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AutoCompleteBox.OnKeyDown Method

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

Provides handling for the KeyDown event.

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

Syntax

'Declaration
Protected Overrides Sub OnKeyDown ( _
    e As KeyEventArgs _
)
protected override void OnKeyDown(
    KeyEventArgs e
)

Parameters

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 sets the KeyEventArgs.Handled property of the event data to true in the following situations:

Notes to Inheritors

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

Version Information

Silverlight

Supported in: 5, 4, 3

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.