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+----- Thread: RegisterCallBack (/thread-3029.html)
RegisterCallBack - Xenogall - 02-17-2023
I'm struggling to get my callback to work each time a page is loaded. It always works the first time I create the page, but the callback does not work if I make the page a second time.
In my HTML I have a script to call a function when the page loading has completed.
[font=Consolas, "Courier New", monospace] <script defer>
ajaxCall("pageLoadedEvent", "");
</script>[/font]
In my application I register the callback in the form's OnCreate
WebApplication->RegisterCallBack("pageLoadedEvent", PageLoadedEvent);
The function PageLoadedEvent is called when the page has loaded. However, if I release this form and then create it again (e.g. return to login page and then login again), the callback does not work.
I've tried using the UnregisterCallback n the form's OnDestroy
WebApplication->UnregisterCallback(PageLoadedEvent);
but it doesn't seem to make any difference.
If I have the ServerController's RestartExpiredSession = true, the PageLoadedEvent can be called for a form that no longer exists, i.e. a previous form that has now been released. This crashes my application.
If I have the ServerController's RestartExpiredSession = false, the PageLoadedEvent isn't called when I make the form for a second time.
I'm using an old version of IW (15.0.17) as I can't upgrade until I can remove all the CGDevTools from my application.
If there's not way to fix this in the version of IW I am using, I'd be happy with a way of releasing the form, such that when I recreate it, I can register the callback to the new form.
Thanks,
Richard