AutoCompleteBox.DropDownOpening Event
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Occurs when the value of the IsDropDownOpen property is changing from false to true.
Namespace: System.Windows.Controls
Assembly: System.Windows.Controls.Input (in System.Windows.Controls.Input.dll)
Syntax
'Declaration
Public Event DropDownOpening As RoutedPropertyChangingEventHandler(Of Boolean)
public event RoutedPropertyChangingEventHandler<bool> DropDownOpening
<sdk:AutoCompleteBox DropDownOpening="eventhandler"/>
Remarks
You can cancel this event by setting Cancel to true.
For more information about handling events, see Events Overview for Silverlight.
Version Information
Silverlight
Supported in: 5, 4, 3
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.