Register all the services at once using Default DI Container from ASP.NET 5 similar to Autofac

Question

With ASP.NET 5, there's already a DI shipped as default and it looks interesting. I have been using Autofac with MVC 5 which has the option to register all the assembly at once. Here is a sample code that register all the classes that ends with "Service" in Autofac.

// Autofac Configuration for API
var builder = new ContainerBuilder();

builder.RegisterModule(new ServiceModule());

...
...

builder.RegisterAssemblyTypes(Assembly.Load("IMS.Service"))
                      .Where(t => t.Name.EndsWith("Service"))
                      .AsImplementedInterfaces()
                      .InstancePerLifetimeScope();

My question is, is there any thing similar to this in Default DI container from asp.net 5 where you can register all the services at once ?

Answer 1

It might surprise you that most of what you need can be done in few lines without reliance on third-party packages!.. Once someone else has figured out what those few lines should be 😀

For example, here is a handful of concise DI extensions from Autofac and NetCore.AutoRegisterDi (all methods are annotated with source links). It lets you write registration logic like (example):

var types = typeof(BaseService<>).Assembly
                        .GetTypes()
                        .Where(t =>
                                !t.IsAbstract &&
                                t.IsClosedTypeOf(typeof(BaseService<>)))
                        ).ToList();
services.RegisterAsImplementedInterfaces(types, ServiceLifetime.Scoped);

This blog post, .NET Core project without Autofac, has more examples and covers limitations if you want take one level further.

Answer 2

My question is, is there any thing similar to this in Default DI container from asp.net 5 where you can register all the services at once ?

Not OOTB, but Kristian Hellang created a cool package named Scrutor that adds assembly scanning capabilities to the built-in container. You can find it on NuGet.org.

services.Scan(scan => scan
    .FromAssemblyOf<ITransientService>()
        .AddClasses(classes => classes.AssignableTo<ITransientService>())
            .AsImplementedInterfaces()
            .WithTransientLifetime()
        .AddClasses(classes => classes.AssignableTo<IScopedService>())
            .As<IScopedService>()
            .WithScopedLifetime());