获取蓝牙comport名称

我已经发布了一个要点https://gist.github.com/peterfoot/b4f61c81023a1e181b9f3940bca344ba与代码来枚举蓝牙虚拟COM端口。 服务记录中的端口名称值存储在注册表中，因此可以根据设置API的设备路径获取它。 它在代码中显示为RemoteServiceName。 例如，在我的Zebra打印机上，它返回“串行打印机”。 我没有一个设备来处理多个暴露的服务，但这会给你上面显示的设备名旁边的字符串，例如“GNSS服务器”，“COM1”等

码：

 using System; using System.Collections.Generic; using System.Diagnostics; using System.Runtime.InteropServices; using System.Text; namespace BluetoothDiagnostics { public sealed class BluetoothComPort { /// <summary> /// Returns a collection of all the Bluetooth virtual-COM ports on the system. /// </summary> /// <returns></returns> public static IReadOnlyList<BluetoothComPort> FindAll() { List<BluetoothComPort> ports = new List<BluetoothComPort>(); IntPtr handle = NativeMethods.SetupDiGetClassDevs(ref NativeMethods.GUID_DEVCLASS_PORTS, null, IntPtr.Zero, NativeMethods.DIGCF.PRESENT); if (handle != IntPtr.Zero) { try { NativeMethods.SP_DEVINFO_DATA dat = new NativeMethods.SP_DEVINFO_DATA(); dat.cbSize = Marshal.SizeOf(dat); uint i = 0; while (NativeMethods.SetupDiEnumDeviceInfo(handle, i++, ref dat)) { string remoteServiceName = string.Empty; StringBuilder sbid = new StringBuilder(256); int size; NativeMethods.SetupDiGetDeviceInstanceId(handle, ref dat, sbid, sbid.Capacity, out size); Debug.WriteLine(sbid); long addr = GetBluetoothAddressFromDevicePath(sbid.ToString()); // only valid if an outgoing Bluetooth port if (addr != long.MinValue && addr != 0) { IntPtr hkey = NativeMethods.SetupDiOpenDevRegKey(handle, ref dat, NativeMethods.DICS.GLOBAL, 0, NativeMethods.DIREG.DEV, 1); var key = Microsoft.Win32.RegistryKey.FromHandle(new Microsoft.Win32.SafeHandles.SafeRegistryHandle(hkey, true)); object name = key.GetValue("PortName"); var pkey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SYSTEM\\CurrentControlSet\\Services\\BTHPORT\\Parameters\\Devices\\" + addr.ToString("x12")); if (pkey != null) { foreach (string nm in pkey.GetSubKeyNames()) { if (nm.StartsWith("ServicesFor")) { var skey = pkey.OpenSubKey(nm); string s = sbid.ToString(); //bluetooth service uuid from device id string int ifirst = s.IndexOf("{"); string uuid = s.Substring(ifirst, s.IndexOf("}") - ifirst+1); var ukey = skey.OpenSubKey(uuid); // instance id from device id string string iid = s.Substring(s.LastIndexOf("_")+1); var instKey = ukey.OpenSubKey(iid); // registry key contains service name as a byte array object o = instKey.GetValue("PriLangServiceName"); if(o != null) { byte[] chars = o as byte[]; remoteServiceName = Encoding.UTF8.GetString(chars).Trim(); } } } } ports.Add(new BluetoothComPort(sbid.ToString(), addr, name.ToString(), remoteServiceName)); key.Dispose(); } } } finally { NativeMethods.SetupDiDestroyDeviceInfoList(handle); } } return ports; } private string _deviceId; private long _bluetoothAddress; private string _portName; private string _remoteServiceName; internal BluetoothComPort(string deviceId, long bluetoothAddress, string portName, string remoteServiceName) { _deviceId = deviceId; _bluetoothAddress = bluetoothAddress; _portName = portName; _remoteServiceName = remoteServiceName; } public string DeviceId { get { return _deviceId; } } public long BluetoothAddress { get { return _bluetoothAddress; } } public string PortName { get { return _portName; } } public string RemoteServiceName { get { return _remoteServiceName; } } private static long GetBluetoothAddressFromDevicePath(string path) { if (path.StartsWith("BTHENUM")) { int start = path.LastIndexOf('&'); int end = path.LastIndexOf('_'); string addressString = path.Substring(start + 1, (end - start) - 1); // may return zero if it is an incoming port (we're not interested in these) return long.Parse(addressString, System.Globalization.NumberStyles.HexNumber); } // not a bluetooth port return long.MinValue; } private static class NativeMethods { // The SetupDiGetClassDevs function returns a handle to a device information set that contains requested device information elements for a local machine. [DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Auto)] internal static extern IntPtr SetupDiGetClassDevs( ref Guid classGuid, [MarshalAs(UnmanagedType.LPTStr)] string enumerator, IntPtr hwndParent, DIGCF flags); // The SetupDiEnumDeviceInfo function returns a SP_DEVINFO_DATA structure that specifies a device information element in a device information set. [DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Auto)] [return: MarshalAs(UnmanagedType.Bool)] internal static extern bool SetupDiEnumDeviceInfo( IntPtr deviceInfoSet, uint memberIndex, ref SP_DEVINFO_DATA deviceInfoData); // The SetupDiDestroyDeviceInfoList function deletes a device information set and frees all associated memory. [DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Auto)] [return: MarshalAs(UnmanagedType.Bool)] internal static extern bool SetupDiDestroyDeviceInfoList(IntPtr deviceInfoSet); // The SetupDiGetDeviceInstanceId function retrieves the device instance ID that is associated with a device information element. [DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Auto)] [return: MarshalAs(UnmanagedType.Bool)] internal static extern bool SetupDiGetDeviceInstanceId( IntPtr deviceInfoSet, ref SP_DEVINFO_DATA deviceInfoData, System.Text.StringBuilder deviceInstanceId, int deviceInstanceIdSize, out int requiredSize); //static Guid GUID_DEVCLASS_BLUETOOTH = new Guid("{E0CBF06C-CD8B-4647-BB8A-263B43F0F974}"); internal static Guid GUID_DEVCLASS_PORTS = new Guid("{4d36e978-e325-11ce-bfc1-08002be10318}"); [DllImport("setupapi.dll", SetLastError = true)] internal static extern IntPtr SetupDiOpenDevRegKey(IntPtr DeviceInfoSet, ref SP_DEVINFO_DATA DeviceInfoData, DICS Scope, int HwProfile, DIREG KeyType, int samDesired); [Flags] internal enum DICS { GLOBAL = 0x00000001, // make change in all hardware profiles CONFIGSPECIFIC = 0x00000002, // make change in specified profile only } internal enum DIREG { DEV = 0x00000001, // Open/Create/Delete device key DRV = 0x00000002, // Open/Create/Delete driver key } // changes to follow. // SETUPAPI.H [Flags()] internal enum DIGCF { PRESENT = 0x00000002, // Return only devices that are currently present in a system. ALLCLASSES = 0x00000004, // Return a list of installed devices for all device setup classes or all device interface classes. PROFILE = 0x00000008, // Return only devices that are a part of the current hardware profile. } [StructLayout(LayoutKind.Sequential)] internal struct SP_DEVINFO_DATA { internal int cbSize; // = (uint)Marshal.SizeOf(typeof(SP_DEVINFO_DATA)); internal Guid ClassGuid; internal uint DevInst; internal IntPtr Reserved; } } } }