UIElement.PreviewGotKeyboardFocus UIElement.PreviewGotKeyboardFocus UIElement.PreviewGotKeyboardFocus UIElement.PreviewGotKeyboardFocus Event

定義

鍵盤以此元素為焦點時發生。Occurs when the keyboard is focused on this element.

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

實作

備註

這個事件會使用通道路由,因為具有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 has 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擁有焦點的項目中。Check the Source in the event data to determine the actual element that has focus.

此事件建立的別名Keyboard.PreviewGotKeyboardFocus附加事件,此類別中,以便PreviewGotKeyboardFocus屬於類別的成員清單時UIElement繼承為基底的項目。This event creates an alias for the Keyboard.PreviewGotKeyboardFocus attached event for this class, so that PreviewGotKeyboardFocus is part of the class members list when UIElement is inherited as a base element. 附加至事件處理常式PreviewGotKeyboardFocus事件會附加至基礎Keyboard.PreviewGotKeyboardFocus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 PreviewGotKeyboardFocus event are attached to the underlying Keyboard.PreviewGotKeyboardFocus 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 PreviewGotKeyboardFocusEvent
路由策略Routing strategy 通道Tunneling
Delegate - 委派Delegate KeyboardFocusChangedEventHandler

適用於

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