CanExecuteRoutedEventArgs.CanExecute Property
Definition
Important
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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, setPublic Property CanExecute As BooleanProperty 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.
