MenuItem.SubmenuOpened 事件
定义
重要
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在 IsSubmenuOpen 属性的状态更改为 true 时发生。
public:
event System::Windows::RoutedEventHandler ^ SubmenuOpened;public event System.Windows.RoutedEventHandler SubmenuOpened;member this.SubmenuOpened : System.Windows.RoutedEventHandler Public Custom Event SubmenuOpened As RoutedEventHandler 事件类型
示例
以下示例演示如何调用和处理 SubmenuOpened 事件。
<MenuItem Name="submenu" Header="Menu with Submenu"
SubmenuOpened="OnSubmenuOpened"
SubmenuClosed="OnSubmenuClosed">
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
注解
路由事件信息
| 标识符字段 | SubmenuOpenedEvent |
| 路由策略 | 鼓 泡 |
| 委托 | RoutedEventHandler |
