C#枚举所有串口COM C#枚举所有串口COM

在实际项目中，如需都COM进行操作，往往需要枚举当前电脑中可用的所有串口COM。
我们第一想到的就是SerialPort.GetPortNames()方法。但这种方法有个缺陷那就是不能罗列那些通过USB连接虚拟出来的COM口。

public abstract class PortInfoBase { public string PortName { get; set; }public string Description { get; set; }public string DeviceId { get; set; } }

public class ComPortInfo : PortInfoBase { public string Manufacturer { get; set; }public override string ToString() { return string.Format("PortName='{0}', Description='{1}', DeviceId='{2}', Manufacturer='{3}'", PortName, Description, DeviceId, Manufacturer); } }

internal class ComPortInfoBuilder { private readonly ManagementBaseObject _mbo; private readonly ComPortInfo _comPortInfo = new ComPortInfo(); public ComPortInfoBuilder(ManagementBaseObject mbo) { mbo.AssertNotNull("mbo"); _mbo = mbo; }public ComPortInfo Build() { BuildPortName(); BuildDescription(); BuildDeviceId(); BuildManufacturer(); return _comPortInfo; }private void BuildPortName() { const string pattern = @"COM\d+"; _comPortInfo.PortName = Regex.Match((string)_mbo["Caption"], pattern, RegexOptions.RightToLeft).Value; }private void BuildDescription() { _comPortInfo.Description = (string)_mbo["Description"]; }private void BuildDeviceId() { _comPortInfo.DeviceId = (string)_mbo["DeviceID"]; }private void BuildManufacturer() { _comPortInfo.Manufacturer = (string)_mbo["Manufacturer"]; } }

public interface IComPortEnumerator { ComPortInfo[] Enumerate(); }public class ComPortEnumerator : IComPortEnumerator { private readonly ILog _logger = LogManager.GetLogger(typeof(ComPortEnumerator)); public ComPortInfo[] Enumerate() { var comPortInfos = new List(); try { //Because Win32_SerialPort can't find the virtual COM ports, use Win32_PnPEntity here using (var searcher = new ManagementObjectSearcher(@"root\CIMV2", "SELECT * FROM Win32_PnPEntity WHERE Status='OK'")) { foreach (var mbo in searcher.Get()) { var result = Parse(mbo); if (result.Item1) comPortInfos.Add(result.Item2); } } } catch (Exception exception) { _logger.Error(exception); }return comPortInfos.ToArray(); }private Tuple Parse(ManagementBaseObject mbo) { try { if (BelongsToComPort(mbo)) { var comPortInfo = BuildComPortInfo(mbo); return Tuple.Create(true, comPortInfo); } } catch (Exception exception) { _logger.Error(exception); }return Tuple.Create(false, (ComPortInfo)null); }private static bool BelongsToComPort(ManagementBaseObject mbo) { var value = https://www.it610.com/article/mbo["Caption"] as string; if (value =https://www.it610.com/article/= null) return false; const string pattern = @"($COM\d+$)$"; return Regex.IsMatch(value, pattern); }private static ComPortInfo BuildComPortInfo(ManagementBaseObject mbo) { var builder = new ComPortInfoBuilder(mbo); return builder.Build(); } }

【C#枚举所有串口COM】