Hi,

 I've used this code to prevent simultaneous logons:

                        Dim strConCat As String = e.User.Username
                        Dim strUser As String = Convert.ToString(Cache(strConCat))

                        If strUser Is Nothing Or strUser.Equals([String].Empty) Then

                            Dim SessTimeOut As New TimeSpan(0, 0, Session.Timeout, 0, 0)

                            Cache.Insert(strConCat, strConCat, Nothing, DateTime.MaxValue, SessTimeOut, CacheItemPriority.NotRemovable, Nothing)
                         

           ' rest of the code for user login

                        Else
                            AddModuleMessage("MultipleLoginFailed", ModuleMessageType.RedError, True)
                        End If

It works fine, but cache object is not destroyed when i logout, or close browser, it's still there until SessTimeOut. Is there some configuration for cache in DNN for this to work, or I'm doing something wrong?

Thanks!

Thanks for reply...

Problem is when user close browser. I figured cache can be cleared, every few minutes, and delete unused cache items, like for the user who closed browser. Is this possible?