ASP.NET Core 奇淫技巧之伪属性注入的实现

public interface IUserAppService:IAppService { void Create(); } public class UserAppService : AppService,IUserAppService { public void Create() { Logger.LogInformation("来自 Application Service 的日志"); } }

定义特殊的注册服务的方法，以便实现 Resolve 为 Logger 赋值

public static class ServiceExtensions { public static IServiceCollection AddApplicationService<TService, TImpl>(this IServiceCollection services) where TService:IAppService where TImpl:AppService { services.AddApplicationService(typeof(TService), typeof(TImpl)); return services; } // 可以反射程序集调用此方法实现批量自动注册应用服务 public static IServiceCollection AddApplicationService(this IServiceCollection services, Type serviceType,Type implType) { services.AddTransient(serviceType, sp => { //获取服务实现的实例 var implInstance = ActivatorUtilities.CreateInstance(sp, implType); ; if (implInstance is AppService obj) { //为 Logger 赋值 obj.Logger= sp.GetRequiredService<ILoggerFactory>().CreateLogger(implType); } return implInstance; }); return services; }

注册测试服务

Controller 注入测试服务

运行测试

七.结束

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