Logic for unmapped field in Entity to get the data while DMF export using PostLoad method

  [DataEventHandler(tableStr(EcoResReleasedProductV2Entity), DataEventType::PostedLoad)]

    public static void EcoResReleasedProductV2Entity_onPostedLoad(Common _sender, DataEventArgs _eventArgs)

    {

        InventItemInventSetup           inventItemInventSetup;

        EcoResReleasedProductV2Entity   ecoResReleasedProductV2Entity  = _sender as EcoResReleasedProductV2Entity;

        select firstonly  MultipleQty from inventItemInventSetup 

            where inventItemInventSetup.ItemId == ecoResReleasedProductV2Entity.ItemNumber;

        if(inventItemInventSetup)

        {

            ecoResReleasedProductV2Entity.SalesQuantityMultiple = inventItemInventSetup.MultipleQty;

        }

    }