Window Actions

Updated on Oct 1, 2026

The Window offers action buttons in its titlebar:

• Built-in actions
  • Maximize
  • Minimize
  • Close
• Custom action buttons

To define action buttons, populate the WindowActions tag of the Window with WindowAction instances.

Action Parameters

Action buttons expose the following properties:

Parameter	Type and Default Value	Description
Name	string	The name of the action. Can be one of the built-in actions (see above), or a custom action name.
Hidden	bool	Sets if the action button is rendered. Do not use for the Minimize and Maximize actions, because the Window manages their visibility internally, based on the component state.
OnClick	EventCallback<MouseEventArgs>	An event handler to respond to custom action clicks.
Icon	string	The CSS class of the icon to be rendered. Use with the Telerik font icons, or set your own font icon class.
Title	string	The title HTML attribute of the action button.

Built-in Actions

The built-in actions of a Window

Example

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Setting custom icons for the built-in actions is not supported. If you need to specify a custom icon for a built-in action, use a custom action instead.

Custom Actions

You can create a custom action icon and you must provide its OnClick handler.

Handling a custom action

Example

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See Also

• (Demo) Window Actions
• (KB) Keep Content in the DOM When the Window Is Closed