LostFocusEventManager Class

Provides a WeakEventManager implementation so that you can use the "weak event listener" pattern to attach listeners for the UIElement.LostFocus or ContentElement.LostFocus events.

Namespace: System.Windows
Assembly: PresentationFramework (in presentationframework.dll)
XML Namespace:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

public class LostFocusEventManager : WeakEventManager
public class LostFocusEventManager extends WeakEventManager
public class LostFocusEventManager extends WeakEventManager
You cannot use this managed class in XAML.

In order to be listeners in this pattern, your listener objects must implement IWeakEventListener. You do not need to implement IWeakEventListener on the class that is the source of the events.

WPF data binding uses this WeakEventManager so that internal classes that update bindings can attach listeners for a UIElement.LostFocus or ContentElement.LostFocus event on an object that is the target of a binding. This supports notification for the LostFocus mode of data binding, without creating strong references to data binding targets.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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