how to run server code when window closing

[Guest]

hi. i want to store the current state before window close, how to write code
when window closing ( before window close) ?

Thanks

 

[Scott M.]

You would need to trigger a page call from client side code, since the
window closing doesn't raise any server events.

Something like: onClose="form.submit()"

Where the form has hidden form fields with the state you want to store.