TraversalRequest 類別

定義

public ref class TraversalRequest

[System.Serializable]
public class TraversalRequest

public class TraversalRequest

[<System.Serializable>]
type TraversalRequest = class

type TraversalRequest = class

Public Class TraversalRequest

繼承

Object

TraversalRequest

屬性

SerializableAttribute

範例

下列範例會 TraversalRequest 建立 實例做為呼叫的 FrameworkElement.MoveFocus 輸入。

// 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

備註

這個類別會當做 方法的 UIElement.MoveFocus 輸入參數使用。 MoveFocus方法具有 WPF 架構層級覆寫，可提供更實用的實作 (FrameworkElement.MoveFocus) ，以及 和 FrameworkContentElement上的平行實作ContentElement。 當您要求將焦點移至另一個專案時，您通常會在 上 TraversalRequest 設定屬性，以自定義焦點行為。

此類別也作為下列方法的輸入參數：

• TabInto，以及用於互操作 () TabInto 的該方法實作。

• OnNoMoreTabStops.

建構函式

屬性

方法

適用於

另請參閱

• PredictFocus(FocusNavigationDirection)