Not allow single login

Question

Is there any way to restrict multiple logins with same userid in asp.net. Remember we have to keep in mind browser close and system crash case also. Any help will be apperciated.

Jenith Thakkar · Answer

Try this 1)when any user login that time you need to generate any kind of token for that user 2)Store that Token into user table when user login 3)Remove that token from that table when user logout 4)You need to check if there's already token available and someone try to login then you can give some message like already login from one system

Sai Kumar Koona · Answer

Hi Rajendra, If your requirement is to make sure to have only one login for a user at any given time. Make sure to have one column called "IsLoggedIn" in your user table. Make it true for the first time login and make it false when log's out. In case of any other cases where a user is not logged out manually. We have 2 options Option -1: You need to implement a pooling logic such that make sure to call a server with userid for every X min. At the server end, if after X min you didn't receive any call, you can log out automatically. Option-2: Implement SignalR, as here server will be notified if there is a problem at the client end as it connection oriented it keeps monitoring its clients.

rajendra singh · Answer

Hi Mr. Sai, could you share code of signalir for restirct multiple login.

Not allow single login

Answers (3)