[SOLVED] How do you use Castle Validator with Subsonic generated classes?

How do you use Castle Validator with Subsonic generated classes?

Castle Validator uses attributes to specify validation rules. How can you hook these up with Subsonic's generated classes (or any classes where you can't define the attributes on)? Is there a way to programatically specify validation rules without using the attribute method?

Solution

I think the best way to do that is using MetadataType. It's a DataAnnotations that let's your class have like a pair or something like that. I don't know how to explain it better so, let's for the samples:

You first need to add this directive to your code:

using System.ComponentModel.DataAnnotations;

Them you should create the partial class of you generated class with an attribute specifying that this class has an MetadataType:


[MetadataType(typeof(UserMetadata))] 
public partial class User
{
}

Then you create your metadata class with your castle validation:


public class UserMetadata
{
    [ValidateNonEmpty]
    [ValidateLength(6, 24)]
    public string Username { get; set; }

    [ValidateNonEmpty]
    [ValidateLength(6, 100)]
    [ValidateEmail]
    public string Email { get; set; }

    [ValidateNonEmpty]
    [ValidateLength(6, 24)]
    public string Password { get; set; }
}