How to save Logon Credentials when browsing through different pages of the same site

Question

I am logging in to a web site with the username and password,
It takes me to a web page where I post data to that web page and read the html text.

This works fine for the first time.
When I go to the webpage second time and try to post the data , It takes me to the login page again.

How can I retain the login to the website.

Basically I am losing the login information for the web site, it allows me to read the data after I am logged in for the first time, if I am clicking for some information on that page, it is directing me to the login page, how to avoid this? I have to retain the login information.

public System.IO.MemoryStream GetHttpStream()

{


int iRetryCount = 0;


HttpWebRequest request1 = (HttpWebRequest)WebRequest.Create(Url);


request1.CookieContainer = new CookieContainer();


HttpWebResponse response1 = (HttpWebResponse) request1.GetResponse();

string session = response1.Headers["Set-Cookie"];



response1.Close();

response1.Cookies = request1.CookieContainer.GetCookies(request1.RequestUri);



// System.Net.CookieCollection cookieCollection = new CookieCollection();


while (iRetryCount < this.retryCount | iRetryCount == 0)

{

try

{

request1 = (System.Net.HttpWebRequest) System.Net.WebRequest.Create(url);


request1.CookieContainer = this.CookieContainer;



System.Type methType = this.HttpMethod.GetType();

request1.Method = nav_utils.clsHTTPS.HttpMethodValues.GetName(methType, this.HttpMethod);



if(this.ProxyAddress!="" && this.ProxyAddress!=null)

{

System.Net.WebProxy myProxy = new System.Net.WebProxy(this.ProxyAddress, this.ProxyPort);

myProxy.BypassProxyOnLocal = true;

request1.Proxy = myProxy;

}

else

{

request1.Proxy = WebProxy.GetDefaultProxy();

}

if(this.Referer!="" && this.Referer!=null) request1.Referer = this.Referer;

certColl=request1.ClientCertificates;

request1.AllowAutoRedirect = this.allowAutoRedirect;

request1.ContentType=this.contentType;

request1.KeepAlive=this.keepAlive;

request1.Timeout = this.timeout;

request1.UserAgent = this.userAgent;





if(this.HttpMethod==HttpMethodValues.POST)

{

if(this.Headers.Count > 0) request1.Headers = this.Headers;;

System.IO.Stream sendStream;

byte [] bytes = null;

bytes = System.Text.Encoding.ASCII.GetBytes(this.PostParameters);

request1.ContentLength = bytes.Length;

sendStream = request1.GetRequestStream();

sendStream.Write(bytes,0,bytes.Length);

sendStream.Close();

}

if(this.Username!="" && this.Username!=null)

{

request1.Credentials = new System.Net.NetworkCredential(this.Username,this.Password);

}


response1 = (HttpWebResponse) request1.GetResponse();


System.IO.Stream stream = (System.IO.Stream)response1.GetResponseStream();


System.IO.MemoryStream ms = new System.IO.MemoryStream(ConvertStreamToByteBuffer(stream));

return ms;

}

catch (System.Net.WebException webE)

{

debugPrint(webE.Message);

debugPrint("Retry " + iRetryCount.ToString());

iRetryCount++;

for (int i = 0; i < this.retrySeconds; i++)

System.Threading.Thread.Sleep(1000);

}

finally

{

}

}

}