如何阅读 Service Fabric 解决方案的 appsetting.json？

Question

我有一个 Service Fabric API 作为服务，业务和数据访问层是一个单独的 class 库。我在 appsetting.json 中设置配置值。但是我无法读取业务层和数据访问层中的值。另外，我不想使用环境变量。如何读取数据访问层和业务层的appsetting.json？

Answer 1

将 IConfiguration object 作为构造函数参数传递给 API 控制器。将其向下游传递给其他 类.

Answer 2

将此行添加到 CreateServiceInstanceListeners

        protected override IEnumerable<ServiceInstanceListener> CreateServiceInstanceListeners()
    {
        return new ServiceInstanceListener[]
        {
            new ServiceInstanceListener(serviceContext =>
                new KestrelCommunicationListener(serviceContext, "ServiceEndpoint", (url, listener) =>
                {
                    ServiceEventSource.Current.ServiceMessage(serviceContext, $"Starting Kestrel on {url}");

                    return new WebHostBuilder()
                                .UseKestrel()
                                .UseCommonConfiguration()
                                .ConfigureServices(
                                    services => services
                                        .AddSingleton<StatelessServiceContext>(serviceContext))
                                .UseContentRoot(Directory.GetCurrentDirectory())
                                .UseStartup<Startup>()
                                .UseServiceFabricIntegration(listener, ServiceFabricIntegrationOptions.None)
                                .UseUrls(url)
                                .Build();
                }))
        };
    }

使用通用配置

        public static IWebHostBuilder UseCommonConfiguration(this IWebHostBuilder builder)
    {
        builder.ConfigureAppConfiguration((hostingContext, config) =>
        {
            var env = hostingContext.HostingEnvironment;

            config.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true, reloadOnChange: true);

            if (env.IsDevelopment())
            {
                var appAssembly = Assembly.Load(new AssemblyName(env.ApplicationName));
                if (appAssembly != null)
                {
                    config.AddUserSecrets(appAssembly, optional: true);
                }
            }

            config.AddEnvironmentVariables();
        });

        return builder;
    }