public static List <SerialPortDevice> Enumerate()
{
List <SerialPortDevice> devices = new List <SerialPortDevice>();
Guid[] guids = GetClassGUIDs("Ports");
Guid[] addGuids = new Guid[] { new Guid(0x86e0d1e0, 0x8089, 0x11d0, 0x9c, 0xe4, 0x08, 0x00, 0x3e, 0x30, 0x1f, 0x73) };
//GetClassGUIDs("Modem");
int oldSize = guids.Length;
Array.Resize <Guid>(ref guids, oldSize + addGuids.Length);
addGuids.CopyTo(guids, oldSize);
string port;
string description;
string busDescription;
string deviceId;
string devicePath;
int size;
for (int guidIndex = 0; guidIndex < guids.Length; guidIndex++)
{
Console.WriteLine("l1");
IntPtr hDevInfoSet = NativeMethods.SetupDiGetClassDevs(ref guids[guidIndex], null, IntPtr.Zero, NativeMethods.DiGetClassFlags.DIGCF_PRESENT | NativeMethods.DiGetClassFlags.DIGCF_DEVICEINTERFACE);
if (hDevInfoSet.ToInt64() == NativeMethods.INVALID_HANDLE_VALUE)
{
break;
}
Console.WriteLine("l2");
IntPtr hParentsDevInfoSet = NativeMethods.SetupDiCreateDeviceInfoList(IntPtr.Zero, IntPtr.Zero);
if (hParentsDevInfoSet.ToInt64() == NativeMethods.INVALID_HANDLE_VALUE)
{
break;
}
Console.WriteLine("l3");
NativeMethods.SP_DEVICE_INTERFACE_DATA devInterfaceData = new NativeMethods.SP_DEVICE_INTERFACE_DATA();
devInterfaceData.CbSize = (uint)Marshal.SizeOf(devInterfaceData);
NativeMethods.SP_DEVINFO_DATA devInfoData = new NativeMethods.SP_DEVINFO_DATA();
NativeMethods.SP_DEVINFO_DATA parentDevInfoData = new NativeMethods.SP_DEVINFO_DATA();
devInfoData.CbSize = (uint)Marshal.SizeOf(devInfoData);
parentDevInfoData.CbSize = (uint)Marshal.SizeOf(parentDevInfoData);
Console.WriteLine("l4");
try
{
bool ok = true;
for (uint i = 0; ok; i++)
{
ok = NativeMethods.SetupDiEnumDeviceInfo(hDevInfoSet, i, ref devInfoData);
if (!ok)
{
break;
}
Console.WriteLine("l5");
port = GetPortName(hDevInfoSet, devInfoData);
if (!port.StartsWith("COM"))
{
continue;
}
Console.WriteLine(port);
busDescription = "";
deviceId = "";
devicePath = "";
//get device path:
try
{
Console.WriteLine("l6");
ok = NativeMethods.SetupDiEnumDeviceInterfaces(hDevInfoSet, IntPtr.Zero, ref guids[guidIndex], i, ref devInterfaceData);
if (ok)
{
//call with 0 to get the size:
Console.WriteLine("l7");
uint nRequiredSize;
ok = NativeMethods.SetupDiGetDeviceInterfaceDetail(hDevInfoSet, devInterfaceData, IntPtr.Zero, 0, out nRequiredSize, devInfoData);
Console.WriteLine("l8");
if (ok == false)
{
ok = true;
int error = Marshal.GetLastWin32Error();
// expect that ok is false and that error is ERROR_INSUFFICIENT_BUFFER = 122,
// and nRequiredSize is the required size
if (error != 122)
{
//throw new Win32Exception(error);
Console.WriteLine(error);
//goto skipDevicepath;
}
}
Console.WriteLine("l9");
// build a Device Interface Detail Data structure
IntPtr didd = Marshal.AllocHGlobal((int)nRequiredSize);
try
{
uint nBytes = nRequiredSize;
Marshal.WriteInt32(didd, (IntPtr.Size == 4) ? (4 + Marshal.SystemDefaultCharSize) : 8);
// now we can get some more detailed information
if (NativeMethods.SetupDiGetDeviceInterfaceDetail(hDevInfoSet, devInterfaceData, didd, nBytes, out nRequiredSize, devInfoData))
{
devicePath = Marshal.PtrToStringAuto(new IntPtr(didd.ToInt32() + 4));
}
}
finally
{
Marshal.FreeHGlobal(didd);
}
}
}
catch (Exception ex)
{
