public void GroupbuyChangeStore(GroupBuy groupBuy)
 {
     using (var db = new HoGameEISContext())
     {
         var sql = @"exec [dbo].[usp_ChangeGroupBuyStore] @StoreId, @GroupBuyId";
         db.Database.ExecuteSqlCommand(sql,
             new SqlParameter("@StoreId", groupBuy.StoreId),
             new SqlParameter("@GroupBuyId", groupBuy.GroupBuyId));
     }
 }
        public void GroupbuyEndTime(int GroupBuyId, GroupBuy input)
        {
            GroupBuy groupBuy;

            using (var db = new HoGameEISContext())
            {
                groupBuy = db.GroupBuys.Where(o => o.GroupBuyId == GroupBuyId).FirstOrDefault<GroupBuy>();

                if (groupBuy != null)
                {
                    groupBuy.EndTime = input.EndTime;

                    db.Entry(groupBuy).State = System.Data.Entity.EntityState.Modified;

                    db.SaveChanges();
                }

            }
        }