public virtual IEnumerable modifyPO(POOrder pOOrder, POLine pOLine)
        {
            PLNSC.ScreenService.OperationContext screenContext = new PLNSC.ScreenService.OperationContext()
            {
                district     = "SC01",
                position     = "INTPO",
                maxInstances = 1
            };

            ScreenService screenService = new ScreenService()
            {
                Timeout = sessionTimeout,
                Url     = $"{urlPrefix(dbName)}ScreenService"
            };
            ScreenDTO screenReply = new ScreenDTO();
            ScreenSubmitRequestDTO submitRequest = new ScreenSubmitRequestDTO();

            bool   loggedIn      = false;
            bool   modifyFlag    = false;
            string screenName    = "";
            string errMess       = "";
            string currentCursor = "";

            try
            {
                ClientConversation.authenticate(userName, password);
                loggedIn = true;
            }
            catch (Exception ex)
            {
                loggedIn = false;
                throw new PXException(ex.Message);
            }

            if (loggedIn)
            {
                try
                {
                    screenReply = screenService.executeScreen(screenContext, "MSO220");
                    screenName  = screenReply.mapName;
                    if (screenName != "MSM220A")
                    {
                        throw new PXException(CustomMessage.NotMSM220A);
                    }
                    ScreenNameValueDTO[] fields = { new ScreenNameValueDTO(), new ScreenNameValueDTO(), new ScreenNameValueDTO() };

                    fields[0].fieldName = "OPTION1I";
                    fields[0].value     = "1";
                    fields[1].fieldName = "PO_NO1I";
                    fields[1].value     = pOOrder.OrderNbr;
                    fields[2].fieldName = "PO_ITEM_NO1I";
                    fields[2].value     = pOLine.LineNbr.ToString();

                    submitRequest.screenFields = fields;

                    submitRequest.screenKey = "1"; // OK
                    screenReply             = screenService.submit(screenContext, submitRequest);
                    screenName = screenReply.mapName;
                    errMess    = screenReply.message;

                    if (errMess.Trim() != "")
                    {
                        throw new PXException(errMess.Trim());
                    }

                    if (screenName == "MSM22CA")
                    {
                        ScreenFieldDTO[] screenFieldDTOs = screenReply.screenFields;

                        ScreenNameValueDTO[] modifyPOFields = new ScreenNameValueDTO[7];
                        modifyPOFields[0]           = new ScreenNameValueDTO();
                        modifyPOFields[0].fieldName = "GROSS_PR_UOP1I";
                        if (pOLine.LineType == POLineType.GoodsForDropShip || pOLine.LineType == POLineType.GoodsForInventory || pOLine.LineType == POLineType.GoodsForSalesOrder ||
                            pOLine.LineType == POLineType.GoodsForManufacturing || pOLine.LineType == POLineType.GoodsForReplenishment)
                        {
                            modifyPOFields[0].value = Math.Round(pOLine.CuryUnitCost ?? 0, 2).ToString();
                        }
                        else
                        {
                            modifyPOFields[0].value = Math.Round((pOLine.CuryUnitCost ?? 0) * (pOLine.OrderQty ?? 0), 2).ToString();
                        }

                        modifyPOFields[1]           = new ScreenNameValueDTO();
                        modifyPOFields[1].fieldName = "UNIT_OF_ISSUE1I";
                        modifyPOFields[1].value     = pOLine.UOM.Trim();

                        modifyPOFields[2]           = new ScreenNameValueDTO();
                        modifyPOFields[2].fieldName = "CURR_QTY_P1I";
                        if (pOLine.LineType == POLineType.GoodsForDropShip || pOLine.LineType == POLineType.GoodsForInventory || pOLine.LineType == POLineType.GoodsForSalesOrder ||
                            pOLine.LineType == POLineType.GoodsForManufacturing || pOLine.LineType == POLineType.GoodsForReplenishment)
                        {
                            modifyPOFields[2].value = Math.Round(pOLine.OrderQty ?? 0, 2).ToString();
                        }
                        else
                        {
                            modifyPOFields[2].value = string.Empty;
                        }

