通过代码无法正常添加LongListSelector

Question

我在Silverlight中通过代码添加LongListSelector时遇到问题。这是代码：

PivotItem pi = new PivotItem();
pi.Header = r.Recipe_Title;

LongListSelector lls = new LongListSelector();
lls.Background = new SolidColorBrush(Colors.Transparent);
lls.ItemTemplate = App.Current.Resources["CheckboxShoppingItemTemplate"] as DataTemplate;
lls.ListHeaderTemplate = App.Current.Resources["citiesListHeader"] as DataTemplate;
lls.GroupFooterTemplate = App.Current.Resources["citiesListFooter"] as DataTemplate;
lls.GroupHeaderTemplate = App.Current.Resources["groupHeaderTemplate"] as DataTemplate;
lls.GroupItemTemplate = App.Current.Resources["groupItemTemplate"] as DataTemplate;
lls.ItemsSource = r.Ingredients;
pi.Content = lls;

显示透视标题，但列表不显示。我只看到列表的标题，但没有别的。尽管页脚是正确的，页脚也会丢失（我已经用页脚替换页眉以查看它是否正确，并且确实如此）。

Answer 1

http://www.windowsphonegeek.com/articles/wp7-longlistselector-in-depth--part1-visual-structure-and-api

这应该对你有帮助..内容真的很好..