Programatically Login http://waec2013.com/waecexam/ in asp.net - asp.net

Question

Guys I try to login to http://waec2013.com/waecexam/ website by using
HttpWebRequest
CookieContainer
There is another technique I can use webbrowser but as this is web application so I cannot use webbrowser.
But no luck is this possible that I can login to that website and get the specific data?
I do reverse engineering and do some coding but not achieve my result.
Any Suggestions
string formUrl = "http://waec2013.com/waecexam/";
string formParams = string.Format("adminName={0}&adminPass={1}&act={2}",
"passwaec", "cee660","login");
string cookieHeader;
WebRequest req = WebRequest.Create(formUrl);
req.ContentType = "application/x-www-form-urlencoded";
req.Method = "POST";
byte[] bytes = Encoding.ASCII.GetBytes(formParams);
req.ContentLength = bytes.Length;
using (Stream os = req.GetRequestStream())
{
os.Write(bytes, 0, bytes.Length);
}
WebResponse resp = req.GetResponse();
cookieHeader = resp.Headers["Set-cookie"];
string pageSource;
string getUrl = "http://waec2013.com/waecexam/Leads.php";
WebRequest getRequest = WebRequest.Create(getUrl);
getRequest.Headers.Add("Cookie", cookieHeader);
WebResponse getResponse = getRequest.GetResponse();
using (StreamReader sr = new StreamReader(getResponse.GetResponseStream()))
{
pageSource = sr.ReadToEnd();
}

Answer 1

Finally I have resolve my own question and post for you guys if you need it.
public class CookiesAwareWebClient : WebClient
{
public CookieContainer CookieContainer { get; private set; }
public CookiesAwareWebClient()
{
CookieContainer = new CookieContainer();
}
protected override WebRequest GetWebRequest(Uri address)
{
var request = base.GetWebRequest(address);
((HttpWebRequest)request).CookieContainer = CookieContainer;
return request;
}
}
using (var client = new CookiesAwareWebClient())
{
var values = new NameValueCollection
{
{ "adminName", "passwaec" },
{ "adminPass", "cee660" },
{ "x", "0" },
{ "y", "0" },
{ "act", "login" },
};
// We authenticate first
client.UploadValues("http://waec2013.com/waecexam/index.php", values);
// Now we can download
client.DownloadFile("http://waec2013.com/waecexam/leadExp.php?act=export",
#"c:\abc.txt");
}

Answer 2

Add this at the start of your method:
var cookies = new CookieContainer();
After each line where you create a webrequest assing the cookies to the instantiated request:
WebRequest req = WebRequest.Create(formUrl);
req.CookieContainer = cookies;
This will store any incoming cookies and send all cookies in the container to the webserver when GETing POSTing.
You don't need to use the Set-Cookie header in that case.