I have a class that inherits from the UmbracoApiController class and I cannot get my dependencies injected into it:

public class EnquiriesApiController : UmbracoApiController
{
    private readonly IEnquiryService _enquiryService;

    public EnquiriesApiController(IEnquiryService enquiryService)
    {
        _enquiryService = enquiryService;
    }

    public void Post([FromBody]Enquiry model)
    {
        enquiryService.SubmitEnquiry(model);
    }
}

I am using the standard AutofacWebApiDependencyResolver set up, described here (I am already using AutofacDependencyResolver for my standard controller registration).

If I remove the constructor, the EnquiriesApiController loads fine but obviously the _enquiryService will never be set. When I add it back in, the constructor is never hit, and my action is also never hit either.

I have checked the Umbraco source and I can see that the UmbracoApiController has a constructor that requires an UmbracoContext parameter, so I assume this is why my constructor and action may never get hit.

So, the question is how do I DI into my class? I have tried property injection and this doesn't work either.

Any ideas?