Xamarin.Forms如何双向绑定到列表视图中的控件

// Person.cs
public class Person : BindableObject
{
    public static readonly BindableProperty NameProperty =
        BindableProperty.Create(nameof(Name), typeof(string), typeof(Person), string.Empty);

    public static readonly BindableProperty AgeProperty =
        BindableProperty.Create(nameof(Age), typeof(int), typeof(Person), 0);

    public string Name
    {
        get { return (string)GetValue(NameProperty); }
        set { SetValue(NameProperty, value); }
    }

    public int Age
    {
        get { return (int)GetValue(AgeProperty); }
        set { SetValue(AgeProperty, value); }
    }
}

// MainPage.xaml
<ListView ItemsSource="{Binding People}">
    <ListView.ItemTemplate>
        <DataTemplate>
            <ViewCell>
                <StackLayout>
                    <Label Text="{Binding Name, Mode=TwoWay}" />
                    <Entry Text="{Binding Age, Mode=TwoWay}" />
                </StackLayout>
            </ViewCell>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

// MainPage.xaml.cs
public partial class MainPage : ContentPage
{
    public ObservableCollection<Person> People { get; set; }

    public MainPage()
    {
        InitializeComponent();

        People = new ObservableCollection<Person>
        {
            new Person { Name = "John", Age = 25 },
            new Person { Name = "Alice", Age = 30 }
        };

        BindingContext = this;
    }
}