I need to display an alert to a user, if they have been on my site for five minutes and have not logged in.
How do I do that?
Would I add soemthing to session on Application_Start? Is there a way to just check the length of someone's session? Perhaps put something in the header/master page and if it exceeds five minutes throw up the alert?
Any help would be appreciated.
Thank you.
EDIT ---
What I ended up doing was using the asp:Timer control found with the AjaxControlToolKit.
The answer does lie in Globals.asax, but Application_Start is not it. That is used for when the ASP.NET application actually starts.
I would add DateTime.Now to the session in the Session_Start method in Globals.asax. Then, you can either check it on each page load (for instance, in a base page or Master page's onload event), or use Ajax to poll the server.
Application_Start fires when the IIS Application initially gets loaded. Session_Start would fire for each new Session that gets started.
If you store the current time in the Session in Session_Start then you can check on either a page load or with an ajax call to determine if five minutes have passed without them logging in.
If you truly want a 5 minute check, you need to register a 5 minute ajax callback from Session_Start. The tricky part is having a page loaded and ready that can receive it when it fires.
Polling the server with AJAX is probably the more common approach.