private void StackPanel_Tap(object sender, TappedRoutedEventArgs e)    {         //获取到的对象是ListBoxItem         ListBoxItem myListBoxItem =  (ListBoxItem)(listbox.ItemContainerGenerator.ContainerFromItem((sender as Panel).DataContext));         // 在ListBoxItem中查找ContentPresenter         ContentPresenter myContentPresenter = FindVisualChild<ContentPresenter>(myListBoxItem);        ……//省略若干代码    }    //查找可视化树某个类型的元素    private childItem FindVisualChild<childItem>(DependencyObject obj) where childItem : DependencyObject    {        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)        {            DependencyObject child = VisualTreeHelper.GetChild(obj, i);            if (child != null && child is childItem)                return (childItem)child;            else            {                childItem childOfChild = FindVisualChild<childItem>(child);                if (childOfChild != null)                    return childOfChild;            }        }        return null;    }

Windows Phone 中查找可视化树中的某个类型的元素