将ListView绑定到三层深的对象列表

本文关键字：三层 对象 列表 绑定 ListView | 更新日期: 2023-09-27 18:00:18

我正在开发Windows Phone 8.1应用程序（非SL），我有以下型号：

Quiz
    -- Question
        -- Text
        -- Options
            Options 1 (name, value)
            Options 2 (name, value)
            Options 3 (name, value)

在我的XAML页面中，我有一个ListView。我正试图将选项列表绑定到它，就像这样：

<Page.Resources>
    <DataTemplate x:Key="TemplateOptions">
        <TextBlock Text="{ Binding Name }" FontSize="25" HorizontalAlignment="Center" VerticalAlignment="Center" TextAlignment="Center" Foreground="Black" FontWeight="Bold"></TextBlock>
    </DataTemplate>
</Page.Resources>
<ListView Grid.Row="1" ItemsSource="{Binding Question.Options}" ItemTemplate="{StaticResource TemplateOptions}"></ListView>

但这行不通！运行应用程序时，列表为空。我做错了什么？

感谢

将ListView绑定到三层深的对象列表

我让它像这样工作：

CodeBehind:

public sealed partial class MainPage : Page
{
    public class Quiz
    {
        public Question Question { get; set; }
    }
    public MainPage()
    {
        this.InitializeComponent();
        var options = new List<Option>();
        options.Add(new Option { name = "foo", value = "bar" });
        options.Add(new Option { name = "foo", value = "bar" });
        options.Add(new Option { name = "foo", value = "bar" });
        options.Add(new Option { name = "foo", value = "bar" });
        var question = new Question
        {
            Text = "Question 1",
            Options = new ObservableCollection<Option>(options)
        };

        this.DataContext = new Quiz { Question = question };
    }
    /// <summary>
    /// Invoked when this page is about to be displayed in a Frame.
    /// </summary>
    /// <param name="e">Event data that describes how this page was reached.
    /// This parameter is typically used to configure the page.</param>
    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
    }
}
public class Question
{
    public string Text { get; set; }
    public ObservableCollection<Option> Options { get; set; }
}
public class Option
{
    public string name { get; set; }
    public string value { get; set; }
}

主页.xaml

<Page.Resources>
    <DataTemplate x:Key="TemplateOptions">
        <TextBlock Text="{Binding name}" FontSize="25" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="Black" FontWeight="Bold"></TextBlock>
    </DataTemplate>
</Page.Resources>
<Grid Background="White">
    <ListView ItemsSource="{Binding Question.Options}" ItemTemplate="{StaticResource TemplateOptions}"></ListView>
</Grid>
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