ContentElement.PreviewLostKeyboardFocus ContentElement.PreviewLostKeyboardFocus ContentElement.PreviewLostKeyboardFocus ContentElement.PreviewLostKeyboardFocus Event

定義

鍵盤不再以此元素為焦點時發生。Occurs when the keyboard is no longer focused on this element.

public:
 virtual event System::Windows::Input::KeyboardFocusChangedEventHandler ^ PreviewLostKeyboardFocus;
public event System.Windows.Input.KeyboardFocusChangedEventHandler PreviewLostKeyboardFocus;
member this.PreviewLostKeyboardFocus : System.Windows.Input.KeyboardFocusChangedEventHandler 
Public Custom Event PreviewLostKeyboardFocus As KeyboardFocusChangedEventHandler 

實作

備註

由於這個事件會使用通道路由,失去焦點的項目可能的子項目,而非項目實際附加事件處理常式。Because this event uses tunneling routing, the element that lost focus might be a child element instead of the element where the event handler is actually attached. 檢查Source事件資料來判斷實際失去焦點的項目中。Check the Source in the event data to determine the actual element that lost focus.

此事件建立的別名Keyboard.PreviewLostKeyboardFocus附加事件,此類別中,以便PreviewLostKeyboardFocus屬於類別的成員清單時ContentElement繼承為基底的項目。This event creates an alias for the Keyboard.PreviewLostKeyboardFocus attached event for this class, so that PreviewLostKeyboardFocus is part of the class members list when ContentElement is inherited as a base element. 附加至事件處理常式PreviewLostKeyboardFocus事件會附加至基礎Keyboard.PreviewLostKeyboardFocus附加事件,並接收相同的事件資料執行個體。Event handlers that are attached to the PreviewLostKeyboardFocus event are attached to the underlying Keyboard.PreviewLostKeyboardFocus attached event and receive the same event data instance.

路由事件資訊Routed Event Information

識別項欄位Identifier field PreviewLostKeyboardFocusEvent
路由策略Routing strategy 通道Tunneling
Delegate - 委派Delegate KeyboardFocusChangedEventHandler

適用於

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