Console.WriteLine($"Failed to {ex.Message} enumerate USB serial devices. Error: [{Marshal.GetLastWin32Error()}] HR: [{Marshal.GetHRForLastWin32Error()}]");
}
//skipDevicepath:
Console.WriteLine("l10");
//get other info:
description = GetDescription(hDevInfoSet, devInfoData);
NativeMethods.CM_Get_Device_ID_Size(out size, devInfoData.DevInst);
size++; //account for '\0'
StringBuilder IDBuffer = new StringBuilder(size);
int getDevIdRet = NativeMethods.CM_Get_Device_ID(devInfoData.DevInst, IDBuffer, size);
if (getDevIdRet != (int)NativeMethods.GetDeviceIdResult.CR_SUCCESS)
{
//throw new Win32Exception(Marshal.GetLastWin32Error(), $"Failed to get parent device ID. With error: {getDevIdRet}]");
}
else
{
deviceId = IDBuffer.ToString();
busDescription = GetDeviceBusDescription(hDevInfoSet, devInfoData);
}
if ((busDescription.Length == 0) || (busDescription == description))
{
NativeMethods.CM_Get_Parent(out parentDevInfoData.DevInst, devInfoData.DevInst);
NativeMethods.CM_Get_Device_ID_Size(out size, parentDevInfoData.DevInst);
size++; //account for '\0'
IDBuffer = new StringBuilder(size);
getDevIdRet = NativeMethods.CM_Get_Device_ID(parentDevInfoData.DevInst, IDBuffer, size);
if (getDevIdRet != (int)NativeMethods.GetDeviceIdResult.CR_SUCCESS)
{
//throw new Win32Exception(Marshal.GetLastWin32Error(), $"Failed to get parent device ID. With error: {getDevIdRet}]");
}
else
{
deviceId = IDBuffer.ToString();
bool result = NativeMethods.SetupDiOpenDeviceInfo(hParentsDevInfoSet, deviceId, IntPtr.Zero, 0, ref parentDevInfoData);
if (!result)
{
//throw new Win32Exception(Marshal.GetLastWin32Error(), $"SetupDiOpenDeviceInfo failed Error: [{Marshal.GetLastWin32Error()}] HR: [{Marshal.GetHRForLastWin32Error()}]");
//busDescription = "";
}
else
{
busDescription = GetDeviceBusDescription(hParentsDevInfoSet, parentDevInfoData);
}
}
}
//Dictionary<string, string> id = GetDeviceVidPid(hDevInfoSet, devInfoData);
var device = new SerialPortDevice
{
Port = port,
Description = description,
FriendlyName = GetFriendlyName(hDevInfoSet, devInfoData),
BusReportedDeviceDescription = busDescription,
DeviceID = deviceId,
DevicePath = devicePath
//Vid = id.ContainsKey("VID") ? (int?)int.Parse(id["VID"], System.Globalization.NumberStyles.HexNumber) : null,
//Pid = id.ContainsKey("PID") ? (int?)int.Parse(id["PID"], System.Globalization.NumberStyles.HexNumber) : null,
//Rev = id.ContainsKey("REV") ? (int?)int.Parse(id["REV"], System.Globalization.NumberStyles.HexNumber) : null
};
devices.Add(device);
}
if (!ok &&
Marshal.GetLastWin32Error() != NativeMethods.NO_ERROR &&
Marshal.GetLastWin32Error() != NativeMethods.ERROR_NO_MORE_ITEMS)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), $"Failed to enumerate USB serial devices. Error: [{Marshal.GetLastWin32Error()}] HR: [{Marshal.GetHRForLastWin32Error()}]");
}
}
finally
{
NativeMethods.SetupDiDestroyDeviceInfoList(hParentsDevInfoSet);
NativeMethods.SetupDiDestroyDeviceInfoList(hDevInfoSet);
}
}
return(devices);
}
public static List <SerialPortDevice> Enumerate()
{
List <SerialPortDevice> devices = new List <SerialPortDevice>();
Guid[] guids = GetClassGUIDs("Ports");
Guid[] addGuids = GetClassGUIDs("Modem");
int oldSize = guids.Length;
Array.Resize <Guid>(ref guids, oldSize + addGuids.Length);
addGuids.CopyTo(guids, oldSize);
string port;
string description;
string busDescription;
string deviceId;
