如何在.net 4.7中获取Iconfiguration和IHostingenvironment？

Question

I keep finding how to do this for .net core, but I am working on a library for netstandard and if i want to use this library in .net 4.7 as well how can I access the iconfiguration and the ihosting environment when I am in .net 4.7. I keep finding info that you need to do dependency injection to get it to work, but no one shows code examples of how it is done.

I keep finding these lines of code on all the info that I been reading, saying something about injecting them there:

    public class Startup
   {
    public void Configuration(IAppBuilder app)
    {
        var services = new ServiceCollection();
        ConfigureServices(services);
        var resolver = new DefaultDependencyResolver(services.BuildServiceProvider());
        DependencyResolver.SetResolver(resolver);
    }
     public void ConfigureServices(IServiceCollection services)
    {   
    }
}

how do I get the .net core iconfiguration/ihostingenvironment equivalent in .net 4.7+?

Answer 1

The startup code here is usually the .NET Core...for 4.7 with MVC, you usually call the DependencyResolver.SetResolver from the Global.asax ( Application_Start() method) using whatever DI framework you want (Unity, SimpleInjector, Autofac, etc).

Here is the suggested snippet from SimpleInjector:

// You'll need to include the following namespaces
using System.Web.Mvc;
using SimpleInjector;
using SimpleInjector.Integration.Web;
using SimpleInjector.Integration.Web.Mvc;

public class WebApiApplication : System.Web.HttpApplication
    // This is the Application_Start event from the Global.asax file.
    protected void Application_Start(object sender, EventArgs e) {

    // Create the container as usual.
    var container = new Container();
    container.Options.DefaultScopedLifestyle = new WebRequestLifestyle();


    // Register your types, for instance:
    container.Register<IUserRepository, SqlUserRepository>(Lifestyle.Scoped);

    // This is an extension method from the integration package.
    container.RegisterMvcControllers(Assembly.GetExecutingAssembly());

    container.Verify();

    DependencyResolver.SetResolver(new SimpleInjectorDependencyResolver(container));
}

From: https://simpleinjector.readthedocs.io/en/latest/mvcintegration.html?highlight=mvc

UPDATE

The IHostingConfiguration and IConfiguration are interfaces only implemented with .NET Core and are unavailable in .NET 4.7.