ASP.NET MVC How to convert ModelState errors to json

Question

How do you get a list of all ModelState error messages? I found this code to get all the keys: ( Returning a list of keys with ModelState errors)

var errorK         


        

Answer 1

ToDictionary is an Enumerable extension found in System.Linq packaged in the System.Web.Extensions dll http://msdn.microsoft.com/en-us/library/system.linq.enumerable.todictionary.aspx. Here's what the complete class looks like for me.

using System.Collections;
using System.Web.Mvc;
using System.Linq;

namespace MyNamespace
{
    public static class ModelStateExtensions
    {
        public static IEnumerable Errors(this ModelStateDictionary modelState)
        {
            if (!modelState.IsValid)
            {
                return modelState.ToDictionary(kvp => kvp.Key,
                    kvp => kvp.Value.Errors.Select(e => e.ErrorMessage).ToArray()).Where(m => m.Value.Count() > 0);
            }
            return null;
        }

    }

}