Article
11/18/2011

Control.OnKeyDown Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Called before the KeyDown event occurs.

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

Syntax

'Declaration
Protected Overridable Sub OnKeyDown ( _
    e As KeyEventArgs _
)

protected virtual void OnKeyDown(
    KeyEventArgs e
)

Parameters

e
Type: System.Windows.Input.KeyEventArgs
The data for the event.

Remarks

The OnKeyDown method is called before any event handler for the KeyDown event is called. This method allows derived classes to handle the KeyDown event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

This implementation does not change the handled state (the Handled property) of the KeyDown event data.

Notes to Inheritors

If you override OnKeyDown, you can prevent registered delegates from receiving events by setting Handled to true. For more information about routed events and the KeyDown property, see Events Overview for Silverlight.

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.

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