dahlbyk / Arex388.AspNet.Mvc.Startup

ASP.NET MVC "classic" dependency injection and service configuration extensions to simulate ASP.NET Core's Startup configuration

Arex388.AspNet.Mvc.Startup

This is a classic ASP.NET MVC helper library that started out as a way for me to use the Microsoft.Extensions.DependencyInjection NuGet package for dependency injection. As I worked on it, it dawned on me that with a little bit more nudging it can simulate ASP.NET Core's Startup.cs.

For a more detailed story about why this library came to be, please read my corresponding blog post here. I want to thank David Fowler and Scott Dorman for their code examples which I've taken, adapted, and mostly just glued together.

• David Fowler's Gist example code.
• Scott Dorman's Blog example code.
• The StackOverflow question that lead me to David and Scott.

I also want to thank Keith Dahlby for helping improve the library.

How to Use

1. Add the Arex388.AspNet.Mvc.Startup NuGet package.
2. Change your Global.asax.cs to inherit from StartupApplication.
3. Add [assembly: OwinStartup(typeof(YourNamespace.MvcApplication))] attribute to the namespace of your Global.asax.cs.
4. Implement the Configure and ConfigureServices methods inherited from StartupApplication.
5. Add ConfigureServices() to the end of Application_Start.

Here's a more complete example:

[assembly: OwinStartup(typeof(YourNamespace.MvcApplication))]
namespace YourNamespace {
    public class MvcApplication :
        StartupApplication {
        public override Configure(
            IAppBuilder app) {
            //	Add IAppBuilder configurations
        }

        public override void ConfigureServices(
            IServiceCollection services) {
            var assembly = typeof(MvcApplication).Assembly;

            //	Add your controllers
            services.AddControllers(assembly);

            //	Add other services that have IServiceCollection extensions
        }
    }
}

Changes

v1.0.6

• Added GetServiceProvider() extension on IAppBuilder. This extension provides access to the IServiceProvider when working with services in the Configure() method.
• Reverted back all dependencies on Microsoft.Extensions.DependencyInjection to v2.1.1. You can continue to use the latest (v5.0.2 as of this writing) with binding redirects.

Things to Consider

The only annoyance I've had so far is with Hangfire's IServiceCollection extensions because they're in the Hangfire.AspNetCore NuGet package and that forces a bunch of other NuGet packages to be added in. I can live with it for the simplicity in configuration and dependency registrations I get otherwise. Using Hangfire.NetCore package instead simplified this issue.