First of all, create a new ASP.NET page in your favorite IDE and add an
instance of the ScriptManager to it. Make sure you configure the
ScriptManager to enable Page Methods.
Listing 1
<asp:scriptmanager id="ScriptManager1" runat="server"
enablepagemethods="true" />Next, we will subscribe to the unload event
of the body tag of the ASP.NET page and assign a callback method to be
called when this event fires.
Listing 2
<body onunload="HandleClose()">The HandleClose function is placed within
the Head section of the page.
Listing 3
<script language="javascript" type="text/javascript">
//<![CDATA[
function HandleClose() {
alert("Killing the session on the server!!");
PageMethods.AbandonSession();
}
//]]>
</script>As you can see, the function shows an alert message box
informing the user that the session will be killed on the server side.
Then it makes a call to the AbandonSession server side method that is a
Script-enabled method. For more information about the Page Methods in
AJAX 1.0, make sure you check the AJAX documentation.
On the server side, all that you have to do is define the AbandonSession
method and add to it the WebMethod attribute.
Listing 4
[WebMethod]
public static void AbandonSession()
{
HttpContext.Current.Session.Abandon();
}The above line of code makes sure that the session is now cleared and
causes the Session_End event, which is defined inside the Global.asax to
fire.
Inside the Global.asax you can place any code you want to execute when
the session ends.
That is all what you have to do to run any server side code when the
browser is closed by the user!
Hope this snippet is helpful and that you have enjoyed it!!
Source:
http://aspalliance.com/1294_CodeSnip_Handle_Browser_Close_Event_on_the_ServerSide.3
Mahmoud Ghoz
www.Ghoz.NET
i am looking for a strategy by which i can detect a client going
offline, asynchronously.
i don't want to wait for the session to expire.
