在 Panorama 页面中添加 ApplicationBar

   因为默认在 Panorama 控件中，是不推荐使用 ApplicationBar 的，经过探索，研究了如下方法，并在 Panorama 控件需要的 Item

中显示 ApplicationBar：

       ApplicationBar appBar;
        ApplicationBarIconButton btnAppBarRefresh;
        ApplicationBarIconButton btnAppBarSearch;
        ApplicationBarMenuItem menuItem1;
        ApplicationBarMenuItem menuItem2;


#region ApplicationBar
            appBar = new ApplicationBar();
            appBar.Mode = ApplicationBarMode.Default;
            appBar.Opacity = 0.5;
            appBar.IsVisible = true;
            appBar.IsMenuEnabled = true;
                       
            btnAppBarRefresh = new ApplicationBarIconButton();
            btnAppBarRefresh.IsEnabled = false;
            btnAppBarRefresh.IconUri = new Uri("/Icons/appbar.refresh.rest.png", UriKind.Relative);
            btnAppBarRefresh.Text = "Refresh";
            btnAppBarRefresh.Click += new EventHandler(btnAppBarRefresh_Click);
            appBar.Buttons.Add(btnAppBarRefresh);

            btnAppBarSearch = new ApplicationBarIconButton();
            btnAppBarSearch.IconUri = new Uri("/Icons/appbar.feature.search.rest.png", UriKind.Relative);
            btnAppBarSearch.Text = "Search";
            btnAppBarSearch.Click += new EventHandler(btnAppBarSearch_Click);
            appBar.Buttons.Add(btnAppBarSearch);

            menuItem1 = new ApplicationBarMenuItem();
            menuItem1.Text = "Refresh";

            menuItem2 = new ApplicationBarMenuItem();
            menuItem2.Text = "Search";

            appBar.MenuItems.Add(menuItem1);
            appBar.MenuItems.Add(menuItem2);
            #endregion

调用：

 private void Panorama_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {            
            if (panorama_mainpage.SelectedIndex == 1 || panorama_mainpage.SelectedIndex == 2)
            {
                this.ApplicationBar = appBar;
            }
            else
            {
                this.ApplicationBar = null;
            }
        }