Dialog Events

Updated on Oct 1, 2026

This article explains the events available in the Telerik Dialog for Blazor:

• VisibleChanged

The event is an EventCallback. It can be synchronous and return void, or asynchronous and return async Task. Do not use async void.

VisibleChanged

You can use the VisibleChanged event to get notifications when the user tries to close the Dialog. You can effectively cancel the event by not propagating the new visibility state to the variable the Visible property is bound to. This is the way to cancel the event and keep the dialog open.

React to the user closing the Dialog.

Example

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Prevent the user from closing the Dialog based on a condition.

Example

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See Also

• Focus TextBox on Dialog Open