FrameworkElement.MoveFocus(TraversalRequest) 方法

定義

命名空間:

System.Windows

組件:

PresentationFramework.dll

以所提供的周遊方向，將鍵盤焦點從這個項目移到其他項目。

public:
 override bool MoveFocus(System::Windows::Input::TraversalRequest ^ request);

public override sealed bool MoveFocus (System.Windows.Input.TraversalRequest request);

override this.MoveFocus : System.Windows.Input.TraversalRequest -> bool

Public Overrides NotOverridable Function MoveFocus (request As TraversalRequest) As Boolean

參數

request

TraversalRequest

要移動焦點的方向，以列舉型別 (Enumeration) 的值表示。

傳回

Boolean

若成功移動焦點則傳回 true，若所指定之方向的目標項目不存在，或無法成為鍵盤導向，則傳回 false。

範例

下列範例會實作處理數個可能按鈕輸入的處理常式。 每個按鈕都代表可能的 FocusNavigationDirection 。 處理常式會指定適當的 FocusNavigationDirection 做為所提供之類型參數的初始化 TraversalRequest ，以追蹤具有目前鍵盤焦點的專案，並在該元素上呼叫 MoveFocus 。

// Creating a FocusNavigationDirection object and setting it to a
// local field that contains the direction selected.
FocusNavigationDirection focusDirection = _focusMoveValue;

// MoveFocus takes a TraveralReqest as its argument.
TraversalRequest request = new TraversalRequest(focusDirection);

// Gets the element with keyboard focus.
UIElement elementWithFocus = Keyboard.FocusedElement as UIElement;

// Change keyboard focus.
if (elementWithFocus != null)
{
    elementWithFocus.MoveFocus(request);
}

' Creating a FocusNavigationDirection object and setting it to a
' local field that contains the direction selected.
Dim focusDirection As FocusNavigationDirection = _focusMoveValue

' MoveFocus takes a TraveralReqest as its argument.
Dim request As New TraversalRequest(focusDirection)

' Gets the element with keyboard focus.
Dim elementWithFocus As UIElement = TryCast(Keyboard.FocusedElement, UIElement)

' Change keyboard focus.
If elementWithFocus IsNot Nothing Then
    elementWithFocus.MoveFocus(request)
End If

備註

這個實作會 UIElement.MoveFocus 覆寫 並密封 方法。

另請參閱

• MoveFocus(TraversalRequest)
• Focus()