How to check type parameter?

Question

I have class

class ManagerCar : IBlalba
{
   public void Render(IViewTemplate template)
   {
   }
}

and I know what the parameter template is CarViewTemplate I want check type and throw exception if IViewTemplate != CarViewTemplate

I can do check if(template is typeof(CarViewTemplate)).

But I have many Managers.

I want check this type on compilation and with help attribute like [IsType(typeof(CarViewTemplate))]

Is it possible ?

UPDATE I have interface with Render(IViewTemplate template)

If you can’t use an `IViewTemplate`, don’t accept one. The compile-time check you’re looking for is `CarViewTemplate template`. — Ry-, Jul 31 '13 at 16:13
I am probably missing something important here, but why don't you just make the tempate parameter the CarViewTemplate type? — Fiona - myaccessible.website, Jul 31 '13 at 16:13
As soon as you start doing lots of `typeof` checks, you know that you have a code smell. — Dimitar Dimitrov, Jul 31 '13 at 16:15
If you have an interface with `Render(IViewTemplate template)`, then why isn't `ManagerCar : SuchAnInterface`? — Mathieu Guindon, Jul 31 '13 at 16:22

score 2 · Answer 1 · answered Jul 31 '13 at 16:15

2

This type of check already exists in the compiler, no need to try to help it.

Simply change your method signature to this:

public void RenderCar(CarViewTemplate template)

answered Jul 31 '13 at 16:15

Lasse V. Karlsen

2

I'm actually assuming this answer is unusable, but the main problem here is that this information (that it is unusable) is not in any way or form spelled out in the question. I'm assuming there is a reason the OP cannot just change the code, but since this isn't spelled out, I want to provoke that information to appear. – Lasse V. Karlsen Jul 31 '13 at 16:17

1 Answers1