IOptions 未从 appsettings.Development.json 获取值

Question

我正在尝试使用 net core 创建网关 api。当我尝试使用 app.route 重定向呼叫时：

app.Run(async (context) =>
            {
                using (var serviceScope = app.ApplicationServices.CreateScope())
                {
                    var routing = serviceScope.ServiceProvider.GetService<IRoutingService>();

                    var content = await routing.RouteRequest(context.Request);
                    await context.Response.WriteAsync(await content.Content.ReadAsStringAsync());
                    content.Dispose();

                    // Seed the database.
                }
            });

... RoutingService 服务启动如下：

public class RoutingService : IRoutingService
    {
        private readonly RouteManagement _routeManagement;
        static HttpClient _client = new HttpClient();
        public RoutingService(IOptions<RouteManagement> routeManagement)
        {
            _routeManagement = routeManagement.Value;
        }
...

.. 我无法从 json 文件中获取值。以下是 json 文件：

{

  "tokenManagement": {
    "secret": "Any String used to sign and verify JWT Tokens,  Replace this string with your own Secret",
    "issuer": "threenine.co.uk",
    "audience": "SampleAudience",
    "accessExpiration": 30,
    "refreshExpiration": 60
  },
  "routeManagement": {
    "Routes": [
      {
        "Endpoint": "/coupons",
        "Destination": {
          "Uri": "http://localhost:30561/coupons/",
          "RequiresAuthentication": "true"
        }
      },
      {
        "Endpoint": "/songs",
        "Destination": {
          "Uri": "http://localhost:8091/songs/",
          "RequiresAuthentication": "false"
        }
      }
    ]
  }
}

我做错了吗？下面是classRouteManagement

public class RouteManagement
{
    public List<Routes> Routes { get; set; }
}
public class Routes
{
    public string Endpoint { get; set; }
    public Routes.DestinationManagement Destination { get; set; }


    public class DestinationManagement
    {
        private DestinationManagement()
        {
            Uri = "/";
            RequiresAuthentication = false;
        }
        public string Uri { get; set; }
        public bool RequiresAuthentication { get; set; }
    }

}

Answer 1

您是否在ConfigureServices方法中注册了RouteManagement绑定的配置实例？

services.Configure<RouteManagement>(Configuration);

Answer 2

按照以下步骤解决您的问题：

注册RouteManagement

services.Configure<RouteManagement>(Configuration.GetSection("routeManagement"));

需要使DestinationManagement()public，否则会初始化DestinationManagement

失败

public class RouteManagement
{
    public List<Routes> Routes { get; set; }
}
public class Routes
{
    public string Endpoint { get; set; }
    public Routes.DestinationManagement Destination { get; set; }


    public class DestinationManagement
    {
        public DestinationManagement()
        {
            Uri = "/";
            RequiresAuthentication = false;
        }
        public string Uri { get; set; }
        public bool RequiresAuthentication { get; set; }
    }

}

IOptions 未从 appsettings.Development.json 获取值

IOptions not getting the values from appsettings.Development.json

c#

asp.net-core

api-gateway