Xamarin forms:如何在列表视图中获取所选选择器模型数据？

// 定义数据模型
public class ItemModel
{
    public string Name { get; set; }
    public string SelectedValue { get; set; }
}

// 在页面中定义 ListView
<ListView x:Name="listView" ItemsSource="{Binding Items}" ItemTapped="OnItemTapped">
    <ListView.ItemTemplate>
        <DataTemplate>
            <ViewCell>
                <StackLayout Orientation="Horizontal">
                    <Label Text="{Binding Name}" />
                    <Picker x:Name="picker" SelectedItem="{Binding SelectedValue}" Title="Select Value">
                        <Picker.ItemsSource>
                            <x:Array Type="{x:Type x:String}">
                                <x:String>Option 1</x:String>
                                <x:String>Option 2</x:String>
                                <x:String>Option 3</x:String>
                            </x:Array>
                        </Picker.ItemsSource>
                    </Picker>
                </StackLayout>
            </ViewCell>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

// 在代码后台中处理 ItemTapped 事件
private void OnItemTapped(object sender, ItemTappedEventArgs e)
{
    if (e.Item is ItemModel item)
    {
        string selectedValue = item.SelectedValue;
        // 处理所选值
        Console.WriteLine($"Selected value: {selectedValue}");
    }
}