Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

AutomationPeer.InvalidatePeer Method

Triggers recalculation of the main properties of the AutomationPeer and raises the PropertyChanged notification to the Automation Client if the properties changed.

Namespace: System.Windows.Automation.Peers
Assembly: PresentationCore (in presentationcore.dll)

public void InvalidatePeer ()
public void InvalidatePeer ()
public function InvalidatePeer ()
You cannot use methods in XAML.

Examples of main properties include, but are not limited to, LogicalChildren and BoundingRectangle.

Typically, updates and notifications happen automatically after the update of the layout in Windows Presentation Foundation (WPF). (The update occurs in response to the LayoutUpdated event.) Sometimes, however, properties change without raising the LayoutUpdated event. For example, when the whole Window moves, the LayoutUpdated event is not raised. In this example, the set of BoundingRectangle objects change because the objects are expressed in screen coordinates. Therefore, the Window must call InvalidatePeer on its peer on WindowAutomationPeer.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

Community Additions

Show:
© 2014 Microsoft