Display the list of registered users online, standby,offline

Question

Hi everybody,

 

I am trying to make a web application in asp.net mvc 4. In this web application, i maked an authentication system (registration and login, password reset).

In a table I also displayed a list of all users registered in the database of the web application.

 

What i want: Please i want to know how to display the list of registered users "online", "in standby" and "offline".

 

Thank you very much.