| C1.Xaml Assembly > C1.Xaml Namespace > C1DropDownButton Class : IsDropDownOpenChanged Event |
'Declaration Public Event IsDropDownOpenChanged As System.EventHandler(Of PropertyChangedEventArgs(Of Boolean))
public event System.EventHandler<PropertyChangedEventArgs<bool>> IsDropDownOpenChanged
The event handler receives an argument of type PropertyChangedEventArgs<T> containing data related to this event. The following PropertyChangedEventArgs<T> properties provide information specific to this event.
| Property | Description |
|---|---|
| NewValue | The value of the property after the change. |
| OldValue | The value of the property before the change. |