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

因為此事件使用通道路由, 所以具有焦點的元素可能是子項目, 而不是實際附加事件處理常式的專案。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. 檢查事件Source資料中的, 以判斷具有焦點的實際元素。Check the Source in the event data to determine the actual element that has focus.

這個事件PreviewGotKeyboardFocus會為這個類別建立Keyboard.PreviewGotKeyboardFocus附加事件的別名, 因此當繼承為基底專案時UIElement , 就是類別成員清單的一部分。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PreviewGotKeyboardFocus事件的事件處理常式會附加至基礎Keyboard.PreviewGotKeyboardFocus附加事件, 並接收相同的事件資料實例。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

識別碼欄位Identifier field PreviewGotKeyboardFocusEvent
路由策略Routing strategy 建立Tunneling
Delegate - 委派Delegate KeyboardFocusChangedEventHandler

適用於

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