MenuItem.OnSubmenuOpened(RoutedEventArgs) 方法

定义

命名空间:

System.Windows.Controls

程序集:

PresentationFramework.dll

在打开 MenuItem 的子菜单时调用。

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)

参数

e

RoutedEventArgs

SubmenuOpened 事件的事件数据。

示例

此示例演示如何使用 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