SelectionPattern.InvalidatedEvent Field
Identifies the event that is raised when a selection in a container has changed significantly and requires sending more addition and removal events than the InvalidateLimit constant permits.
Namespace: System.Windows.Automation
Assembly: UIAutomationClient (in UIAutomationClient.dll)
An invalidated event is raised when a selection in a container has changed significantly and requires sending more addition and removal events than the InvalidateLimit constant permits.
This identifier is used by UI Automation client applications. UI Automation providers should use the equivalent field in SelectionPatternIdentifiers.
In the following example, an event listener is declared for the InvalidatedEvent.
///-------------------------------------------------------------------- /// <summary> /// Subscribe to the selection events of interest. /// </summary> /// <param name="selectionContainer"> /// Automation element that supports SelectionPattern /// </param> ///-------------------------------------------------------------------- private void SetSelectionEventHandlers (AutomationElement selectionContainer) { AutomationEventHandler selectionInvalidatedHandler = new AutomationEventHandler(SelectionInvalidatedHandler); Automation.AddAutomationEventHandler( SelectionPattern.InvalidatedEvent, selectionContainer, TreeScope.Element, SelectionInvalidatedHandler); } ///-------------------------------------------------------------------- /// <summary> /// Selection invalidated event handler. /// </summary> /// <param name="src">Object that raised the event.</param> /// <param name="e">Event arguments.</param> ///-------------------------------------------------------------------- private void SelectionInvalidatedHandler(object src, AutomationEventArgs e) { // TODO: event handling }
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
