//Thêm group
        public void AddGroup(TBL_GROUP model)
        {
            model.ACTIVATE = true;

            context.TBL_GROUPs.Add(model);
            context.SaveChanges();
        }
        public bool Delete(int maNhom)
        {
            TBL_GROUP groupExist = context.TBL_GROUPs.Find(maNhom);

            if (groupExist == null)
            {
                return(false);
            }
            context.TBL_GROUPs.Remove(groupExist);
            context.SaveChanges();
            return(true);
        }
        public ActionResult AddGroup(TBL_GROUP collection)
        {
            try
            {
                // TODO: Add insert logic here

                if (ModelState.IsValid)
                {
                    PNService.AddGroup(collection);

                    return(Json("Thêm thành công"));
                }
                return(Json("Thêm thất bại"));
            }
            catch (Exception ex)
            {
                string er = ex.Message;
                return(Json(er));
            }
        }