c#自动获取对应的串口

下面是根据设备VID和PID匹配对应的串口，也可以根据设备的GUID匹配；具体实现返回类似字符串类似“COM1”。

注释部分可以打印出该设备的所有信息，方便查看选择自己需要的进行扩展。

        /// 

        /// VID+PID gets the serial port 
        /// 
        /// 
        private string searchDevicesRegistry()
        {
            string[] available_spectrometers = SerialPort.GetPortNames();
            ManagementObjectCollection.ManagementObjectEnumerator enumerator = null;
            string commData = "";
            ManagementObjectSearcher mObjs = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM WIN32_PnPEntity");
            try
            {
                enumerator = mObjs.Get().GetEnumerator();
                while (enumerator.MoveNext())
                {
                    ManagementObject current = (ManagementObject)enumerator.Current;

                    if (Strings.InStr(Conversions.ToString(current["Caption"]), "(COM", CompareMethod.Binary) <= 0)
                    {
                        continue;
                    }
                    //foreach (var property in current.Properties)
                    //{
                    //    Console.WriteLine(property.Name + ":" + property.Value);
                    //}
                    if (current["DeviceID"].ToString().Equals(@"FTDIBUS\VID_0413+PID_6111+FTZ6XM7RA\0000")))
                    {
                        commData = current["Name"].ToString().Substring(17,4);
                        break;
                    }
                }
            }
            finally
            {
                if (enumerator != null)
                {
                    enumerator.Dispose();
                }
            }
            return commData;
        }

 

‘设备管理器‘里察看USB设备属性的PID和VID，也可以百度科普一下。

这是使用到的动态库using System.IO.Ports;
using System.Management;
using Microsoft.VisualBasic;
using Microsoft.VisualBasic.CompilerServices;