后台隐藏添加参数然后显示

public class ChanPinController : ApiController
    {
        Dal dal = new Dal();

        //产品表的获取
        [HttpGet]
        [Route("api/ChanPin")]
        public List<ChanPinModel> GetChanPin()
        {

            return dal.GetChanPin();
        }
//-------------------------------------------------------------------
      
        ////获取收藏商品参数

        [HttpGet]
            [Route("api/GetId")]
        public int ADD(int id)
        {

            return dal.ADD(id);

        }
        /// <summary>
        ///显示收藏商品方法
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        ///

        [HttpGet]
        [Route("api/AddShow")]
        public List<ChanPinModel> GetAddShow()
        {
            return dal.GetAddShow();
        }
        //----------------------------------------------

        //获取收藏店铺参数

        //
        [HttpGet]
        [Route("api/ADDdp")]
        public int ADDdp(int id)
        {
            return dal.ADDdp(id);

        }
        //显示我收藏的店铺
        [HttpGet]
        [Route("api/DPshow")]
        public List<ChanPinModel> DPshow()
        {
            return dal.DPshow();
        }

        //显示我收藏的店铺
        [HttpGet]
        [Route("api/SeDianPu")]
        public List<ChanPinModel> SelectDianPu(int id)
        {
            return dal.SelectDianPu(id);
        }
-----------------------------------------------------------------

        //获取产品表
        public List<ChanPinModel> GetChanPin()
        {
           
           
                string sql = "select * from DPtb d join ExamDay e on d.DPid=e.dpwj ";
                return LogHelper.GetShows<ChanPinModel>(sql);
           
          
          
        }
   
//获取收藏商品参数
        public int ADD(int id)
        {
            string sql = $"insert into SPTJTB values({id})";
            return LogHelper.ExecuteNonQuery(sql);

        }
        //显示收藏商品
        public List<ChanPinModel> GetAddShow()
        {
            string sql = "select * from ExamDay join SPTJTB on ExamDay.id=SPTJTB.WJid";
            return LogHelper.GetShows<ChanPinModel>(sql);
        }
        //获取收藏店铺参数
      
        //
        public int ADDdp(int id)
        {
            string sql = $"insert into DPTJTB values({id})";
            return LogHelper.ExecuteNonQuery(sql);

        }
        //显示我收藏的店铺
        public List<ChanPinModel> DPshow()
        {
            string sql = "select * from DPTJTB d join ExamDay e on d.scdpwj=e.dpwj";
            return LogHelper.GetShows<ChanPinModel>(sql);
        }

        //显示我收藏的店铺
        public List<ChanPinModel> SelectDianPu(int id)
        {
            string sql = $"select * from DPtb d join ExamDay e on d.DPid = e.dpwj where d.DPid = {id} ";
            return LogHelper.GetShows<ChanPinModel>(sql);
        }