Question

I’m using a service from my OnApplicationStarted inside my Global.ascx.cs file. Is there a way to dependency inject the repository from there?

My code:

public class MvcApplication : NinjectHttpApplication
{
    //Need to dependency inject this.
    private IBootStrapService bootService;

    protected override void OnApplicationStarted()
    {
        //Used to set data such as user roles in database on a new app start.
        bootService.InitDatabase();

        base.OnApplicationStarted();

        AreaRegistration.RegisterAllAreas();
        RegisterGlobalFilters(GlobalFilters.Filters);
        RegisterRoutes(RouteTable.Routes);
    }

    internal class SiteModule : NinjectModule
    {
        public override void Load()
        {
            //I set my bindings here.
            Bind<IBootStrapService>().To<BootStrapService>();
            Bind<IUserRepository>().To<SqlServerUserRepository>()
                .WithConstructorArgument("connectionStringName", "MyDb");
        }
    }
}

So how do I get ninject to do DI right inside the app start? As you can see, I setup my bindings in the SiteModule class.

Answer 1

You could override the CreateKernel method where you would register your modules:

protected override IKernel CreateKernel()
{
    return new StandardKernel(
        new INinjectModule[] 
        { 
            new SiteModule()
        }
    );
}

This will not automatically inject the bootService field though. You could instantiate it like this:

protected override void OnApplicationStarted()
{
    base.OnApplicationStarted();

    //Used to set data such as user roles in database on a new app start.
    var bootService = Kernel.Get<IBootStrapService>();
    bootService.InitDatabase();

    AreaRegistration.RegisterAllAreas();
    RegisterGlobalFilters(GlobalFilters.Filters);
    RegisterRoutes(RouteTable.Routes);
}