How can I get VID / PID from USB flash drives in C #?

Question

I need to check on all drives and see if any of the VID / PID matches a specific one if I need to get the drive letter of this flash drive. Thanks everyone!

Answer 1

WMI should be able to handle this ...

You will need to add a link to the System.Management dll, and you will need: "using System.Management"; line ... See the link at the bottom for screenshots, a more detailed explanation ...

using System.Management; // Get all the disk drives ManagementObjectSearcher mosDisks = new ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive"); // Loop through each object (disk) retrieved by WMI foreach (ManagementObject moDisk in mosDisks.Get()) { // Add the HDD to the list (use the Model field as the item caption) cmbHdd.Items.Add(moDisk["Model"].ToString()); } private void cmbHdd_SelectedIndexChanged(object sender, EventArgs e) { // Get all the disk drives from WMI that match the Model name selected in the ComboBox ManagementObjectSearcher mosDisks = new ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive WHERE Model = '" + cmbHdd.SelectedItem + "'"); // Loop through the drives retrieved, although it should normally be only one loop going on here foreach (ManagementObject moDisk in mosDisks.Get()) { // Set all the fields to the appropriate values lblType.Text = "Type: " + moDisk["MediaType"].ToString(); lblModel.Text = "Model: " + moDisk["Model"].ToString(); lblSerial.Text = "Serial: " + moDisk["SerialNumber"].ToString(); lblInterface.Text = "Interface: " + moDisk["InterfaceType"].ToString(); // The capacity in gigabytes is easily calculated lblCapacity.Text = "Capacity: " + moDisk["Size"].ToString() + " bytes (" + Math.Round(((((double)Convert.ToDouble(moDisk["Size"]) / 1024) / 1024) / 1024), 2) + " GB)"; lblPartitions.Text = "Partitions: " + moDisk["Partitions"].ToString(); lblSignature.Text = "Signature: " + moDisk["Signature"].ToString(); lblFirmware.Text = "Firmware: " + moDisk["FirmwareRevision"].ToString(); lblCylinders.Text = "Cylinders: " + moDisk["TotalCylinders"].ToString(); lblSectors.Text = "Sectors: " + moDisk["TotalSectors"].ToString(); lblHeads.Text = "Heads: " + moDisk["TotalHeads"].ToString(); lblTracks.Text = "Tracks: " + moDisk["TotalTracks"].ToString(); lblBytesPerSect.Text = "Bytes per Sector: " + moDisk["BytesPerSector"].ToString(); lblSectorsPerTrack.Text = "Sectors per Track: " + moDisk["SectorsPerTrack"].ToString(); lblTracksPerCyl.Text = "Tracks per Cylinder: " + moDisk["TracksPerCylinder"].ToString(); } } 

From MSDN, the win32 class for CIM_DiskDrive has the following parameters:

* "DeviceID" seems to be what you want ...

 class Win32_DiskDrive : CIM_DiskDrive { uint16 Availability; uint32 BytesPerSector; uint16 Capabilities[]; string CapabilityDescriptions[]; string Caption; string CompressionMethod; uint32 ConfigManagerErrorCode; boolean ConfigManagerUserConfig; string CreationClassName; uint64 DefaultBlockSize; string Description; string DeviceID; boolean ErrorCleared; string ErrorDescription; string ErrorMethodology; string FirmwareRevision; uint32 Index; datetime InstallDate; string InterfaceType; uint32 LastErrorCode; string Manufacturer; uint64 MaxBlockSize; uint64 MaxMediaSize; boolean MediaLoaded; string MediaType; uint64 MinBlockSize; string Model; string Name; boolean NeedsCleaning; uint32 NumberOfMediaSupported; uint32 Partitions; string PNPDeviceID; uint16 PowerManagementCapabilities[]; boolean PowerManagementSupported; uint32 SCSIBus; uint16 SCSILogicalUnit; uint16 SCSIPort; uint16 SCSITargetId; uint32 SectorsPerTrack; string SerialNumber; uint32 Signature; uint64 Size; string Status; uint16 StatusInfo; string SystemCreationClassName; string SystemName; uint64 TotalCylinders; uint32 TotalHeads; uint64 TotalSectors; uint64 TotalTracks; uint32 TracksPerCylinder; }; 

Top Portion oF Code taken from:

http://www.geekpedia.com/tutorial233_Getting-Disk-Drive-Information-using-WMI-and-Csharp.html

Answer 2

If you only need to check when the device is connected, the problem is much simpler. You need to check the DBT_DEVICEARRIVAL event. If you are creating a Windows Forms application, you can do this by implementing the IMessageFilter interface and passing it AddMessageFiler to Application . If you are not using the Forms application, you will need to infer the class from NativeWindow and override WndProc. Remember to call CreateHandle so that it is added to the Windows message queue.

