.net获取串口列表

来源：互联网发布：mac智能文件夹怎么用编辑：程序博客网时间：2024/05/20 08:43

//方法一            String[] Str2 = System.IO.Ports.SerialPort.GetPortNames();            if (Str2.Length > 0)            {                for (int k = 0; k < Str2.Length; k++)                {                    comboBoxEdit1.Properties.Items.Add(Str2[k]);                }            }            //方法二            String[] Str2 = Gprs.GetSerialPortNames();            if (Str2.Length > 0)            {                for (int k = 0; k < Str2.Length; k++)                {                    comboBoxEdit1.Properties.Items.Add(Str2[k]);                }            }            //方法三            RegistryKey keyCom = Registry.LocalMachine.OpenSubKey("Hardware\\DeviceMap\\SerialComm");            if (keyCom != null)            {                string[] sSubKeys = keyCom.GetValueNames();                comboBoxEdit1.Properties.Items.Clear();                foreach (string sName in sSubKeys)                {                    string sValue = (string)keyCom.GetValue(sName);                    comboBoxEdit1.Properties.Items.Add(sValue);                }            }

其中方法二的方法不是.net自带的需要自己写：

public string[] GetSerialPortNames()        {            string[] ports = null;            List<string> portsList = new List<string>();            uint HKEY_LOCAL_MACHINE = 0x80000002;            int hKey = -1;            int ret = RegOpenKey(HKEY_LOCAL_MACHINE, @"Hardware\DEVICEMAP\SERIALCOMM", ref hKey);            try            {                if (ret == 0)                {                    int index = 0;                    int BufferSize = 255;                    int ERROR_NO_MORE_ITEMS = 259;                    string valueName = "".PadRight(BufferSize, ' ');                    int valueNameLength = BufferSize;                    int valueLength = BufferSize;                    string value = "".PadRight(BufferSize, ' ');                    while (RegEnumValue(hKey, index, ref valueName, ref valueNameLength, 0, 0, ref value, ref valueLength) != ERROR_NO_MORE_ITEMS)                    {                        if (valueLength > 0)                        {                            if (value[valueLength - 1] == 0)                                valueLength -= 1;                            portsList.Add(value.Substring(0, valueLength));                        }                        index += 1;                        valueName = "".PadRight(BufferSize, ' ');                        valueNameLength = BufferSize;                        valueLength = BufferSize;                    }                }            }            catch (Exception)            {            }            finally            {                if (ret == 0)                    RegCloseKey(hKey);            }            if (portsList.Count == 0)                ports = new string[0];            else                ports = portsList.ToArray();            return ports;        }

这里的三个方法第一个使用的是.net自带的类进行函数调用，第二个是使用win32 的api方法，第三个是读取注册表信息。