Detecting ASP.NET Session Timeouts

public class basePageSessionExpire : System.Web.UI.Page
{
public basePageSessionExpire()
{
}

override protected void OnInit(EventArgs e)
{
base.OnInit(e);

if (Context.Session != null)
{

if (Session.IsNewSession)
{
string szCookieHeader = Request.Headers[“Cookie”];
if ((null != szCookieHeader) && (szCookieHeader.IndexOf(“ASP.NET_SessionId”) >= 0))
{
Response.Redirect(“sessionTimeout.htm”);
}
}
}
}
}

How to create session variable which allows you to access your session properties in a type-safe way from any class

public class SessionHandler
{
private static string _userid;
private static string _menuid;

private SessionHandler() { }

public static SessionHandler Current
{
get
{
SessionHandler session =
(SessionHandler)HttpContext.Current.Session[“__MySession__”];
if (session == null)
{
session = new SessionHandler();
HttpContext.Current.Session[“__MySession__”] = session;
}
return session;
}
}

public string userid
{
get { return _userid; }
set { _userid = value; }

}
}

access values of session variables like this

SessionHandler.Current.userid

How to fetch the value from the session variable when the page is inherits from the non-page class.

Sometime you want to perform some task on page load on every page.
instead of call a function on each page. you can make a class and inherits all the pages from that class.

lets say you have a page Menu1.aspx.cs.

public partial class Menu1 : System.Web.UI.Page
{
}
replace the above line with

public partial class Menu1 : securepage
{
}

Now, create a securepage.cs
and inherits that class from System.Web.UI.Page

public class securepage : System.Web.UI.Page
{
public securepage()
{

}

}

Now if you want to access the session variable you have to write in the constructor.
like

public securepage()
{
string k=HttpContext.Current.Session[“menuid”].ToString();

}

it will generate error, because you cannot access session before page load.

the solution of above problem is:

create a page load function for that page.

public securepage()
{
base.Load += new EventHandler(securepage_Load);

}

private void securepage_Load(object sender, EventArgs e)
{
string k=HttpContext.Current.Session[“menuid”].ToString();
}