OnKeyDown Method

CheckBox.OnKeyDown Method (KeyEventArgs)


Responds to a CheckBoxKeyDown event.

Namespace:   System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

protected override void OnKeyDown(
	KeyEventArgs e


Type: System.Windows.Input.KeyEventArgs

The KeyEventArgs that contains the event data.

This implementation marks the KeyDown event as handled by setting the Handled property of the event data to true when the user presses the plus or the minus key.

This method sets IsChecked to true when the user presses the plus key and to false when the user presses the minus key.

Notes to Inheritors:

If you override OnKeyDown, always call the base implementation in your OnKeyDown implementation. Failure to call the base implementation prevents base classes from handling the event with a class handler, which might change the run-time behavior of the final class. You can call the base implementation either before or after your special handling, depending on your requirements.

.NET Framework
Available since 3.0
Return to top
© 2015 Microsoft