KeyEventArgs.IsUp Property

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

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

public bool IsUp { get; }

Property Value

Type: System.Boolean
true if the key is up; otherwise, false. There is no default value.

The Keyboard class also provides information about the state of the keys on the keyboard. For instance, the IsKeyUp method returns whether a specified is up.

The following example checks whether the key associated with an instance of KeyEventArgs is up by obtaining the state of the IsUp property.


// e is an instance of KeyEventArgs.
// btnIsUp is a Button.
if (e.IsUp)
{
    btnIsUp.Background = Brushes.Red;
}


.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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