如何在DisplayActionSheet Xamarin中显示JSON数据？

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Net.Http;
using Xamarin.Forms;

public partial class MainPage : ContentPage
{
    public MainPage()
    {
        InitializeComponent();
    }

    protected override async void OnAppearing()
    {
        base.OnAppearing();

        // 1. 下载JSON数据
        string json = await DownloadJsonData();

        // 2. 反序列化JSON数据
        List<MyData> data = JsonConvert.DeserializeObject<List<MyData>>(json);

        // 3. 提取数据并创建字符串列表
        List<string> options = new List<string>();
        foreach (var item in data)
        {
            options.Add(item.Name);
        }

        // 4. 显示ActionSheet
        string selectedOption = await DisplayActionSheet("Choose an option", "Cancel", null, options.ToArray());
        if (selectedOption != "Cancel")
        {
            // 处理选中的选项
            // ...
        }
    }

    private async Task<string> DownloadJsonData()
    {
        using (HttpClient client = new HttpClient())
        {
            var response = await client.GetAsync("http://example.com/data.json");
            if (response.IsSuccessStatusCode)
            {
                return await response.Content.ReadAsStringAsync();
            }
        }

        return null;
    }
}

public class MyData
{
    public string Name { get; set; }
    public string Description { get; set; }
    // 其他属性...
}