How to check session is expired or not--possible approach

I found the below Info at http://forums.asp.net/t/1138444.aspx

My question: "What would be the best place to initialize Session["UserId"]=User.Identity.Name; ??  "

In Session_Start(..) of Global.asax ?? Or Another Location?

The info:

Usually when its user/role based application we always store userid/username in session.

So this is a variable that an application always needs.... So you can even check the individual variable which is maitained for Session Tracking/Identification.

if (Session["UserId"] == null)
{

    Response.Redirect("Login.aspx?reason=SessionTimeout"); //Passing the reason in querystring to notify the user in Login page.
}
niceguy971Asked:
Who is Participating?
 
BuggyCoderCommented:
i think the best place would be when your authentication of login is complete.
Say you have Authenticate method in Login.aspx page handler.

once the use if authenticated, you can set the session there like this:-

private void Authenticate(string userid,string password)
{
if(DoAuthenticate(userid,password))
{
Session["UserId"]=userid;
}
}

private bool DoAuthenticate(string userid, string password)
{
//Authenticate here by matching the userid and password
}

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masterpassCommented:
Have a look here:

http://forums.asp.net/t/1283071.aspx/1

and

http://forums.asp.net/t/1667680.aspx/1

It actually does not matter where you start your session. Although the best place is Session_Start

Hope this helps!
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gery128Commented:
@niceguy971
Why you want to initialize Session["UserId"] ?
You already have that in User.Identity.Name which is available throughout the application. So you can access it anywhere you want in application without transferring to Session object as an additional variable.
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niceguy971Author Commented:
Hi gery128. My original question : "How to check if session is expired?"  Per Info at

http://forums.asp.net/t/1138444.aspx it's possible to use Session["UserId"] ..or another

Session["something"]..so i was asking "What would be the best place to initialize

Session["UserId"] or Session["something"] ?"

Did you read the info at http://forums.asp.net/t/1138444.aspx ?
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niceguy971Author Commented:
Thanks
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