asp.net mvc 4 - MVC4 WebAPI reject invalid enum values -

how can make json.net / mvc 4 webapi reject integer values enum has no member? eg:

if have model:

public enum colour { red = 1 };  public class model {   public colour colour { get; set; } }  model post(model model) {    // model.colour 99, 34234234, 0 etc, etc } 

if post { color: 9999 }, end model model.color = 999 , want return bad request status code instead.

one option write validator:

public class validenumvalueattribute : validationattribute {     protected override validationresult isvalid(object value, validationcontext validationcontext)     {         type enumtype = value.gettype();         bool valid = enum.isdefined(enumtype, value);         if (!valid)         {             return new validationresult(string.format("{0} not valid value type {1}", value, enumtype.name));         }         return validationresult.success;     } } 

use as:

public enum color {red = 1, blue = 2}  public class car {     [validenumvalue]     public color color { get; set; } } 

in controller, modelstate.isvalid false.
can throw validationexception, if want fail request, i'm not quite sure how should used.