To check if a user already login in a web application in asp.net

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Hi All,

I have an web application in asp.net in that i have checked userid and password of a user from database and redirecting to a specified page. Now if same user passes it's credential to login page then it should show that you are already login.

Please let me know how to handle it .Is there a way to accomplish it as we know that in most of websites (like gmail etc) the user can login with same credential at a time in different browser or same browser.So I want that if a user is login then if he tries again login then it should show that you are already login.

Thanking You

Mohd Wasif

Posted 17-May-11 21:56pm

Mohd Wasif

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Abhinav S · Answer 1 · 2011-05-17T22:06:00

Solution 1

If you are using Forms Authentication,

VB

System.Web.HttpContext.Current.User.Identity.IsAuthenticated

can give you this information.

Posted 17-May-11 22:06pm

Abhinav S

suren.info · Answer 2 · 2011-05-18T18:50:00

Solution 2

You can implement this in two ways.
Server side caching variable or as an application variable using hashtable or any object which just maintains the current loggin users.
Or you can set the active state of the user in database as 1 once logged and refer to that before logging again.

Posted 18-May-11 18:50pm

suren.info

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Mohd Wasif 19-May-11 5:48am

You are right but the thing is this if user forgot to logout or he closes the browser then still it will be showing that you are already login. This is my problem.