jSonserializer.Deserialize to observableCollection

Question

我以JSON格式接收播放器列表API，我想在

PlayerListViewModel

中使用它，但是我不知道如何将其划分为播放器类。

public partial class PlayerListViewModel : ObservableObject
{
        
    public PlayerListViewModel(){

      PlayerListItems = new ObservableCollection<Player>();

    }
    
     [ObservableProperty]
     ObservableCollection<Player> playerListItems;
}

[RelayCommand]
async Task getPlayersAPI()
{
     var response = await _httpClient.GetAsync(_url);
     var responseString = await response.Content.ReadAsStringAsync();
     playerListItems = JsonSerializer.Deserialize<Player>(responseString);
     //playerListItems = JsonSerializer.Deserialize<List<Player>>(responseString);  
}

玩家class

public class Player
{  
    public int Id {  get; set; }
    public required string fullName { get; set; }
    public required string imageSrc { get; set; }
    public required string countryFlag { get; set; }    
}

data收到了示例

[
  {
    "Id": 577,
    "fullName": "Bob Smith",
    "imageSrc": "ProfileImage.webp",
    "countryFlag": "us.svg"
  },
  {
    "Id": 744,
    "fullName": "George Kingford",
    "imageSrc": "ProfileImage.webp",
    "countryFlag": "ca.svg"
  }
]

我如何填充playerListItems，以便我可以将其绑定到我的XAML表单。

我遇到的具体错误超过了jsonserializer.deserialize

Cannot implicitly convert type '...Player' to 'System.Collections.ObjectModel.ObservableCollection...<Player>'

如果您的问题是您不知道如何填充

Answer 1

您可以尝试以下方法：

public partial class PlayerListViewModel : ObservableObject
{
    private readonly HttpClient _httpClient;
    private readonly string _url = "https://api.example.com/players"; // Replace with your API URL

    public PlayerListViewModel()
    {
        _httpClient = new HttpClient();
        PlayerListItems = new ObservableCollection<Player>();    
    }

    [ObservableProperty]
    private ObservableCollection<Player> playerListItems;

    [RelayCommand]
    private async Task GetPlayersAPI()
    {
        
         var response = await _httpClient.GetAsync(_url);
         response.EnsureSuccessStatusCode();

          var responseString = await response.Content.ReadAsStringAsync();
          var players = JsonSerializer.Deserialize<List<Player>>(responseString);

          PlayerListItems.Clear();
          foreach (var player in players)
          {
              PlayerListItems.Add(player);
          }      
    }
}