LongListSelector不显示ItemSource

Question

我对那个“新”长列表选择器控件有问题。我是从以前的基于工具箱的教程中做的:长列表选择器。

它显示标题，但不显示内容:/

Page1.xaml

<phone:LongListSelector Name="GroupedList">
   <phone:LongListSelector.ItemTemplate>
      <DataTemplate>
         <TextBlock Text="{Binding Name}" />
      </DataTemplate>
   </phone:LongListSelector.ItemTemplate>
   <phone:LongListSelector.GroupHeaderTemplate>
      <DataTemplate>
         <TextBlock Text="{Binding Name}" FontSize="32" Foreground="Green" />
      </DataTemplate>
   </phone:LongListSelector.GroupHeaderTemplate>
</phone:LongListSelector>

Page1.xaml.cs

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);
        if (GroupedList.ItemsSource == null)
        {
            System.Collections.Generic.List<Model.FoodCategory> foodCategories =
                    new System.Collections.Generic.List<Model.FoodCategory>();

            /*---Make burger items---*/
            Model.FoodCategory burgers = new Model.FoodCategory("Burgers");
            burgers.AddFoodItem(new Model.FoodItem("Hamburger"));
            burgers.AddFoodItem(new Model.FoodItem("Chicken burger"));
            burgers.AddFoodItem(new Model.FoodItem("Turkey burger"));
            burgers.AddFoodItem(new Model.FoodItem("Black bean burger"));

            /*---Make fryer items---*/
            Model.FoodCategory fryer = new Model.FoodCategory("Fryer");
            fryer.AddFoodItem(new Model.FoodItem("Fries"));
            fryer.AddFoodItem(new Model.FoodItem("Onion rings"));
            fryer.AddFoodItem(new Model.FoodItem("Tater tots"));
            fryer.AddFoodItem(new Model.FoodItem("Mozzarella sticks"));

            /*---Make fish items---*/
            Model.FoodCategory fish = new Model.FoodCategory("Fish");
            fish.AddFoodItem(new Model.FoodItem("Salmon"));
            fish.AddFoodItem(new Model.FoodItem("Rainbow trout"));
            fish.AddFoodItem(new Model.FoodItem("Grilled tilapia"));

            foodCategories.Add(burgers);
            foodCategories.Add(fryer);
            foodCategories.Add(fish);

            GroupedList.ItemsSource = foodCategories;
        }
    }

Model/FoodItem.cs

class FoodItem
{
    public string Name { get; private set; }

    public FoodItem(string foodName)
    {
        Name = foodName;
    }
}

Model/FoodCategory.cs

class FoodCategory
{
    public string Name { get; private set; }
    public System.Collections.Generic.List<FoodItem> Items { get; private set; }

    public FoodCategory(string categoryName)
    {
        Name = categoryName;
        Items = new System.Collections.Generic.List<FoodItem>();
    }

    public void AddFoodItem(FoodItem foodItem)
    {
        Items.Add(foodItem);
    }

    public System.Collections.IEnumerator GetEnumerator()
    {
        return this.Items.GetEnumerator();
    }
}

Answer 1

尝试将您的TextBlock放在<ContentControl> </ContentControl>中