C#中获取串口与并口列表

            //获取系统中的串口并加入到下拉框中
            cbCashBoxPort.Items.Clear();
            string[] ports = System.IO.Ports.SerialPort.GetPortNames();
            if (ports != null)
            {
                foreach (string port in ports)
                {
                    cbCashBoxPort.AddItem(port, port);
                }
            }
            //获取系统中的并口并加入到下拉框中
            using (ManagementObjectSearcher seacher = new ManagementObjectSearcher("select * from Win32_ParallelPort"))
            {
                foreach (ManagementObject item in seacher.Get())
                {
                        PropertyData data = item.Properties["Caption"];
                        cbCashBoxPort.AddItem(data.Value.ToString(),data.Value.ToString());
                }
            }