(Forum FAQ) If you post information to a Web site and get Cookiecontainer so that you can pass validation directly later

Cookies using System;
Using System.Net;
Using System.IO;
Using System.Text; [STAThread]
static void Main (string[] args)
{
//
TODO: Add code here to start the application
//
String url= "http://localhost/csdn2/1.asp";
<%
If request ("AA") = "Zhuye" then session ("OK") = "OK"
If session ("OK") = "OK" then
Response.Write ("Login")
Else
Response.Write ("No login")
End If
%>
String Indata= "Aa=zhuye";
String Outdata= "";
Cookiecontainer mycookiecontainer=new Cookiecontainer ();
Create a new Cookiecontainer to store the cookie collection
HttpWebRequest myhttpwebrequest= (HttpWebRequest) webrequest.create (URL);
Create a new HttpWebRequest
Myhttpwebrequest.contenttype= "application/x-www-form-urlencoded";
Myhttpwebrequest.contentlength=indata. Length;
Myhttpwebrequest.method= "POST";
Myhttpwebrequest.cookiecontainer=mycookiecontainer;
Set the HttpWebRequest Cookiecontainer for the Mycookiecontainer that was just built.
Stream Myrequeststream=myhttpwebrequest.getrequeststream ();
StreamWriter Mystreamwriter=new StreamWriter (myrequeststream,encoding.getencoding ("gb2312"));
Mystreamwriter.write (Indata);
Write the data to the HttpWebRequest request stream
Mystreamwriter.close ();
Myrequeststream.close ();
Close Open Object
HttpWebResponse myhttpwebresponse= (HttpWebResponse) myhttpwebrequest.getresponse ();
Create a new HttpWebResponse
Myhttpwebresponse.cookies=mycookiecontainer.getcookies (Myhttpwebrequest.requesturi);
Gets a cookiecollection of the cookie collection that contains the URL
Stream Myresponsestream=myhttpwebresponse.getresponsestream ();
StreamReader mystreamreader=new StreamReader (myresponsestream,encoding.getencoding ("gb2312"));
Outdata=mystreamreader.readtoend ();
Read the data from the HttpWebResponse response stream
Mystreamreader.close ();
Myresponsestream.close ();
Console.WriteLine (Outdata);
Display "Login"

Get a cookie, and then make a request to read directly to the content after the login
Myhttpwebrequest= (HttpWebRequest) webrequest.create (URL);
myhttpwebrequest.cookiecontainer=mycookiecontainer;//*
The Cookiecontainer already has a cookie, attaching it to the HttpWebRequest can be validated directly
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);
Show "Login" again
If the * line comment is adjusted, it shows "no login"
}