public ActionResult Edit(int id, area a)
 {
     try
     {
         area area = new area();
         area.are_cod = id;
         area.are_des = a.are_des;
         if (model.ActualizarArea(area).Equals("OK"))
         {
             return(RedirectToAction("Index"));
         }
         else
         {
             return(RedirectToAction("Edit"));
         }
     }
     catch (Exception)
     {
         return(View());
     }
 }