Hi,
I am working on asp.net C# and SQL server.
I am trying to creat login class. My problem is how to
prevent one user login multiple times simultaniously.
I wish that only one use should be connected at a time.
only few previlaged people should be able to login multiple
times simultaniously like admin people.
I am going to use SQL server to store session state. Also
I have to deploy this website in Web garden/ web farm senario.

Please let me know urgently any solution.
Regards,
Amit Joshi
Pune, Maharashtra, India.

Hi Amit,

For this purpose, use Application_AuthenticateRequest in global.asax.
when ever a user logged in & authenticate then store his/her user id (pls note not Session id bcoz it will different for every session, Session.SessionID).
So store user's unique userid in session variable & store it in a saperate database table. & Session_End subroutine remove the user's userid frm database table & also from Session variable.& whenever any user logged in check that this user id is present in the table or not.

So, what happens, u have the all current users that logged in in ur site. Now u can write any code to block the newer user or any other.

Regards,
Anuj Rathi

I will try this solution. But if I use SQL server 2 store session state then Session_End does not get fired. So what to do in such cases?
Regards,
Amit Joshi
Pune, Maharashtra, India.

hey why can't U a master table containing flags that gives the authentication level of each user .
if U have this status then in Ur code U can check for that and then start\restrict multiple sesssions right?

ok Antony,I will try this trick.and convey results.