AjaxDropdown

It can be declared using the AjaxDropdown or AjaxDropdownFor helper like this:

@Html.Awe().AjaxDropdownFor(o => o.Category) 
@Html.Awe().AjaxDropdown("Meal").Parent("Category") 

It needs a controller or url to get data from, by default convention it will look for a controller with the same name as it + "AjaxDropdown", example:

    public class MealAjaxDropdownController : Controller
    {
        public ActionResult GetItems(int? v, int? parent)
        {
            return Json(Db.Meals.Where(o => o.Category.Id == parent)
                            .Select(o => new SelectableItem(o.Id, o.Name, v == o.Id)));// key, text, selected
        }
    }