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

[CreditCard(ErrorMessageResourceType = typeof(Messages), ErrorMessageResourceName = "CardNumberInvalid", ErrorMessage = null)]

Adding the ErrorMessage = null will fix your problem.