read appsettings.json-字段保持为空

我觉得startup.cs有问题,因为我没有从我的 <IOption> config

所以…我们有自己的 应用设置.json

"Config": {
    "ApplicationName": "some name",
    "ConnectionString": "someconstring",
    "Version": "1.0.0"
  },

这是我们的 模型

public class Config
    {   
        public string ApplicationName { get; set; }
        public string ConnectionString { get; set; }
        public string Version { get; set; }
    }

新星CS

 public Startup(IConfiguration configuration)

    {
        Configuration = configuration;
    }



public static IConfiguration Configuration { get; set; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc();
        // Add functionality to inject IOptions<T>
        services.AddOptions();

        // Add our Config object so it can be injected
        services.Configure<Config>(Configuration);
    }

然后在我们的 控制器 我试图加载这些数据,但不幸的是它们仍然是空的。

   private IOptions<Config> config;
            public CompaniesController(IOptions<Config> config)
            {
                this.config = config;
            }

我尝试用类似

 services.Configure<Config>(options =>
            {
                options.ConnectionString = Configuration.GetSection("Config:ConnectionString").Value;
            });

但这似乎行不通。

资源 我一直在使用:

https://dzone.com/articles/dynamic-connection-string-in-net-core

https://stackoverflow.com/questions/31453495/how-to-read-appsettings-values-from-json-file-in-asp-net-core

https://docs.microsoft.com/en-us/aspnet/core/fundamentals/configuration/options?view=aspnetcore-2.2

但很明显我错过了一个关键点。

编辑:我正在使用ASP.NET核心2.0

编辑2:

这个 程序CS

public class Program
    {
        public static void Main(string[] args)
        {
            BuildWebHost(args).Run();
        }

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .Build();
    }

整个 应用设置.json 文件

{
  "Config": {
    "ApplicationName": "somename",
    "ConnectionString": "someconstring",
    "Version": "1.0.0"
  },
  "Logging": {
    "IncludeScopes": false,
    "Debug": {
      "LogLevel": {
        "Default": "Warning"
      }
    },
    "Console": {
      "LogLevel": {
        "Default": "Warning"
      }
    }
  }
}

编辑3: 在我的前端应用程序中,我像这样导入API。