Either ErrorMessageString or ErrorMessageResourceName must be set, but not both error using CreditCardAttribute

Question

This is my model:

namespace MvcApplication2.Models
{
    public class CreditCard
    {
        [CreditCard(ErrorMessageResourceType = typeof(Messages), Error         


        

Answer 1

I had this same problem on a property that I was localizing. I had defined the ErrorMessageResourceType and then the ErrorMessageResourceName but by mistake put the ErrorMessage atrtribute on as well which threw the exception

[NotEqualTo("User_Name", ErrorMessageResourceType = typeof(LROResources.Global), ErrorMessageResourceName = "UserPasswordCannotBeUsername", ErrorMessage = "The password cannot be the same as your Username.")]

So in my case by just removing ErrorMessage I fixed the problem.