C#識別特定的串口號

命名空間

using System.IO.Ports;  //Serial
using System.IO;
using System.Runtime.InteropServices;  //Struct
using System.Management;  //ManagementObjectSearchers

需要手動添加服務

        private static string TWE_LITE_ID = "FTDIBUS\\VID_0403+PID_6001";//FTDIBUS\\VID_0403

        public enum HardwareEnum
        {
            //Hardware
            Win32_Processor, // CPU 
            Win32_PhysicalMemory, // Physical memory
            Win32_Keyboard, // Keyboard
            Win32_PointingDevice, // Point the input device, including the mouse.
            Win32_FloppyDrive, // Floppy disk drive
            Win32_DiskDrive, // Hard disk drive
            Win32_CDROMDrive, // CD-ROM drive
            Win32_BaseBoard, // Motherboard
            Win32_BIOS, // BIOS 
            Win32_ParallelPort, // Parallel port
            Win32_SerialPort, // Serial port
            Win32_SerialPortConfiguration, // Serial configuration
            Win32_SoundDevice, // Multimedia equipment, generally refers to the sound card.
            Win32_SystemSlot, // ISA & PCI & AGP
            Win32_USBController, // USB controller
            Win32_NetworkAdapter, // Network adapter
            Win32_NetworkAdapterConfiguration, // Network adapter settings
            Win32_Printer, // Printer
            Win32_PrinterConfiguration, // Printer settings
            Win32_PrintJob, // Printer task
            Win32_TCPIPPrinterPort, // Printer port
            Win32_POTSModem, // MODEM
            Win32_POTSModemToSerialPort, // MODEM port
            Win32_DesktopMonitor, // Monitor
            Win32_DisplayConfiguration, // Video card
            Win32_DisplayControllerConfiguration, // Graphics settings
            Win32_VideoController, // 
            Win32_VideoSettings, // 

            // Operating system
            Win32_TimeZone, // Time zone
            Win32_SystemDriver, // System Driver
            Win32_DiskPartition, // Disk Partition
            Win32_LogicalDisk, // Logical Disk
            Win32_LogicalDiskToPartition, // Logical Disk To Partition
            Win32_LogicalMemoryConfiguration, // Logical Memory Configuration
            Win32_PageFile, // Page File
            Win32_PageFileSetting, // Page File Setting
            Win32_BootConfiguration, // Boot Configuration
            Win32_ComputerSystem, // Computer information 
            Win32_OperatingSystem, // Operating system information
            Win32_StartupCommand, // The system automatically starts the program
            Win32_Service, // System installed services
            Win32_Group, // Group
            Win32_GroupUser, // Group users
            Win32_UserAccount, // Group account
            Win32_Process, // System process
            Win32_Thread, // System thread
            Win32_Share, // Share
            Win32_NetworkClient, // Network Client
            Win32_NetworkProtocol, // Network Protocol
            Win32_PnPEntity,//all device
        }


/// <summary>
        /// Get available ports
        /// </summary>
        private string getAvailablePorts()
        {
            string[] ss = MulGetHardwareInfo(HardwareEnum.Win32_PnPEntity, "Name");    //Get PC hardware information
            System.Collections.ArrayList portArray = new System.Collections.ArrayList();
            try
            {
                for (var i = 0; i < ss.Length; i++)
                {
                    if (ss[i].IndexOf("(") > -1 && ss[i].IndexOf(")") > -1)
                    {
                        portArray.Add(ss[i].Substring(ss[i].IndexOf("(") + 1, ss[i].IndexOf(")") - ss[i].IndexOf("(") - 1));
                    }
                }

                if (portArray.Count <= 0)
                    return "";
                else
                    return portArray[0].ToString();
            }
            catch
            {
                MessageBox.Show("Get serial ports error!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return "";
            }

            //if (portArray.Count > 0)
            //{
            //    //cmbPortName.Items.AddRange(portArray.ToArray());
            //    //cmbPortName.SelectedIndex = 0;
            //    //return portArray[0].ToString ();
            //}
        }

        /// <summary>
        /// Get PC hardware information
        /// </summary>
        /// <param name="hardType"></param>
        /// <param name="propKey"></param>
        /// <returns></returns>
        public static string[] MulGetHardwareInfo(HardwareEnum hardType, string propKey)
        {
            List<string> strs = new List<string>();
            try
            {
                using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("select * from " + hardType))
                {
                    var hardInfos = searcher.Get();
                    foreach (var hardInfo in hardInfos)
                    {
                        if (hardInfo["PNPDeviceID"].ToString().Contains(TWE_LITE_ID))
                        {
                            strs.Add(hardInfo.Properties[propKey].Value.ToString());
                        }
                    }
                    searcher.Dispose();
                }
                return strs.ToArray();
            }
            catch
            {
                return null;
            }
            finally
            { strs = null; }
        }

如果搜索所有的串口號如下：

        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                string[] serialPortNames = SerialPort.GetPortNames();
                foreach (string serialPortName in serialPortNames)
                {
                    Invoke(new Action(() =>
                    {
                        cbxCOMPort.Items.Add(serialPortName);
                    }));
                }
                cbxCOMPort.SelectedIndex = serialPortNames.Length > 0 ? 0 : -1;
            }
            catch { }
        }