臨時存入datatable

臨時存入datatble，但不插入資料庫，資料存完一起插入 

 private DataTable shopcar(int GId, string Gname, string Gprice, string Gcount, string Gpic)
        {
            DataTable dt;
            if (Session["shopcar"] == null)
            {
                dt = new DataTable("shopcar");

                DataColumn dc0 = new DataColumn("編號", Type.GetType("System.Int16"));
                DataColumn dc1 = new DataColumn("商品名稱", Type.GetType("System.String"));
                DataColumn dc2 = new DataColumn("本店價", Type.GetType("System.String"));
      
                dt.Columns.Add(dc0);
                dt.Columns.Add(dc1);
                dt.Columns.Add(dc2);
              
            }
            else
            {
                 dt = Session["shopcar"] as DataTable;
            }
          
            DataRow dr = dt.NewRow();
            dr["編號"] = GId;
            dr["商品名稱"] = Gname;
            dr["本店價"] = Gprice;
            dt.Rows.Add(dr);
            Session["shopcar"] = dt;
            return dt;
        }