Once you get the way to get DBT_DEVICEARRIVAL , you will need to parse it. (the following was not written in the IDE, so it has not been tested)

 // Constants from from Dbt.h const int WM_DEVICECHANGE = 0x219; const int DBT_DEVICEARRIVAL = 0x8000; const uint DBT_DEVTYP_DEVICEINTERFACE = 0x05; const Guid GUID_DEVINTERFACE_USB_DEVICE = new Guid("A5DCBF10-6530-11D2-901F-00C04FB951ED"); bool PreFilterMessage(ref Message m) { if(m.Msg == case WM_DEVICECHANGE && m.WParam == DBT_DEVICEARRIVAL) var broadcast = (DEV_BROADCAST_HDR)Marshal.PtrToStructure(pnt, typeof(DEV_BROADCAST_HDR)); if(broadcast.dbch_DeviceType == DBT_DEVTYP_DEVICEINTERFACE) { var devInterface = (DEV_BROADCAST_DEVICEINTERFACE)Marshal.PtrToStructure(pnt, typeof(DEV_BROADCAST_DEVICEINTERFACE)); if(devInterface.dbcc_classguid = GUID_DEVINTERFACE_USB_DEVICE) { // devInterface.dbcc_name will contain the VID and PID for example: // \\?\USB#Vid_067b&Pid_2517#6&12115ad4&2&1#{GUID} DoSomthingSpecial(devInterface.dbcc_name); } } } return false; } [StructLayout(LayoutKind.Sequential)] struct DEV_BROADCAST_HDR { public uint dbch_Size; public uint dbch_DeviceType; public uint dbch_Reserved; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public struct DEV_BROADCAST_DEVICEINTERFACE { public int dbcc_size; public int dbcc_devicetype; public int dbcc_reserved; public Guid dbcc_classguid; [MarshalAs(UnmanagedType.ByValTStr, SizeConst=255)] public string dbcc_name; } 

If you need to list all connected devices, I just recommend using the WMI method. If you want to see how to do this without WMI, check out the USBView code in the Windows Development Development Kit , this can help you get started.

Answer 3

 public static bool GetDriveVidPid(string szDriveName, ref ushort wVID, ref ushort wPID) { bool bResult = false; string szSerialNumberDevice = null; ManagementObject oLogicalDisk = new ManagementObject("Win32_LogicalDisk.DeviceID='" + szDriveName.TrimEnd('\\') + "'"); foreach(ManagementObject oDiskPartition in oLogicalDisk.GetRelated("Win32_DiskPartition")) { foreach(ManagementObject oDiskDrive in oDiskPartition.GetRelated("Win32_DiskDrive")) { string szPNPDeviceID = oDiskDrive["PNPDeviceID"].ToString(); if(!szPNPDeviceID.StartsWith("USBSTOR")) throw new Exception(szDriveName + " ist kein USB-Laufwerk."); string[] aszToken = szPNPDeviceID.Split(new char[] { '\\', '&' }); szSerialNumberDevice = aszToken[aszToken.Length - 2]; } } if(null != szSerialNumberDevice) { ManagementObjectSearcher oSearcher = new ManagementObjectSearcher(@"root\CIMV2", "Select * from Win32_USBHub"); foreach(ManagementObject oResult in oSearcher.Get()) { object oValue = oResult["DeviceID"]; if(oValue == null) continue; string szDeviceID = oValue.ToString(); string[] aszToken = szDeviceID.Split(new char[] { '\\' }); if(szSerialNumberDevice != aszToken[aszToken.Length - 1]) continue; int nTemp = szDeviceID.IndexOf(@"VID_"); if(0 > nTemp) continue; nTemp += 4; wVID = ushort.Parse(szDeviceID.Substring(nTemp, 4), System.Globalization.NumberStyles.AllowHexSpecifier); nTemp += 4; nTemp = szDeviceID.IndexOf(@"PID_", nTemp); if(0 > nTemp) continue; nTemp += 4; wPID = ushort.Parse(szDeviceID.Substring(nTemp, 4), System.Globalization.NumberStyles.AllowHexSpecifier); bResult = true; break; } } return bResult; }