();
        myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("gb2312"));
        outdata = myStreamReader.ReadToEnd();
        myStreamReader.Close();
        myResponseStream.Close();
        Console.WriteLine(outdata);
        //再次显示"登录"

        //如果把*行注释调，就显示"没有登录"

    }
}

注释写得很明确了，不多罗嗦了。补充：如果是以get方式登录的话，直接修改url就可以了，indate可以不写任何东西。（不要去修改 myHttpWebRequest.Method为GET），比如把asp文件修改为 if request.querystring("aa")="zhuye" then session("ok")="ok"，只要修改url为 string url="http://localhost/csdn2/1.asp?aa=zhuye";即可。