how to notify webserver when user closes the browser (in asp.net) ?

Question

I am developing a relay chat application , divided into 2 panes.

right pane - > The Chat responses of users (this uses a ASP.NET Multiline Label control placed inside the update panel , so when any user types the responses and submits it is added to this control)

left panes -> the list of users currently online(this uses ASP.NET list control which is also placed inside the update panel).

below this is the textbox for the user to enter text and a send button to post his response.

everything works fine. But when user closes the browser window instead of clicking the log out button. the list on the left pane is not getting refreshed.

It happens properly , when the user logs out.

IS there any way to knock of the users name from the list if the user closes the browser?(even before his session is expired on the server side).?

sorry i couldn expose the screen shot.

can any one suggest an idea along with a sample code snippet.?

thanks

vijay

Answer 1

You can use Javascript to detect when the browser has been closed, and then kick-off an AJAX request back to the server notifying that the user left.

Answer 2

You can do it the other way around: ping the server from the browser with an ajax call periodically. If no ping received, remove the user.

Answer 3

Session.TimeOut property. When session timed-out then application event Session_End will be fired.

EDIT:

I am agree with my friends commented belows. http://69.10.233.10/KB/aspnet/SessionEndStatePersister.aspx

SUMMARY:However, when using any kind of state management other than InProc (such as StateServer or SqlStateServer), the ASP.NET web application does not fire the Session_End event, and any code in this method will not be executed.