Long story short, I'm trying to use ELMAH with MVC 2 and Ninject, and I need to use parameterless constructors. I created an initial post about it here: Using a parameterless controller constructor with Ninject?
I was advised to use property injection instead of constructor injection. So I moved from this:
public class DepartmentsController : Controller
{
private IDepartmentsRepository departmentsRepository;
public DepartmentsController(IDepartmentsRepository departmentsRepository)
{
this.departmentsRepository = departmentsRepository;
}
...
}
to this:
public class DepartmentsController : Controller
{
private IDepartmentsRepository _departmentsRepository;
[Inject]
public IDepartmentsRepository DepartmentsRepository
{
get { return _departmentsRepository; }
set { _departmentsRepository = value; }
}
...
}
But in my other controller functions, whether I try to access DepartmentsRepository or _departmentsRepository, I get an object reference not set to an instance of an object error when I try to access it.
Is there something else I need to do here?
I had a similar problem. Have a look at my questions: Using Ninject with Membership.Provider.
Basically when you initialise DepartmentsController
you need to injectthis
(i.e. your departments controller into your Ninject kernal. So its something like:
public class DepartmentsController : Controller
{
private IDepartmentsRepository _departmentsRepository;
[Inject]
public IDepartmentsRepository DepartmentsRepository
{
get { return _departmentsRepository; }
set { _departmentsRepository = value; }
}
public DepartmentsController()
{
NinjectHelper.Kernel.Inject(this);
}
}
Where NinjectHelper in this case gets the current Ninject Kernel.