C#读取计算机串口

     方法一：从计算机注册表的特定位置读取出串口信息。

　　  /// <summary>
        /// 从注册表获取系统串口列表
        /// </summary>
        public string[] GetComList()
        {
            RegistryKey keyCom = Registry.LocalMachine.OpenSubKey("Hardware\\DeviceMap\\SerialComm");
            string[] sSubKeys = keyCom.GetValueNames();
            string[] str = new string[sSubKeys.Length];
            for (int i = 0; i < sSubKeys.Length; i++)
            {
                str[i] = (string)keyCom.GetValue(sSubKeys[i]);
            }
            return str;
        }

     方法二：利用.NET下提供的SerialPort类具体如下：

void GetPort()
        {
            Microsoft.Win32.RegistryKey hklm= Microsoft.Win32.Registry.LocalMachine;

            Microsoft.Win32.RegistryKey software11= hklm.OpenSubKey("HARDWARE");

            //打开"HARDWARE"子健
            Microsoft.Win32.RegistryKey software= software11.OpenSubKey("DEVICEMAP");

            Microsoft.Win32.RegistryKey sitekey= software.OpenSubKey("SERIALCOMM");

           //获取当前子健
            String []Str2= sitekey.GetValueNames;

//Str2=System.IO.Ports.SerialPort.GetPortNames()；//第二中方法，直接取得串口值

            //获得当前子健下面所有健组成的字符串数组
             Integer ValueCount= sitekey.ValueCount;
            //获得当前子健存在的健值
            int i;
            for( i=0;i< ValueCount;i++)
            {
                ComboBox1.Items.Add(sitekey.GetValue(Str2[i]));           
            }
        }