Artigo
11/18/2011

Slider.OnKeyDown Method

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

Provides class handling for the UIElement.KeyDown event.

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

Syntax

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

protected override void OnKeyDown(
    KeyEventArgs e
)

Parameters

e
Type: System.Windows.Input.KeyEventArgs
A KeyEventArgs that contains the event data.

Remarks

This implementation increments or decrements the Value property by the SmallChange value according to the following table

Key Pressed	Slider direction	Result
Up or Right	Default	Increment
Up or Right	Reversed	Decrement
Down or Left	Default	Decrement
Down or Left	Reversed	Increment

The OnKeyDown method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors

When overriding OnKeyDown in a derived class, make sure to call the base class’s OnKeyDown method so that registered delegates receive the event.

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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