KeyEventArgs Class

Definition

Provides data for the KeyUp and KeyDown routed events, as well as related attached and Preview events.

public ref class KeyEventArgs : System::Windows::Input::KeyboardEventArgs
public class KeyEventArgs : System.Windows.Input.KeyboardEventArgs
type KeyEventArgs = class
    inherit KeyboardEventArgs
Public Class KeyEventArgs
Inherits KeyboardEventArgs
Inheritance

Remarks

This event data class is used with the following attached events:

This event data class is also used with the following routed events on base elements. These routed events forward the previously listed attached events to make them more accessible to the general element model in WPF.

The attached events and the base element routed events share their event data, and the bubbling and tunneling versions of the routed events also share event data. This can affect the handled characteristics of the event as it travels the event route. For details, see Input Overview.

A key can be in both the up and toggled states or the down and toggled states. For this reason, determining whether a key is up or down is not as simple as checking the KeyStates value as a numeric value. Instead, you should check the value by treating it as a flag enumeration. Use an AND comparison of the first bit. Alternatively, use the helper properties IsUp, IsDown, and IsToggled to determine whether a given key is up, down, or toggled.

Constructors

KeyEventArgs(KeyboardDevice, PresentationSource, Int32, Key)

Initializes a new instance of the KeyEventArgs class.

Properties

DeadCharProcessedKey

Gets the key that is part of dead key composition to create a single combined character.

Device

Gets the input device that initiated this event.

(Inherited from InputEventArgs)
Handled

Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route.

(Inherited from RoutedEventArgs)
ImeProcessedKey

Gets the keyboard key referenced by the event, if the key will be processed by an Input Method Editor (IME).

InputSource

Gets the input source that provided this input.

IsDown

Gets a value that indicates whether the key referenced by the event is in the down state.

IsRepeat

Gets a value that indicates whether the keyboard key referenced by the event is a repeated key.

IsToggled

Gets a value that indicates whether the key referenced by the event is in the toggled state.

IsUp

Gets a value that indicates whether the key referenced by the event is in the up state.

Key

Gets the keyboard key associated with the event.

KeyboardDevice

Gets the keyboard device associated with the input event.

(Inherited from KeyboardEventArgs)
KeyStates

Gets the state of the keyboard key associated with this event.

OriginalSource

Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class.

(Inherited from RoutedEventArgs)
RoutedEvent

Gets or sets the RoutedEvent associated with this RoutedEventArgs instance.

(Inherited from RoutedEventArgs)
Source

Gets or sets a reference to the object that raised the event.

(Inherited from RoutedEventArgs)
SystemKey

Gets the keyboard key referenced by the event, if the key will be processed by the system.

Timestamp

Gets the time when this event occurred.

(Inherited from InputEventArgs)

Methods

Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType()

Gets the Type of the current instance.

(Inherited from Object)
InvokeEventHandler(Delegate, Object)

Invokes event handlers in a type-specific way, which can increase event system efficiency.

MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
OnSetSource(Object)

When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes.

(Inherited from RoutedEventArgs)
ToString()

Returns a string that represents the current object.

(Inherited from Object)

Applies to

See also