Question

I use VS2010, C# to develop ASP.NET web app, I create some sessions in my app, is there any way that I can know about sessions of all users? I think this should be possible since sessions are created by server code, I want to know session states of all users, for instance I want to know how many online users I have at each moment (by looking at session[“userid”]), is there any way around that?

thanks

Answer 1

It is not possible to access the session of all other users. You are
allowed to access you own session object not others.

But you can implement it using Application object and other methods.

Ref: Getting number of active sessions (online users counter) with ASP.NET

Handle the Application events in global.asax file:

//When application start first time set onilne user to 0
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)

Application("OnlineUsers") = 0

End Sub

Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)

Application.Lock()
Application("OnlineUsers") = CInt(Application("OnlineUsers")) + 1

Application.UnLock()

End Sub

Sub Session_End(ByVal sender As Object, ByVal e As EventArgs)

Application.Lock()
Application("OnlineUsers") = CInt(Application("OnlineUsers")) - 1

Application.UnLock()

End Sub

Other Implementation methods reference:
Getting online users
ASP.NET Membership – Show list of users online