Error while running MVC Application

Question

I am getting the following error while running my MVC application, which uses the json data:

An error occurred while creating a controller of type 'ecom.Controllers.AdminController'. If the controller doesn't have a controller factory, ensure that it has a parameterless public constructor."

How can I fix this?

As error says may be you don't have parameterless public constructor? — Ilya Khaprov
– Ilya Khaprov, Commented Oct 27, 2009 at 12:02
Or check whether there's code in your constructor throwing an exception: stackoverflow.com/questions/438870/… — Buu
– Buu, Commented Oct 27, 2009 at 12:06

tvanfosson · Accepted Answer · 2009-10-27 12:05:31Z

2

If you've provided a non-default constructor for your controller, one which takes parameters, (say, for testing) you need to also provide suitable default, parameterless constructor that doesn't take parameters so that the default controller factory can instantiate your controller. If your controller must have parameters supplied to it and can't use a default, parameterless constructor, then you must implement a controller factory for it that knows how to instantiate it with the parameters.

answered Oct 27, 2009 at 12:05

tvanfosson

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2 Comments

RichardOD Over a year ago

+1. Absolutely. I would add if you need to inject something into the controllers, then using something like Unity would be useful.

nkirkes Over a year ago

Or Castle.Windsor, Ninject, StructureMap, Autofac, etc. Just throwing out options.

Mark Brittingham · Accepted Answer · 2009-10-27 12:07:58Z

0

By default, the class you derive from "Controller" (e.g. "MyController") doesn't have a constructor. If you add one that adds parameters (for whatever reason) then you'll also need a parameterless version. It has nothing to do with json as far as I know.

answered Oct 27, 2009 at 12:07

Mark Brittingham

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1 Comment

RichardOD Over a year ago

This is true unless you are using IOC.

JL. · Accepted Answer · 2009-10-27 12:06:10Z

0

Try giving it a constructor - public , no parameters

answered Oct 27, 2009 at 12:06

JL.

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