private void frmPurchaseOrderAdd_Load(object sender, EventArgs e)
        {
            keyValues = SupplierDataAccess.GetSuppliersForOrder();
            if (keyValues != null && cmbSupplier.Items.Count < 1)
            {
                foreach (var item in keyValues)
                {
                    cmbSupplier.Items.Add(item.Value);
                    supplierIds.Add(item.Key);
                }
            }

            if (chkPaid.Checked)
            {
                datePaid.Enabled = true;
            }
            else
            {
                datePaid.Enabled      = false;
                datePaid.Format       = DateTimePickerFormat.Custom;
                datePaid.CustomFormat = " ";
            }
            if (orderId > 0)
            {
                btnAdd.Text = "Update";
            }
            else
            {
                dateOrder.Value = DateTime.Now.Date;
            }
        }
        public frmPurchaseOrderAdd(Form frmPurchaseOrder, int userId, int orderId)
        {
            this.frmPurchaseOrder = frmPurchaseOrder;
            this.userId           = userId;
            this.orderId          = orderId;
            InitializeComponent();

            keyValues = SupplierDataAccess.GetSuppliersForOrder();
            if (keyValues != null && cmbSupplier.Items.Count < 1)
            {
                foreach (var item in keyValues)
                {
                    cmbSupplier.Items.Add(item.Value);
                    supplierIds.Add(item.Key);
                }
            }

            ViewOrderInfo();
        }