How to integrate this with OwinStartup?

[Ken Hadden]

I've got my old web forms project setup to now include MVC. And I have automatic startup via OwinStartup:

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Owin;
using Owin;
using System.Web.Mvc;

[assembly: OwinStartup( typeof( ProvPubs.Compline.Web.Startup ) )]
namespace ProvPubs.Compline.Web
{
	public partial class Startup
	{
		public void Configuration( IAppBuilder app )
		{
			var services = new ServiceCollection( );
			ConfigureServices( services );
			var resolver = new DefaultDependencyResolver( services.BuildServiceProvider( ) );
			DependencyResolver.SetResolver( resolver );
			ConfigureAuth( app );
		}
	}
}

My services are registered in a partial (Startup) class.
But since my startup is automatically called by the framework, how would I incorporate your project such that I can use constructor di in aspx pages?

[Dai]

@cosmoKenney You'll want to use WebActivatorEx and perform service configuration there instead of in OWIN startup, as per the examples in the documentation.

This is because WebActivatorEx.PreStart runs before OwinStartup: https://stackoverflow.com/questions/21462777/webactivatorex-vs-owinstartup

The ASP.NET MVC functionality in AspNetDependencyInjection.Mvc (which implements IDependencyResolver) doesn't work right now, but I've got a fix in the works I'll publish shortly - in a few hours.

So your code would look like this:

using Microsoft.Extensions.DependencyInjection;
using Microsoft.Owin;
using Owin;
using System.Web.Mvc;
using AspNetDependencyInjection;

[assembly: PreApplicationStartMethod ( typeof( global::ProvPubs.Compline.Web.Startup ), methodName: nameof( global::ProvPubs.Compline.Web.Startup.PreStart  ) )]
[assembly: OwinStartup( typeof( ProvPubs.Compline.Web.Startup ) )]

namespace ProvPubs.Compline.Web
{
	public partial class Startup
	{
                private static MvcApplicationDependencyInjection _di;
                public static void PreStart()
                {
                    _di = MvcApplicationDependencyInjection.ConfigureMvc( ConfigureServices );
                }

                private static void ConfigureServices( IServiceCollection services )
		{
			// TODO: Add any dependencies needed here
			services
				// Useful services built-in to AspNetDependencyInjection:
				.AddDefaultHttpContextAccessor() // Adds `IHttpContextAccessor`
				.AddWebConfiguration() // Adds `IWebConfiguration`
			;
		}

		public void Configuration( IAppBuilder app )
		{
			ConfigureAuth( app );
		}
	}
}

[Dai]

@cosmoKenney Did my reply help? May I close this issue now?

[Ken Hadden]

Yes I believe so.