How to load data from a smart panel to a customized grid?

Hi, 

I attempted to add selected values from my smart panel to the grid using below code. But it doesn’t work. I don’t know what I have done wrong in this code. Can someone help me with this?

Thank you in advance.

namespace GRIProformaInvoice.Extension
{
    // Acuminator disable once PX1016 ExtensionDoesNotDeclareIsActiveMethod extension should be constantly active
    public class APProformaEntry_Extension : PXGraphExtension<APProformaEntry>
    {	

        public SelectFrom<POOrder>.View POrdersView;  //view for the smart panel

        public SelectFrom<APProformaItemList>.View APProformaView;  //view for the grid

        public PXAction<APProforma> MyAction;
        [PXUIField(DisplayName = "Add Purchase", MapEnableRights = PXCacheRights.Select, MapViewRights = PXCacheRights.Select)]
        [PXButton(CommitChanges = true)]
        public virtual IEnumerable myAction(PXAdapter adapter)
        {

            POrdersView.AskExt();
            return adapter.Get();



        }

        public PXAction<APProforma> addNewOrder;
        [PXButton(CommitChanges = true, DisplayOnMainToolbar = false)]
        [PXUIField(DisplayName = "", MapEnableRights = PXCacheRights.Select, MapViewRights = PXCacheRights.Select, Visible = false)]


        protected virtual IEnumerable AddNewOrder(PXAdapter adapter)
        {
            APProformaView.AllowInsert = true;
            PXSelectBase<POOrder> orders =
                    new PXSelectReadonly<POOrder,
                    Where<POOrder.orderNbr, Equal<Current<APProformaItemList.ponbr>>>>(Base);



            foreach (POOrder item in orders.Select())
            {

                APProformaItemList newOrder = new APProformaItemList();
                newOrder = APProformaView.Insert(newOrder);
                newOrder.Ponbr = item.OrderNbr;
                newOrder.POLineNbr = 5;
                newOrder.ProFormaQty = 100;
                newOrder.Itemid = 1;
                newOrder.POrderQty = 25;
                APProformaView.Update(newOrder);

            }

            return adapter.Get();



         }
     }
}

for your reference:

APProforma = Parent DAC (customized form)

APProformaItemList = DAC for the grid in the tab
APProformaEntry = screen graph