for (int guidIndex = 0; guidIndex < guids.Length; guidIndex++)
{
IntPtr hDevInfoSet = NativeMethods.SetupDiGetClassDevs(ref guids[guidIndex], null, IntPtr.Zero, NativeMethods.DiGetClassFlags.DIGCF_PRESENT);
if (hDevInfoSet.ToInt64() == NativeMethods.INVALID_HANDLE_VALUE)
{
break;
}
IntPtr hParentsDevInfoSet = NativeMethods.SetupDiCreateDeviceInfoList(IntPtr.Zero, IntPtr.Zero);
if (hParentsDevInfoSet.ToInt64() == NativeMethods.INVALID_HANDLE_VALUE)
{
break;
}
NativeMethods.SP_DEVINFO_DATA devInfoData = new NativeMethods.SP_DEVINFO_DATA();
NativeMethods.SP_DEVINFO_DATA parentDevInfoData = new NativeMethods.SP_DEVINFO_DATA();
devInfoData.CbSize = (uint)Marshal.SizeOf(devInfoData);
parentDevInfoData.CbSize = (uint)Marshal.SizeOf(parentDevInfoData);
try
{
for (uint i = 0; NativeMethods.SetupDiEnumDeviceInfo(hDevInfoSet, i, ref devInfoData); i++)
{
port = GetPortName(hDevInfoSet, devInfoData);
if (!port.StartsWith("COM"))
{
continue;
}
busDescription = "";
deviceId = "";
description = GetDescription(hDevInfoSet, devInfoData);
NativeMethods.CM_Get_Device_ID_Size(out int size, devInfoData.DevInst);
size++; //account for '\0'
StringBuilder IDBuffer = new StringBuilder(size);
int getDevIdRet = NativeMethods.CM_Get_Device_ID(devInfoData.DevInst, IDBuffer, size);
if (getDevIdRet != (int)NativeMethods.GetDeviceIdResult.CR_SUCCESS)
{
//throw new Win32Exception(Marshal.GetLastWin32Error(), $"Failed to get parent device ID. With error: {getDevIdRet}]");
}
else
{
deviceId = IDBuffer.ToString();
busDescription = GetDeviceBusDescription(hDevInfoSet, devInfoData);
}
if ((busDescription.Length == 0) || (busDescription == description))
{
NativeMethods.CM_Get_Parent(out parentDevInfoData.DevInst, devInfoData.DevInst);
NativeMethods.CM_Get_Device_ID_Size(out size, parentDevInfoData.DevInst);
size++; //account for '\0'
IDBuffer = new StringBuilder(size);
getDevIdRet = NativeMethods.CM_Get_Device_ID(parentDevInfoData.DevInst, IDBuffer, size);
if (getDevIdRet != (int)NativeMethods.GetDeviceIdResult.CR_SUCCESS)
{
//throw new Win32Exception(Marshal.GetLastWin32Error(), $"Failed to get parent device ID. With error: {getDevIdRet}]");
}
else
{
deviceId = IDBuffer.ToString();
bool result = NativeMethods.SetupDiOpenDeviceInfo(hParentsDevInfoSet, deviceId, IntPtr.Zero, 0, ref parentDevInfoData);
if (!result)
{
//throw new Win32Exception(Marshal.GetLastWin32Error(), $"SetupDiOpenDeviceInfo failed Error: [{Marshal.GetLastWin32Error()}] HR: [{Marshal.GetHRForLastWin32Error()}]");
//busDescription = "";
}
else
{
busDescription = GetDeviceBusDescription(hParentsDevInfoSet, parentDevInfoData);
}
}
}
var device = new SerialPortDevice
{
Port = port,
Description = description,
FriendlyName = GetFriendlyName(hDevInfoSet, devInfoData),
BusReportedDeviceDescription = busDescription,
DeviceID = deviceId
};
devices.Add(device);
}
if (Marshal.GetLastWin32Error() != NativeMethods.NO_ERROR &&
Marshal.GetLastWin32Error() != NativeMethods.ERROR_NO_MORE_ITEMS)
{
throw new Win32Exception(Marshal.GetLastWin32Error(), $"Failed to enumerate USB serial devices. Error: [{Marshal.GetLastWin32Error()}] HR: [{Marshal.GetHRForLastWin32Error()}]");
}
}
finally
{
NativeMethods.SetupDiDestroyDeviceInfoList(hParentsDevInfoSet);
NativeMethods.SetupDiDestroyDeviceInfoList(hDevInfoSet);
}
}
return(devices);
}