从配置文件中读取 Json 个对象的列表并 return 它在控制器中总是 return null

Question

我有这样的 GameSettingOptions class：

public class GameSettingOptions
    {
        public int gameId { get; set; }
        public string iconSize { get; set; }
        public int sortOrder { get; set; }
        public string[] chips { get; set; }
    }

我正在尝试从这样设置的服务中检索它：

 public Startup(IConfiguration configuration, IHostingEnvironment environment)
        {
            
            var builder = new ConfigurationBuilder()
                .SetBasePath(environment.ContentRootPath)
                .AddJsonFile("GameSettingOptions.json", optional: true, reloadOnChange: true);
            Configuration = builder.Build();
        }
public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();
            services.AddCors(c =>
            {
                c.AddPolicy("AllowOrigin", options => options.AllowAnyOrigin());
            });
            services.Configure<GameSettingOptions>(Configuration.GetSection("GameSettings"));
        }

这是我的 json 对象，其中游戏设置是一个数组：

{
  "GameSettings": [
    {
      "gameId": 1,
      "iconSize": "big",
      "sortOrder": 6
    },
    {
      "gameId": 2,
      "iconSize": "small",
      "sortOrder": 4
    }
  ]
}

这就是我尝试使用此控制器和依赖项注入来检索它的方式

public class GameSettingsControllers : ControllerBase
    {
        private readonly GameSettingOptions Options;
        public GameSettingsControllers(IOptionsSnapshot<GameSettingOptions> options)
        {
            Options = options.Value;

        }

        public object GetGameSettings()
        {
            
                return new JsonResult($"gameId: {Options.gameId}, " + $"iconSize: {Options.iconSize}, "
                    + $"sortOrder: {Options.sortOrder}, " + $"chips: {Options.chips} ");
          
        }
    }

我试过的：

把服务和消费服务的属性都变成List，这个returns null

services.Configure<List<GameSettingOptions>>(Configuration.GetSection("GameSettings"));
IOptions<List<GameSettingOptions>>

创建另一个具有 GameSettingOptions 属性集合的 class，然后我绑定并注入新的 class，这也是 returns null

public class GameSettings
{
  public GameSettingsOptions[] AllGameSettings {get; set;}
}

public class GameSettingOptions
    {
        public int gameId { get; set; }
        public string iconSize { get; set; }
        public int sortOrder { get; set; }
        public string[] chips { get; set; }
    }

对于控制器，我尝试执行 IOptions 值的 foreach，但它说 GameSetingsOptions foes 不包含 public 实例或 'GetEnumerator'

Answer 1

请按如下所示定义GameSettingsOtions

public class GameSettingOptions: List<GameSetting>
{
}

public class GameSetting
{
    public int gameId { get; set; }
    public string iconSize { get; set; }
    public int sortOrder { get; set; }
    public string[] chips { get; set; }
}

现在配置它，使用下面的代码ConfigureServices方法：

services.Configure<GameSettingOptions>(options => Configuration.GetSection("GameSettings").Bind(options));

在上面你可以看到定义的选项被注入了。这是我调试的截图：

这是我的appsettings.json文件供参考：

{
    "Logging": {
        "LogLevel": {
            "Default": "Information",
            "Microsoft": "Warning",
            "Microsoft.Hosting.Lifetime": "Information"
        }
    },
    "AllowedHosts": "*",
    "MySettings": {
        "SettingValue": 2
    },
    "GameSettings": [
        {
            "gameId": 1,
            "iconSize": "big",
            "sortOrder": 6
        },
        {
            "gameId": 2,
            "iconSize": "small",
            "sortOrder": 4
        },
        {
            "gameId": 3,
            "iconSize": "medium",
            "sortOrder": 2
        },
        {
            "gameId": 4,
            "iconSize": "small",
            "sortOrder": 5
        },
        {
            "gameId": 5,
            "iconSize": "small",
            "sortOrder": 8,
            "chips": []
        },
        {
            "gameId": 6,
            "iconSize": "small",
            "sortOrder": 7
        },
        {
            "gameId": 7,
            "iconSize": "big",
            "sortOrder": 1,
            "chips": []
        }
    ]
}

从配置文件中读取 Json 个对象的列表并 return 它在控制器中总是 return null

Reading a List of Json Objects from config file and return it in the controller always return null

c#

configuration

json

app-config

options