                        modifyPOFields[3]           = new ScreenNameValueDTO();
                        modifyPOFields[3].fieldName = "UNIT_OF_PURCH1I";
                        modifyPOFields[3].value     = pOLine.UOM.Trim();

                        modifyPOFields[4]           = new ScreenNameValueDTO();
                        modifyPOFields[4].fieldName = "PRICE_CODE1I";
                        modifyPOFields[4].value     = pOOrder.TermsID.Trim();

                        modifyPOFields[5]           = new ScreenNameValueDTO();
                        modifyPOFields[5].fieldName = "DUE_DATE1I";
                        modifyPOFields[5].value     = (pOLine.PromisedDate ?? DateTime.Now).ToString("yyyyMMdd");

                        modifyPOFields[6]           = new ScreenNameValueDTO();
                        modifyPOFields[6].fieldName = "DUE_SITE1I";
                        modifyPOFields[6].value     = (pOLine.PromisedDate ?? DateTime.Now).ToString("yyyyMMdd");

                        submitRequest.screenFields = modifyPOFields;

                        submitRequest.screenKey = "1"; // OK
                        screenReply             = screenService.submit(screenContext, submitRequest);
                        screenName    = screenReply.mapName;
                        errMess       = screenReply.message;
                        currentCursor = screenReply.currentCursorFieldName;

                        if (screenReply.functionKeys.Contains("XMIT-Confirm"))
                        {
                            submitRequest.screenKey = "1"; // OK
                            screenReply             = screenService.submit(screenContext, submitRequest);
                        }

                        screenName    = screenReply.mapName;
                        errMess       = screenReply.message;
                        currentCursor = screenReply.currentCursorFieldName;

                        if (errMess.Trim() != "" && !screenReply.functionKeys.Contains("XMIT-Confirm"))
                        {
                            throw new PXException(errMess.Trim());
                        }
                    }
                    screenService.positionToMenu(screenContext);
                }
                catch (Exception e)
                {
                    screenService.positionToMenu(screenContext);
                    throw new PXException(e.Message);
                }
            }

            return(null);
        }
        public virtual IEnumerable maintainCustomer(PXCache cache, Customer customer)
        {
            string screenName = "";
            string errMess    = "";
            string customerAcctCD;

            if (customer.AcctCD == null)
            {
                return(null);
            }
            else
            {
                customerAcctCD = customer.AcctCD.Trim();
            }

            ScreenDTO screenReply = new ScreenDTO();
            ScreenSubmitRequestDTO submitRequest = new ScreenSubmitRequestDTO();

            try
            {
                ClientConversation.authenticate(userName, password);
                ScreenService screenService = new ScreenService()
                {
                    Timeout = sessionTimeout,
                    Url     = $"{urlPrefix(dbName)}ScreenService"
                };
                PLNSC.ScreenService.OperationContext screenContext = new PLNSC.ScreenService.OperationContext()
                {
                    district       = districtCode,
                    position       = positionID,
                    maxInstances   = 1,
                    returnWarnings = false,
                    trace          = false
                                     //transaction = transID
                };

                string currencyType = customer.CuryID != null?customer.CuryID.Trim() : "IDR";

                screenReply = screenService.executeScreen(screenContext, "MSO500");
                screenName  = screenReply.mapName;

                if (screenName != "MSM500A")
                {
                    screenService.positionToMenu(screenContext);
                    screenReply = screenService.executeScreen(screenContext, "MSO500");
                    screenName  = screenReply.mapName;
                    if (screenName != "MSM500A")
                    {
                        throw new PXException(CustomMessage.NotMSM500A);
                    }
                }

