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UIElement.LostFocus 事件

Occurs when this element loses logical focus.

命名空间: System.Windows
程序集: PresentationCore(在 presentationcore.dll 中)
XML 命名空间:  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)

在 JScript 中,可处理由类定义的事件,但无法定义自己的事件。
<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 Vista、Microsoft Windows XP SP2 和 Windows Server 2003 SP1 支持 Microsoft .NET Framework 3.0。

.NET Framework

受以下版本支持:3.0

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