c# - 菜单项打开和关闭事件

Question

每当菜单项的子菜单打开时，我想处理一个事件。关闭也一样。我该怎么做？

Answer 1

非常简单。订阅 MenuItem 的 SubmenuOpened 事件。传统方法:

MidItem.SubmenuOpened += new RoutedEventHandler(MidItem_SubmenuOpened);

private void MidItem_SubmenuOpened(object sender, RoutedEventArgs e)
{
    //Menu Open Logic Here
}

或者很酷的动态方法:

MidItem.SubmenuOpened += delegate(object sender, RoutedEventArgs e)
{
    //Menu Open Logic Here
};