“没有为此对象定义无参数的构造函数。”对于使用结构映射的控制器中的IBus

Question

I'm trying to setup StructureMap with NServiceBus. I've downloaded all the packages and NuGet created some files for me:

Here is the code in those files

IoC.cs:

public static class IoC {
    public static IContainer Initialize() {
        var cont = new Container();
        cont.Configure(x =>
                    {
                        x.Scan(scan =>
                                {
                                    scan.TheCallingAssembly();
                                    scan.WithDefaultConventions();
                                });
                        //x.For<IExample>().Use<Example>();
                    });
        return cont;
    }
}

StructureMap.cs:

[assembly: WebActivator.PreApplicationStartMethod(typeof(MyProjectName.App_Start.StructuremapMvc), "Start")]

namespace MyProjectName.App_Start {
    public static class StructuremapMvc {
        public static void Start() {
            IContainer container = IoC.Initialize();
            DependencyResolver.SetResolver(new StructureMapDependencyResolver(container));
            GlobalConfiguration.Configuration.DependencyResolver = new StructureMapDependencyResolver(container);
        }
    }
}

Didn't change anything, so those files are the way, they were created. Then I added a constructor in one of my controllers:

public class ProductsController : Controller
{
    private readonly IBus _bus;

    public ProductsController(IBus bus)
    {
        _bus = bus;
    }

    public ActionResult Index()
    {
        ViewBag.Title = "Product list";

        var message = new ProductMessage();
        _bus.Send(message);

        return View();
    }
}

That's when I got the error

No parameterless constructor defined for this object.

which is weird, since this line

scan.WithDefaultConventions();

should exclude this issue if I'm trying to inject IBus.

What have I already tried:

• Removing [assembly: ...] from StructuremapMvc.cs and calling StructuremapMvc.Start() from Global.asax. Same result.

• Added parameterless constructor to the controller with following in it's body:

  _bus = _bus = new Container().GetInstance< IBus>();

  but _bus was still null and I got an exception connected to that.

Please assist.

Answer 1

The same container for your own code and NServiceBus should be configured. Below code shows this configuration for StructureMap.

BusConfiguration busConfiguration = new BusConfiguration();

//Configure the container and use the same one for MVC and NServiceBus    
Container container = new Container();

busConfiguration.UseContainer<StructureMapBuilder>(c => c.ExistingContainer(container));

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