Статья
11/17/2011

KeyEventArgs Class

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

Provides event data for the UIElement.KeyUp and UIElement.KeyDown events.

Inheritance Hierarchy

System.Object
  System.EventArgs
    System.Windows.RoutedEventArgs
      System.Windows.Input.KeyEventArgs

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

Syntax

'Declaration
Public NotInheritable Class KeyEventArgs _
    Inherits RoutedEventArgs

public sealed class KeyEventArgs : RoutedEventArgs

The KeyEventArgs type exposes the following members.

Properties

	Name	Description
	Handled	Gets or sets a value that marks the routed event as handled. A true value for Handled prevents most handlers along the event route from handling the same event again.
	Key	Gets the keyboard key associated with the event.
	OriginalSource	Gets a reference to the object that raised the event. (Inherited from RoutedEventArgs.)
	PlatformKeyCode	Gets an integer value that represents the key that is pressed or released (depending on which event is raised). This value is the nonportable key code, which is operating system–specific.

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Methods

	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

Key events can be handled by user code. They can also be potentially handled by controls through virtual method overrides, such that user code does not receive specific key events. Also, a browser-hosted Silverlight application has all key events initially processed by the browser host, which might suppress certain key codes or combinations that the browser host reserves. For more information on these key event concepts, see Keyboard Support.

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.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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