Trigger a backend function upon the browser's closing event

How can I update a record in the database with information about the logged user when they close the browser? It's crucial that this record gets updated whenever the user logs out or closes the browser. While I can handle the update on the server-side event when the user clicks 'Logout,' what should be done if the user simply exits the browser?

One suggestion is to use the window.onbeforeunload event and make an asynchronous call to a Web Service (WS) or WebMethod. However, I am not convinced because using onbeforeunload displays a confirmation prompt. Is there a way to avoid this message and directly invoke the method?

I am exploring if there is a 'server-side' solution without relying on AJAX or JavaScript. Could there be a method to trigger an event upon session abandonment or clearance, or any other approach to solve this issue while only working on the code-behind?

c#javascriptasp.net.netevents

Answer №1

It is impossible for a server-side solution to have insight into activities occurring within the client browser.

Answer №2

It appears that achieving your goal solely on the server side is not possible. The client side seems to be the preferred method as the server lacks the capability to detect when a browser window has been closed, due to restrictions in the HTTP protocol.

Answer №3

A solution to triggering an event upon session end is by placing it in the Global.AsaX file. If you require data from the client to update a database, you will need a method of transferring the data. However, if this is not necessary, the Session_End function can be utilized.

It's important to note that session end differs slightly from the browser closing, so the appropriateness of using this event depends on your specific requirements.

Learn more about handling session end in global.asax here.

Answer №4

Is there a way to achieve a 'server-side' solution without relying on ajax or javascript?

I have doubts that it is possible under those constraints.

One potential approach could be:

  1. Include a hidden IFRAME in the webpage
  2. Add a Refresh header to this IFRAME (or utilize a META element) to communicate with the server at regular intervals
  3. If no communication is received from the client after a certain period, assume the browser has been closed.

However, I anticipate that this workaround may encounter scalability issues.

Answer №5

What do you think about using signalr to track when a user has an active record?

class MessageNotifier : SignalRHub
{
     public override Task OnUserDisconnected()
     {
         DataTracker.NotifyDisconnect(Context.ConnectionId);
         return base.OnUserDisconnected();
     }
}

Answer №6

Recently, I completely altered my strategy for tackling the issue at hand. I devised a scheduled task using the Quartz.NET framework to address any outstanding tasks every night.

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