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.

UIElement.LostFocus Event

Occurs when this element loses logical focus.

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

public event RoutedEventHandler LostFocus
/** @event */
public void add_LostFocus (RoutedEventHandler value)

/** @event */
public void remove_LostFocus (RoutedEventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
<object LostFocus="RoutedEventHandler" .../>

Identifier field

LostFocusEvent

Routing strategy

Bubbling

Delegate

RoutedEventHandler

  • There is no corresponding tunneling event.

  • Override OnLostFocus to implement class handling for this event in derived classes.

Logical focus differs from keyboard focus if focus is deliberately forced away by using a method call but the previous keyboard focus exists in a different scope. In this scenario, keyboard focus remains where it is, and the element where a Focus method is called still gets logical focus.

A more precise interpretation of this event is that it is raised when the value of the IsFocused property of an element in the route changes from true to false.

Because this event uses bubbling routing, the element that loses focus might be a child element instead of the element where the event handler is actually attached. Check the Source in the event data to determine the actual element that gained focus.

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
Was this page helpful?
(1500 characters remaining)
Thank you for your feedback

Community Additions

Show:
© 2014 Microsoft