How localize ErrorMessage in DataAnnotation?

Question

Using MVC 5 I need to localize an ErrorMessage for a DataAnnotation attributes. I receive the following error

ERROR

An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type

In model

[Compare("Password", ErrorMessage = Resources.Account_Register_ConfirmPasswordErrorMessage)]
public string ConfirmPassword { get; set; }

Any idea how to fix it?

Answer 1

You need to use ErrorMessageResourceName and ErrorMessageResourceType properties.

For example like this:

[Compare("Password", ErrorMessageResourceName = "ConfirmPasswordErrorMessage",
  ErrorMessageResourceType=typeof(<<type_of_your_resoruce_class>>)]
public string ConfirmPassword { get; set; }

Hope this helps!

Regards, Uros

Answer 2

You don't need anything, just create your resource file in right place.

For example Resources > ViewModels > LoginVm.ka-GE.resx (Georgian culture-info)

in LoginVm:
[Required(ErrorMessage = "UserName is Required")]

and in LoginVm.ka-GE.resx just add

UserName is Required > სახელი არის აუცილებელი < (it's Georgian Language)

and all done.