The controller's action is ambiguous between the action of the baseclass with same name.

Question

The current request for action 'Index' on controller type ContactController is ambiguous between the following action methods:

System.Web.Mvc.ActionResult Index() on type RX.Web.Controllers.ContactController
System.Web.Mvc.ActionResult Index() on type RX.Web.Controllers.CustomControllerBase2[[RX.Core.Model.Contact, RXTechJob.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] 

The Contact Controller:

        public virtual new ActionResult Index()
    {
        return base.Index();
    }

The base Controller:

        public virtual ActionResult Index()
    {

        return View("Index", SelectAll());

    }

Why this happen? How to fix it? Thanks!

Answer 1

You are creating a second method called index that MVC does not know how to handle. see here for a discussion on virtual new creating an additional not overriding method.

Instead for your contact controller consider something along the line of:

public override ActionResult Index() {
        return base.Index();
}