UWP绑定异步加载的数据

// 定义一个ViewModel类
public class MainViewModel : INotifyPropertyChanged
{
    private ObservableCollection<string> _dataList;
    public ObservableCollection<string> DataList
    {
        get { return _dataList; }
        set
        {
            _dataList = value;
            OnPropertyChanged(nameof(DataList));
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    // 异步加载数据的方法
    public async Task LoadDataAsync()
    {
        var data = await FetchDataFromServerAsync();
        DataList = new ObservableCollection<string>(data);
    }

    private async Task<List<string>> FetchDataFromServerAsync()
    {
        // 模拟网络请求
        await Task.Delay(2000);
        return new List<string> { "Item 1", "Item 2", "Item 3" };
    }
}

// 在XAML中绑定数据
<Page
    x:Class="YourNamespace.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <ListView ItemsSource="{x:Bind ViewModel.DataList}">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding}" />
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </Grid>
</Page>

// 在代码后台中初始化ViewModel并加载数据
public sealed partial class MainPage : Page
{
    public MainViewModel ViewModel { get; } = new MainViewModel();

    public MainPage()
    {
        this.InitializeComponent();
        LoadData();
    }

    private async void LoadData()
    {
        await ViewModel.LoadDataAsync();
    }
}