How to use DataAnnotations ErrorMessageResourceName with custom Resource Solution

Question

I'm building a MVC web application with C#. Since the site will be multilingual, I've implemented my own ResourceManager. This class is responsible for fetching the required resource strings from a database/cache depending on the currents thread culture and works fine so far.

My problem is, I'd like to use the my custom ResourceManager solution to fetch validation error messages when for example using the Required Attribute on a property. Can this be done?

Answer 1

The RequiredAttribute allows to use a custom resource manager:

[Required(
    ErrorMessageResourceType = typeof(CustomResourceManager), 
    ErrorMessageResourceName = "ResourceKey")]
public string Username { get; set; }

---

UPDATE:

Another possibility is to write your custom attribute:

public class CustomRequiredAttribute : RequiredAttribute
{
    public override string FormatErrorMessage(string name)
    {
        return YourCustomResourceManager.GetResource(name);
    }
}