When session is invalid, how to redirect user to the login page

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I have a asp.net app. When session is invalid, how to redirect user to the
login page? I don't want to add the code to redirect user to the login page
into every page.

Thanks,
-Billy

[bruce barker]

this is what the global.asax is for. PostAcquireRequ estState would be a
good event.

-- bruce (sqlwork.com)

Billy Zhang wrote:

I have a asp.net app. When session is invalid, how to redirect user to the
login page? I don't want to add the code to redirect user to the login page
into every page.

Thanks,
-Billy

[Steven Cheng]

Hi Billy,

Are you using custom forms authentication which is based on some
information stored in session? Anyway, if you do need a central place
where you can check session state and redirect request, you can consider
the approach Bruce introduced(use some global events ).

And instead of using global.asax, you can also write a custom httpmodule to
hook any of the global events in ASP.NET. Here are two kb articles
introduce this:

#INFO: ASP.NET HTTP Modules and HTTP Handlers Overview
http://support.microsoft.com/kb/307985

#How To Create an ASP.NET HTTP Module Using Visual C# .NET
http://support.microsoft.com/kb/307996

Hope this helps.

Sincerely,

Steven Cheng

Microsoft MSDN Online Support Lead
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--------------------

>From: =?Utf-8?B?QmlsbHkgWmh hbmc=?= <ht****@noemail .noemail>
Subject: When session is invalid, how to redirect user to the login page
Date: Mon, 10 Nov 2008 19:04:00 -0800

>I have a asp.net app. When session is invalid, how to redirect user to

the

>login page? I don't want to add the code to redirect user to the login

page

>into every page.

Thanks,
-Billy

[jacerhea]

You may also consider using a base page. Basically, create a class
that inherits from System.Web.UI.P age and have all of your aspx pages
inherit from that class. You can than put your session check code in
there.

http://aspnet.4guysfromrolla.com/articles/041305-1.aspx