SAP RFID Middleware Connector | SAP B1 & S/4HANA Sync

using System;
using System.Threading.Tasks;
using SAP.Middleware.Connector;

namespace RfidSoftwares.Sap.Connector
{
    public class SapGoodsMovementPoster
    {
        public void PostGoodsReceipt(string purchaseOrder, string[] scannedEpcs)
        {
            RfcDestination destination = RfcDestinationManager.GetDestination("SAP_S4HANA_PROD");
            RfcRepository repo = destination.Repository;
            IRfcFunction bapi = repo.CreateFunction("BAPI_GOODSMVT_CREATE");

            // Populate BAPI Header with GM_Code 01 (Goods Receipt for Purchase Order)
            IRfcStructure header = bapi.GetStructure("GOODSMVT_HEADER");
            header.SetValue("PSTNG_DATE", DateTime.Now.ToString("yyyyMMdd"));
            header.SetValue("DOC_DATE", DateTime.Now.ToString("yyyyMMdd"));

            IRfcStructure code = bapi.GetStructure("GOODSMVT_CODE");
            code.SetValue("GM_CODE", "01");

            // Bulk Item Ingestion from Edge Deduplicated Tag Stream
            IRfcTable items = bapi.GetTable("GOODSMVT_ITEM");
            items.Append();
            items.SetValue("PO_NUMBER", purchaseOrder);
            items.SetValue("MOVE_TYPE", "101");
            items.SetValue("ENTRY_QNT", scannedEpcs.Length);

            bapi.Invoke(destination);
            IRfcStructure returnStruct = bapi.GetStructure("RETURN");
            if (returnStruct.GetString("TYPE") == "E")
                throw new InvalidOperationException(returnStruct.GetString("MESSAGE"));
        }
    }
}