語言

MenuItem.OnSubmenuOpened(RoutedEventArgs) 方法

定義

命名空間:
System.Windows.Controls
組件:
PresentationFramework.dll

當 a MenuItem 的子選單被打開時就會被呼叫。

protected:
 virtual void OnSubmenuOpened(System::Windows::RoutedEventArgs ^ e);
protected virtual void OnSubmenuOpened(System.Windows.RoutedEventArgs e);
abstract member OnSubmenuOpened : System.Windows.RoutedEventArgs -> unit
override this.OnSubmenuOpened : System.Windows.RoutedEventArgs -> unit
Protected Overridable Sub OnSubmenuOpened (e As RoutedEventArgs)

參數

e
RoutedEventArgs

活動資料 SubmenuOpened 。

範例

這個範例展示了如何使用這個 OnSubmenuOpened 方法。

private void OnSubmenuOpened(object sender, RoutedEventArgs e)
{

    if (sender == e.Source)
    {
        textBlock1.Text = "Submenu is open.";
    }
}

Private Sub OnSubmenuOpened(ByVal sender As Object, ByVal e As RoutedEventArgs)

    If sender Is e.Source Then
        textBlock1.Text = "Submenu is open."
    End If
End Sub

適用於