How to enable roles in mvc?? my code is given below and i dont know how to create roles and i want to add it to the databse..

[AttributeUsage(AttributeTargets.All)]

    public class UserRightAttribute : ActionFilterAttribute

    {

        public override void OnActionExecuting(ActionExecutingContext filterContext)

        {

            //write your user right logic

            //if user has right to do nothig otherwise redirect to error page.

            string message = "It seems You  are not authorize to view this part of the web site!!!.";

            RouteValueDictionary redirectTargetDictionary = new RouteValueDictionary();

            redirectTargetDictionary.Add("area", "");

            redirectTargetDictionary.Add("action", "SaveData");

            redirectTargetDictionary.Add("controller", "Home");

            redirectTargetDictionary.Add("customMessage", message);

            filterContext.Result = new RedirectToRouteResult(redirectTargetDictionary);

        }

    }