TraversalRequest(FocusNavigationDirection) 构造函数

定义

命名空间:

System.Windows.Input

程序集:

WindowsBase.dll

初始化 TraversalRequest 类的新实例。

public:
 TraversalRequest(System::Windows::Input::FocusNavigationDirection focusNavigationDirection);

public TraversalRequest (System.Windows.Input.FocusNavigationDirection focusNavigationDirection);

new System.Windows.Input.TraversalRequest : System.Windows.Input.FocusNavigationDirection -> System.Windows.Input.TraversalRequest

Public Sub New (focusNavigationDirection As FocusNavigationDirection)

参数

focusNavigationDirection

FocusNavigationDirection

预期的焦点遍历方向，作为一个枚举值。

示例

以下示例创建一个 TraversalRequest 实例作为调用的 FrameworkElement.MoveFocus 输入。

// 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

另请参阅

• MoveFocus(TraversalRequest)
• FocusNavigationDirection