当鼠标指针进入MenuflyoutSubItem元素时会触发什么事件？

Question

当鼠标指针进入MenuFlyoutItem时会触发PointerEntered，但是当它进入MenuFlyoutSubItem时则不会触发。当鼠标指针进入MenuflyoutSubItem元素时会触发什么事件？我想在鼠标指针进入时捕获事件处理程序中的MenuflyoutSubItem元素的text属性。 （我不能依赖tapped事件的原因是因为即使只是悬停在MenuFlyoutSubItem上也会打开其包含的菜单项。）以下是代码：

public DynamicMenuTestPage()
    {
        InitializeComponent();

        for (int i = 0; i < 5; i++)
        {
            MenuFlyoutSubItem myItem = new MenuFlyoutSubItem();
            myItem.Text = "Item" + i;
            myItem.PointerEntered += MyItem_PointerEntered;        
            MyMenu.Items.Add(myItem);
            for (int j = 0; j < 4; j++)
            {
                MenuFlyoutItem mySubItem = new MenuFlyoutItem();
                mySubItem.Text = "SubItem" + j;
                mySubItem.PointerEntered += mySubItem_PointerEntered;
                myItem.Items.Add(mySubItem);
            }
        }
    }

    private void MyItem_PointerEntered(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e)
    {
        // This does not work.  It is not triggered when the mouse pointer enters the menu flyout subitem.
        MenuFlyoutSubItem test = sender as MenuFlyoutSubItem;
        var menuFlyoutSubItemText = test.Text;

    }

    private void mySubItem_PointerEntered(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e)
    {   //This works. It is triggered when the mouse pointer enters the menu flyout item.
        MenuFlyoutItem test = sender as MenuFlyoutItem;
        var menuFlyoutItemText = test.Text;

    }

这是菜单的屏幕截图。当我将鼠标悬停在Item0上时，以红色圈出，子菜单打开。什么事件将使我能够捕获文本，＆＃34; Item0＆＃34;？