Net C# Book


            A typical website that implements forms authentication will contain HTML like this:

Here's how to log into such a site:
 
using System;
using System.Net;
using System.Threading;
using System.IO;
using System.Text;
class ThreadTest
{
 static void Main()
 {
 string loginUri = "http://www.somesite.com/login";
 string username = "username";
 string password = "password";
 string reqString = "username=" + username + "&password=" + password;
 byte[] requestData = Encoding.UTF8.GetBytes(reqString);
 CookieContainer cc = new CookieContainer();
 var request = (HttpWebRequest)WebRequest.Create(loginUri);
 request.Proxy = null; request.CookieContainer = cc; 
 request.Method = "POST";
 request.ContentType = "application/x-www-form-urlencoded";
 request.ContentLength = requestData.Length;
 using (Stream s = request.GetRequestStream())
 s.Write(requestData, 0, requestData.Length);
 using (var response = (HttpWebResponse)request.GetResponse())
 foreach (Cookie c in response.Cookies) 
 Console.WriteLine(c.Name + " = " + c.Value);
 }
}