Keyboard.IsKeyUp(Key) Method

Reference

Definition

Namespace:: System.Windows.Input

Assembly:: PresentationCore.dll

Important

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Determines whether the specified key is released.

public:
 static bool IsKeyUp(System::Windows::Input::Key key);

public static bool IsKeyUp(System.Windows.Input.Key key);

static member IsKeyUp : System.Windows.Input.Key -> bool

Public Shared Function IsKeyUp (key As Key) As Boolean

Parameters

key: Key

The key to check.

Returns

Boolean

true if key is in the up state; otherwise, false.

Examples

The following example shows how to use the IsKeyUp method to determine the state of a specific key. The Return key is passed to the IsKeyUp method. If the method returns true, then the background of a Button is changed.

// Uses the Keyboard.IsKeyUp to determine if a key is up.
if (Keyboard.IsKeyUp(Key.Return))
{
    btnIsUp.Background = Brushes.Red;
}
else
{
    btnIsUp.Background = Brushes.AliceBlue;
}

' Uses the Keyboard.IsKeyUp to determine if a key is up.
If Keyboard.IsKeyUp(Key.Return) Then
    btnIsUp.Background = Brushes.Red
Else
    btnIsUp.Background = Brushes.AliceBlue
End If

Remarks

The GetKeyStates method can be used to determine the set of states of a specific key.

Applies to

Производ	Верзије
.NET Framework	3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
Windows Desktop	3.0, 3.1, 5, 6, 7, 8, 9, 10

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