Given the following classes:
using System.ComponentModel.DataAnnotations;
public class Book{
public Contact PrimaryContact{get; set;}
public Contact SecondaryContact{get; set;}
[Required(ErrorMessage="Book name is required")]
public string Name{get; set;}
}
public class Contact{
[Required(ErrorMessage="Name is required")]
public string Name{get; set;}
}
Is there a clean way I can give a distinct error message for each instance of Contact
in Book
using DataAnnotations
? For example, if the name was missing from the PrimaryContact
instance the error would read "primary contact name is required".
My current solution is to create a validation service that checks the model state for field errors, then remove said errors and add them back using the specific language I'd like.
This is the only way I know of that, but it's far from clean. It involves using subclassing and MetaData classes to "override" the error message.
public class Book
{
public PrimaryContact PrimaryContact { get; set; }
public SecondaryContact SecondaryContact { get; set; }
[Required(ErrorMessage = "Book name is required")]
public string Name { get; set; }
}
public class Contact
{
[Required(ErrorMessage = "Name is required")]
public string Name { get; set; }
}
[MetadataType(typeof(PrimaryContactMD))]
public class PrimaryContact : Contact
{
class PrimaryContactMD
{
[Required(ErrorMessage = "Primary Contact Name is required")]
public string Name { get; set; }
}
}
[MetadataType(typeof(SecondaryContactMD))]
public class SecondaryContact : Contact
{
class SecondaryContactMD
{
[Required(ErrorMessage = "Secondary Contact Name is required")]
public string Name { get; set; }
}
}