                ScreenNameValueDTO[] fields = { new ScreenNameValueDTO(), new ScreenNameValueDTO() };

                fields[0].fieldName = "OPTION1I";
                fields[0].value     = "1";
                fields[1].fieldName = "CUST_NO1I";
                fields[1].value     = customerAcctCD;

                submitRequest.screenFields = fields;

                submitRequest.screenKey = "1"; // OK
                screenReply             = screenService.submit(screenContext, submitRequest);

                screenName = screenReply.mapName;
                errMess    = screenReply.message;

                if (errMess.Trim() != "" && !errMess.Contains("CUSTOMER CODE ALREADY EXISTS"))
                {
                    throw new PXException(errMess.Trim());
                }
                else
                {
                    if (errMess.Contains("CUSTOMER CODE ALREADY EXISTS"))
                    {
                        ScreenNameValueDTO[] fieldsMod = { new ScreenNameValueDTO(), new ScreenNameValueDTO() };

                        fieldsMod[0].fieldName = "OPTION1I";
                        fieldsMod[0].value     = "2";
                        fieldsMod[1].fieldName = "CUST_NO1I";
                        fieldsMod[1].value     = customerAcctCD;

                        submitRequest.screenFields = fieldsMod;

                        submitRequest.screenKey = "1"; // OK
                        screenReply             = screenService.submit(screenContext, submitRequest);

                        screenName = screenReply.mapName;
                        errMess    = screenReply.message;

                        if (errMess.Trim() != "" && !errMess.Contains("CUSTOMER CODE ALREADY EXISTS"))
                        {
                            throw new PXException(errMess.Trim());
                        }
                    }

                    if (screenName == "MSM500B")
                    {
                        BAccount acctCustomer = PXSelect <BAccount,
                                                          Where <BAccount.bAccountID,
                                                                 Equal <Required <BAccount.bAccountID> > > > .Select(Base, customer.BAccountID);

                        Address customerAddress = PXSelect <Address,
                                                            Where <Address.bAccountID, Equal <Required <Address.bAccountID> > > > .Select(Base, customer.BAccountID);

                        Contact contact = PXSelect <Contact,
                                                    Where <Contact.bAccountID, Equal <Required <Contact.bAccountID> > > > .Select(Base, customer.BAccountID);

                        String customerCountry = "";
                        String addressLine1    = "";
                        String addressLine2    = "";

                        String attn  = "";
                        String email = "";
                        String phone = "";

                        if (customerAddress != null)
                        {
                            customerCountry = customerAddress.CountryID.Trim();
                            addressLine1    = customerAddress.AddressLine1.Trim();
                            addressLine2    = customerAddress.AddressLine2 != null?customerAddress.AddressLine2.Trim() : " ";
                        }

                        if (contact != null)
                        {
                            attn = contact.Salutation != null?contact.Salutation.Trim() : " ";

                            email = contact.EMail != null?contact.EMail.Trim() : " ";

                            phone = contact.Phone1 != null?contact.Phone1.Trim() : " ";
                        }

                        if (screenName == "MSM500B")
                        {
                            ScreenNameValueDTO[] fields500B = { new ScreenNameValueDTO(),
                                                                new ScreenNameValueDTO(),
                                                                new ScreenNameValueDTO(),
                                                                new ScreenNameValueDTO(),
                                                                new ScreenNameValueDTO(),
                                                                new ScreenNameValueDTO(),
                                                                new ScreenNameValueDTO() };

                            string customerAcctName = customer.AcctName != null?customer.AcctName.Trim() : " ";

