FrameworkElement.MoveFocus(TraversalRequest) FrameworkElement.MoveFocus(TraversalRequest) FrameworkElement.MoveFocus(TraversalRequest) FrameworkElement.MoveFocus(TraversalRequest) Method

定义

以提供的遍历方向将键盘焦点从此元素移到其他元素上。Moves the keyboard focus away from this element and to another element in a provided traversal direction.

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

参数

request
TraversalRequest TraversalRequest TraversalRequest TraversalRequest

焦点要移动的方向,作为一个枚举值。The direction that focus is to be moved, as a value of the enumeration.

返回

如果焦点移动成功,则返回 true;如果指定方向上不存在目标元素,或者未能将键盘焦点移到目标元素上,则返回 falseReturns true if focus is moved successfully; false if the target element in direction as specified does not exist or could not be keyboard focused.

示例

下面的示例实现处理几个可能的按钮输入的处理程序。The following example implements a handler that handles several possible button inputs. 每个按钮都表示FocusNavigationDirection一个可能的。Each button represents a possible FocusNavigationDirection. 处理程序通过为所提供的MoveFocus TraversalRequest类型参数指定适当FocusNavigationDirection的作为初始化, 来跟踪具有当前键盘焦点的元素, 并对该元素调用。The handler tracks the element with current keyboard focus, and calls MoveFocus on that element, by specifying the appropriate FocusNavigationDirection as initialization for the TraversalRequest type parameter provided.

// 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

注解

此实现将UIElement.MoveFocus重写并密封方法。This implementation overrides UIElement.MoveFocus and seals the method.

适用于

另请参阅