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Request a Feature Report a Bug
Unplanned
Last Updated: 18 Nov 2025 07:19 by ADMIN
Michał
Created on: 25 Nov 2021 13:40
Category: Window
Type: Feature Request
10
Cancelable OnClose event

I would like to have an event that fires when the user closes the Window and to be able to cancel the event. I would like to have an identifier if the user pressed the "Esc" key or the Close button rendered in the Browser.

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ADMIN EDIT

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At the time of writing, only using the VisibleChanged event can let you prevent the Window from closing. As a workaround, you can cancel this event and use a custom close command that will not trigger it to, effectively, disable closing with Esc: https://blazorrepl.telerik.com/mJbvlMEV17noCYuv21.

4 comments
ADMIN
Dimo
Posted on: 18 Nov 2025 07:19

Hello everyone,

I updated the REPL link in the original post to: https://blazorrepl.telerik.com/mJbvlMEV17noCYuv21

The previous one was too old and no longer compatible with the current Telerik UI for Blazor API (e.g. how icons are defined).

Regards,
Dimo
Progress Telerik

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Marc
Posted on: 17 Nov 2025 16:38

We want to know how the window is closed because all our apps are 100% useable with keyboard.
Using a mouse is optional.

Escape is the general: Close this window without saving

But when a TelerikWindow is closed, I need to consume the Escape key so the parent-window does not receive the 'Escape' too and closes too. 

So that is why I need to know if Escape is used to close the window or the X or the ClickInOverlay. So I can consume the Escape when the parentpage wants to close too. Just a simple "CloseOnEscape" like "CloseOnOverlayClick" would be sufficient so you can setup your own Escape handler for the TelerikWindow.

I have managed to do so using all kind of quirks but a "CloseOnEscape" would be very usefull I guess.

Next to this, the repl does not work:
 https://blazorrepl.telerik.com/GcaqOxkT13mCiQ4q33.

 

ADMIN
Nadezhda Tacheva
Posted on: 03 Jun 2022 05:26

Hi Daniel,

Thank you for sharing your solution with the community!

Meanwhile, in the admin edit of the opening post I added another option that you and other interested parties may try.

Regards,
Nadezhda Tacheva
Progress Telerik

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Daniel
Posted on: 30 May 2022 22:31
A current workaround, you can have an empty component implement IDisposable within the Window and when the Dispose function is called, trigger a callback passed in as a parameter to the component.
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