                            fields500B[0].fieldName = "CUST_NAME2I";
                            fields500B[0].value     = customerAcctName;
                            fields500B[1].fieldName = "CURRENCY_TYPE2I";
                            fields500B[1].value     = currencyType;
                            fields500B[2].fieldName = "COUNTRY_CODE2I";
                            fields500B[2].value     = customerCountry;
                            fields500B[3].fieldName = "INV_ADDR_12I";
                            fields500B[3].value     = addressLine1;
                            fields500B[4].fieldName = "INV_ADDR_22I";
                            fields500B[4].value     = addressLine2;
                            fields500B[5].fieldName = "INV_CONTACT2I";
                            fields500B[5].value     = attn;
                            fields500B[6].fieldName = "INV_PHONE2I";
                            fields500B[6].value     = phone;

                            submitRequest.screenFields = fields500B;

                            submitRequest.screenKey = "1"; // OK
                            screenReply             = screenService.submit(screenContext, submitRequest);

                            screenName = screenReply.mapName.Trim();
                            errMess    = screenReply.message;

                            if (errMess.Trim() != "" && !errMess.Contains("WARNING: CHECK PRICING CODE CURRENCY IN DISTRICTS"))
                            {
                                throw new PXException(errMess.Trim());
                            }
                            else
                            {
                                if (errMess.Contains("WARNING: CHECK PRICING CODE CURRENCY IN DISTRICTS"))
                                {
                                    submitRequest.screenKey = "1"; // OK
                                    screenReply             = screenService.submit(screenContext, submitRequest);
                                    screenName = screenReply.mapName.Trim();
                                    errMess    = screenReply.message;
                                }
                            }

                            if (screenName == "MSM500D")
                            {
                                ScreenNameValueDTO[] fields500D = { new ScreenNameValueDTO() };
                                fields500D[0].fieldName = "EMAIL_ADDRESS4I1";
                                fields500D[0].value     = email;

                                submitRequest.screenFields = fields500D;

                                submitRequest.screenKey = "1"; // OK
                                screenReply             = screenService.submit(screenContext, submitRequest);

                                screenName = screenReply.mapName.Trim();
                                errMess    = screenReply.message;

                                if (errMess.Trim() != "")
                                {
                                    throw new PXException(errMess.Trim());
                                }

                                if (screenReply.functionKeys.Contains("XMIT-Confirm"))
                                {
                                    submitRequest.screenKey = "1"; // OK
                                    screenReply             = screenService.submit(screenContext, submitRequest);
                                }

                                screenName = screenReply.mapName.Trim();
                                errMess    = screenReply.message;

                                if (errMess.Trim() != "")
                                {
                                    throw new PXException(errMess.Trim());
                                }

                                if (screenName == "MSM500C")
                                {
                                    ScreenNameValueDTO[] fields500C = new ScreenNameValueDTO[9];

                                    fields500C[0] = new ScreenNameValueDTO()
                                    {
                                        fieldName = "PMT_METH_IND3I",
                                        value     = "C"
                                    };

                                    fields500C[1] = new ScreenNameValueDTO()
                                    {
                                        fieldName = "CR_TERMS3I",
                                        value     = "U"
                                    };

                                    fields500C[2] = new ScreenNameValueDTO()
                                    {
                                        fieldName = "SECURED3I",
                                        value     = "N"
                                    };

                                    fields500C[3] = new ScreenNameValueDTO()
                                    {
                                        fieldName = "STMT_REQ_SW3I",
                                        value     = "Y"
                                    };

                                    fields500C[4] = new ScreenNameValueDTO()
                                    {
                                        fieldName = "INV_MEDIUM_IND3I",
                                        value     = "P"
                                    };

                                    fields500C[5] = new ScreenNameValueDTO()
                                    {
                                        fieldName = "DAYS_GRACE3I",
                                        value     = "5"
                                    };

                                    fields500C[6] = new ScreenNameValueDTO()
                                    {
                                        fieldName = "DAYS_TO_PAY3I",
                                        value     = "30"
                                    };

                                    string customerClass = customer.CustomerClassID;
                                    string acctGrpCode   = "";

                                    if (customerClass != null)
                                    {
                                        customerClass = customerClass.Trim();
                                        switch (customerClass)
                                        {
                                        case "PLN":
                                            acctGrpCode = "0001";
                                            break;

