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Events

Updated on Oct 1, 2026

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

ValueChanged

The ValueChanged event fires upon every change (for example, keystroke) in the input, and upon clicking the Set or Now buttons in the dropdown.

The event handler receives the new value as an argument and you must update the component Value programmatically for the user changes to take effect.

Handle the TimePicker ValueChanged event

Example
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OnChange

The OnChange event represents a user action that confirms the current value. It fires when the user:

  • Presses Enter while the textbox is focused.
  • Clicks Set in the time selection popup.
  • Blurs the component.

The event handler receives an object argument that you need to cast to the actual Value type. The argument can hold a value or be null, depending on the user input and the Value type.

The TimePicker is a generic component, so you must either provide a Value, or a type to the T parameter of the component.

Handle DateTimePicker OnChange and use two-way Value binding

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

The OnChange event is a custom event and does not interfere with bindings, so you can use it together with models and forms.

OnOpen

The OnOpen event fires before the TimePicker popup renders.

The event handler receives as an argument an TimePickerOpenEventArgs object that contains:

PropertyDescription
IsCancelledSet the IsCancelled property to true to cancel the opening of the popup.
Example
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OnClose

The OnClose event fires before the TimePicker popup closes.

The event handler receives as an argument an TimePickerCloseEventArgs object that contains:

PropertyDescription
IsCancelledSet the IsCancelled property to true to cancel the closing of the popup.
Example
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OnBlur

The OnBlur event fires when the component loses focus.

Handle the OnBlur event

Example
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See Also