CanExecuteRoutedEventArgs.CanExecute CanExecuteRoutedEventArgs.CanExecute CanExecuteRoutedEventArgs.CanExecute CanExecuteRoutedEventArgs.CanExecute Property

Definition

Gets or sets a value that indicates whether the RoutedCommand associated with this event can be executed on the command target.

public:
 property bool CanExecute { bool get(); void set(bool value); };
public bool CanExecute { get; set; }
member this.CanExecute : bool with get, set
Public Property CanExecute As Boolean

Property Value

true if the event can be executed on the command target; otherwise, false. The default value is false.

Examples

The follow example creates a CanExecuteRoutedEventHandler that only returns true if the command target is a control. First the Source event data is cast to a Control. If it is a Control, CanExecute is set to true; otherwise, it is set to false.

// CanExecuteRoutedEventHandler that only returns true if
// the source is a control.
private void CanExecuteCustomCommand(object sender, 
    CanExecuteRoutedEventArgs e)
{
    Control target = e.Source as Control;
    
    if(target != null)
    {
        e.CanExecute = true;
    }
    else
    {
        e.CanExecute = false;
    }
}
' CanExecuteRoutedEventHandler that only returns true if
' the source is a control.
Private Sub CanExecuteCustomCommand(ByVal sender As Object, ByVal e As CanExecuteRoutedEventArgs)
	Dim target As Control = TryCast(e.Source, Control)

	If target IsNot Nothing Then
		e.CanExecute = True
	Else
		e.CanExecute = False
	End If
End Sub

Remarks

Many command sources, such as MenuItem and Button, are disabled when CanExecute is false and enabled when the CanExecute is true.

Applies to

See also