                                        case "IP":
                                            acctGrpCode = "0002";
                                            break;

                                        case "PJB":
                                            acctGrpCode = "0003";
                                            break;

                                        case "OTHERS":
                                            acctGrpCode = "0000";
                                            break;

                                        default:
                                            acctGrpCode = "0000";
                                            break;
                                        }
                                    }

                                    fields500C[7] = new ScreenNameValueDTO()
                                    {
                                        fieldName = "ACCT_GRP_CODE3I",
                                        value     = acctGrpCode
                                    };

                                    fields500C[8] = new ScreenNameValueDTO()
                                    {
                                        fieldName = "STATEMENT_TYPE3I",
                                        value     = "B"
                                    };

                                    submitRequest.screenFields = fields500C;

                                    submitRequest.screenKey = "1"; // OK
                                    screenReply             = screenService.submit(screenContext, submitRequest);

                                    screenName = screenReply.mapName.Trim();
                                    errMess    = screenReply.message;

                                    if (errMess.Trim() != "" && !errMess.Contains("ACCT GROUP CODE ONLY UPDATED IF VALID FOR DISTRICT"))
                                    {
                                        throw new PXException(errMess.Trim());
                                    }

                                    if (screenReply.functionKeys.Contains("XMIT-Confirm"))
                                    {
                                        submitRequest.screenKey = "1"; // OK
                                        screenReply             = screenService.submit(screenContext, submitRequest);
                                        screenName = screenReply.mapName.Trim();
                                        errMess    = screenReply.message;

                                        if (errMess.Trim() != "")
                                        {
                                            throw new PXException(errMess.Trim());
                                        }
                                        else
                                        {
                                            screenService.positionToMenu(screenContext);
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            } catch (Exception ex)
            {
                throw new PXException(ex.Message);
            }
            return(null);
        }
        public virtual IEnumerable createPO(POOrder pOOrder, POLine pOLine)
        {
            RQRequisitionOrder rQRequisitionOrder = PXSelect <RQRequisitionOrder,
                                                              Where <RQRequisitionOrder.orderNbr, Equal <Required <RQRequisitionOrder.orderNbr> >,
                                                                     And <RQRequisitionOrder.orderCategory, Equal <RQOrderCategory.po> > > > .Select(Base, pOOrder.OrderNbr);

            RQRequisition rQRequisition = PXSelect <RQRequisition, Where <RQRequisition.reqNbr, Equal <Required <RQRequisitionOrder.reqNbr> > > > .Select(Base, rQRequisitionOrder.ReqNbr);

            RQRequisitionExt rQRequisitionExt = rQRequisition.GetExtension <RQRequisitionExt>();

            int    purchaseMethod = rQRequisition != null ? rQRequisitionExt.UsrPurchMethod ?? 2 : 2;
            string nonCoreDO      = rQRequisition != null ? rQRequisitionExt.UsrDONbr != null?rQRequisitionExt.UsrDONbr.Trim() : string.Empty : string.Empty;

            string modifyPRResult = string.Empty;

            if (purchaseMethod != 2)
            {
                modifyPRResult = modifyPOCostAlloc(pOOrder, pOLine, purchaseMethod, nonCoreDO);
                if (!modifyPRResult.Trim().Contains("OK"))
                {
                    return(modifyPRResult.Trim());
                }
            }

            PLNSC.ScreenService.OperationContext screenContext = new PLNSC.ScreenService.OperationContext()
            {
                district     = "SC01",
                position     = "INTPO",
                maxInstances = 1
            };

