Using ASP.Net MVC Data Annotation outside of MVC

Question

i was wondering if there is a way to use ASP.Net\'s Data annotation without the MVC site.

My example is that i have a class that once created needs to be validated,

Answer 1

Here's an example:

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;

public class Foo
{
    [Required(ErrorMessage = "the Bar is absolutely required :-)")]
    public string Bar { get; set; }
}

class Program
{
    public static void Main()
    {
        var foo = new Foo();
        var results = new List<ValidationResult>();
        var context = new ValidationContext(foo, null, null);
        if (!Validator.TryValidateObject(foo, context, results))
        {
            foreach (var error in results)
            {
                Console.WriteLine(error.ErrorMessage);
            }
        }
    }
}

But quite honestly FluentValidation is much more powerful.