TouchDevice.Captured 屬性

定義

命名空間:

System.Windows.Input

組件:

PresentationCore.dll

取得捕捉 的 TouchDevice元素。

public:
 property System::Windows::IInputElement ^ Captured { System::Windows::IInputElement ^ get(); };

public System.Windows.IInputElement Captured { get; }

member this.Captured : System.Windows.IInputElement

Public ReadOnly Property Captured As IInputElement

屬性值

IInputElement

捕捉 TouchDevice的元素。

範例

以下範例處理 TouchUp 發生在 Canvas的事件。 它會 Captured 檢查該屬性，以確認引發事件的裝置是否被擷取到 Canvas。 如果是，就會 TouchDevice 被釋放。

這個範例是類別概述中另一個較大範例 TouchDevice 的一部分。

private void canvas_TouchUp(object sender, TouchEventArgs e)
{
    Canvas _canvas = (Canvas)sender as Canvas;
    if (_canvas != null && e.TouchDevice.Captured == _canvas)
    {
        _canvas.ReleaseTouchCapture(e.TouchDevice);
    }
}

' Touch Up
Private Sub canvas_TouchUp(ByVal sender As System.Object, ByVal e As System.Windows.Input.TouchEventArgs)
    Dim _canvas As Canvas = CType(sender, Canvas)
    If (_canvas IsNot Nothing AndAlso e.TouchDevice.Captured Is _canvas) Then
        _canvas.ReleaseTouchCapture(e.TouchDevice)

    End If
End Sub