ButtonBase.OnKeyUp Method
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Provides class handling for the KeyUp routed event that occurs when the user releases a key while this control has focus.
Namespace: System.Windows.Controls.Primitives
Assembly: System.Windows (in System.Windows.dll)
Syntax
'Declaration
Protected Overrides Sub OnKeyUp ( _
e As KeyEventArgs _
)
protected override void OnKeyUp(
KeyEventArgs e
)
Parameters
- e
Type: System.Windows.Input.KeyEventArgs
The event data.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | e is nulla null reference (Nothing in Visual Basic). |
Remarks
This method marks the KeyUp event as handled by setting the KeyEventArgs.Handled property of the event data to true when the ClickMode is not set to Hover and the user releases the SPACEBAR.
Notes to Inheritors
If you override OnKeyUp, always call the base implementation in your OnKeyUp 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.
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.