            ScreenService screenService = new ScreenService()
            {
                Timeout = sessionTimeout,
                Url     = $"{urlPrefix(dbName)}ScreenService"
            };
            ScreenDTO screenReply = new ScreenDTO();
            ScreenSubmitRequestDTO submitRequest = new ScreenSubmitRequestDTO();

            bool   loggedIn      = false;
            bool   modifyFlag    = false;
            string screenName    = "";
            string errMess       = "";
            string currentCursor = "";

            try
            {
                ClientConversation.authenticate(userName, password);
                loggedIn = true;
            }
            catch (Exception ex)
            {
                loggedIn = false;
                throw new PXException(ex.Message);
            }

            if (loggedIn)
            {
                try
                {
                    screenReply = screenService.executeScreen(screenContext, "MSO230");
                    screenName  = screenReply.mapName;
                    if (screenName != "MSM230A")
                    {
                        throw new PXException(CustomMessage.NotMSO230);
                    }
                    ScreenNameValueDTO[] fields = { new ScreenNameValueDTO(), new ScreenNameValueDTO(), new ScreenNameValueDTO() };

                    fields[0].fieldName = "OPTION1I";
                    fields[0].value     = "3";
                    fields[1].fieldName = "PREQ_NO1I";
                    fields[1].value     = pOLine.RQReqNbr;
                    fields[2].fieldName = "PREQ_ITEM_NO1I";
                    fields[2].value     = pOLine.RQReqLineNbr.ToString();

                    submitRequest.screenFields = fields;

                    submitRequest.screenKey = "1"; // OK
                    screenReply             = screenService.submit(screenContext, submitRequest);
                    screenName = screenReply.mapName;
                    errMess    = screenReply.message;

                    if (errMess.Trim() != "")
                    {
                        throw new PXException(errMess.Trim());
                    }

                    if (screenName == "MSM23EA")
                    {
                        ScreenFieldDTO[] screenFieldDTOs = screenReply.screenFields;
                        foreach (ScreenFieldDTO screenFieldDTO in screenFieldDTOs)
                        {
                            String fieldName  = screenFieldDTO.fieldName;
                            String preqItemNo = "";
                            if (fieldName == "PREQ_ITEM_NO1I")
                            {
                                preqItemNo = screenFieldDTO.value;
                            }
                        }

                        ScreenNameValueDTO[] field23E = new ScreenNameValueDTO[5];
                        field23E[0]           = new ScreenNameValueDTO();
                        field23E[0].fieldName = "PO_NO1I";
                        field23E[0].value     = pOOrder.OrderNbr.Trim();

                        field23E[1]           = new ScreenNameValueDTO();
                        field23E[1].fieldName = "PO_ITEM1I";
                        field23E[1].value     = pOLine.LineNbr.ToString();

                        field23E[2]           = new ScreenNameValueDTO();
                        field23E[2].fieldName = "PROCESS_ITEM1I";
                        field23E[2].value     = "L";

                        field23E[3]           = new ScreenNameValueDTO();
                        field23E[3].fieldName = "ORDER_DATE1I";
                        field23E[3].value     = DateTime.Now.ToString("yyyyMMdd");

                        field23E[4]           = new ScreenNameValueDTO();
                        field23E[4].fieldName = "PURCH_OFFICER1I";
                        field23E[4].value     = "ADMIN";

                        submitRequest.screenFields = field23E;

                        submitRequest.screenKey = "1"; // OK
                        screenReply             = screenService.submit(screenContext, submitRequest);

                        if (screenReply.functionKeys.Contains("XMIT-Confirm"))
                        {
                            submitRequest.screenKey = "1"; // OK
                            screenReply             = screenService.submit(screenContext, submitRequest);
                        }

                        screenName    = screenReply.mapName;
                        errMess       = screenReply.message;
                        currentCursor = screenReply.currentCursorFieldName;

                        if (errMess.Trim() != "" && !screenReply.functionKeys.Contains("XMIT-Confirm"))
                        {
                            throw new PXException(errMess.Trim());
                        }
                    }
                }
                catch (Exception e)
                {
                    throw new PXException(e.Message);
                }
            }

            return(null);
        }