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I am trying to get a value from windows device manager(windows 7).
The property name i am searching for is Bus Reported Device Description.
I am using the below code to get device name.
Please help me to get the Bus reported device description.
void OtherDevices()
{
ManagementObjectSearcher deviceList = new ManagementObjectSearcher("Select Name, Status from Win32_PnPEntity");
if (deviceList != null)
{
foreach (ManagementObject device in deviceList.Get())
{
string name = device.GetPropertyValue("Name").ToString();
if (name.Contains("iC5000"))
{
dgv_HWlist.Rows.Add(name);
// break;
}
}
}
}
555
namespace flash_tool.common.Utils
{
using System;
using System.Text;
using System.Runtime.InteropServices;
using System.Collections.Generic;
public class Win32DeviceMgmt
{
[Flags]
public enum DiGetClassFlags : uint
{
DIGCF_DEFAULT = 0x00000001, // only valid with DIGCF_DEVICEINTERFACE
DIGCF_PRESENT = 0x00000002,
DIGCF_ALLCLASSES = 0x00000004,
DIGCF_PROFILE = 0x00000008,
DIGCF_DEVICEINTERFACE = 0x00000010,
}
/// <summary>
/// Device registry property codes
/// </summary>
public enum SPDRP : uint
{
/// <summary>
/// DeviceDesc (R/W)
/// </summary>
SPDRP_DEVICEDESC = 0x00000000,
/// <summary>
/// HardwareID (R/W)
/// </summary>
SPDRP_HARDWAREID = 0x00000001,
/// <summary>
/// CompatibleIDs (R/W)
/// </summary>
SPDRP_COMPATIBLEIDS = 0x00000002,
/// <summary>
/// unused
/// </summary>
SPDRP_UNUSED0 = 0x00000003,
/// <summary>
/// Service (R/W)
/// </summary>
SPDRP_SERVICE = 0x00000004,
/// <summary>
/// unused
/// </summary>
SPDRP_UNUSED1 = 0x00000005,
/// <summary>
/// unused
/// </summary>
SPDRP_UNUSED2 = 0x00000006,
/// <summary>
/// Class (R--tied to ClassGUID)
/// </summary>
SPDRP_CLASS = 0x00000007,
/// <summary>
/// ClassGUID (R/W)
/// </summary>
SPDRP_CLASSGUID = 0x00000008,
/// <summary>
/// Driver (R/W)
/// </summary>
SPDRP_DRIVER = 0x00000009,
/// <summary>
/// ConfigFlags (R/W)
/// </summary>
SPDRP_CONFIGFLAGS = 0x0000000A,
/// <summary>
/// Mfg (R/W)
/// </summary>
SPDRP_MFG = 0x0000000B,
/// <summary>
/// FriendlyName (R/W)
/// </summary>
SPDRP_FRIENDLYNAME = 0x0000000C,
/// <summary>
/// LocationInformation (R/W)
/// </summary>
SPDRP_LOCATION_INFORMATION = 0x0000000D,
/// <summary>
/// PhysicalDeviceObjectName (R)
/// </summary>
SPDRP_PHYSICAL_DEVICE_OBJECT_NAME = 0x0000000E,
/// <summary>
/// Capabilities (R)
/// </summary>
SPDRP_CAPABILITIES = 0x0000000F,
/// <summary>
/// UiNumber (R)
/// </summary>
SPDRP_UI_NUMBER = 0x00000010,
/// <summary>
/// UpperFilters (R/W)
/// </summary>
SPDRP_UPPERFILTERS = 0x00000011,
/// <summary>
/// LowerFilters (R/W)
/// </summary>
SPDRP_LOWERFILTERS = 0x00000012,
/// <summary>
/// BusTypeGUID (R)
/// </summary>
SPDRP_BUSTYPEGUID = 0x00000013,
/// <summary>
/// LegacyBusType (R)
/// </summary>
SPDRP_LEGACYBUSTYPE = 0x00000014,
/// <summary>
/// BusNumber (R)
/// </summary>
SPDRP_BUSNUMBER = 0x00000015,
/// <summary>
/// Enumerator Name (R)
/// </summary>
SPDRP_ENUMERATOR_NAME = 0x00000016,
/// <summary>
/// Security (R/W, binary form)
/// </summary>
SPDRP_SECURITY = 0x00000017,
/// <summary>
/// Security (W, SDS form)
/// </summary>
SPDRP_SECURITY_SDS = 0x00000018,
/// <summary>
/// Device Type (R/W)
/// </summary>
SPDRP_DEVTYPE = 0x00000019,
/// <summary>
/// Device is exclusive-access (R/W)
/// </summary>
SPDRP_EXCLUSIVE = 0x0000001A,
/// <summary>
/// Device Characteristics (R/W)
/// </summary>
SPDRP_CHARACTERISTICS = 0x0000001B,
/// <summary>
/// Device Address (R)
/// </summary>
SPDRP_ADDRESS = 0x0000001C,
/// <summary>
/// UiNumberDescFormat (R/W)
/// </summary>
SPDRP_UI_NUMBER_DESC_FORMAT = 0X0000001D,
/// <summary>
/// Device Power Data (R)
/// </summary>
SPDRP_DEVICE_POWER_DATA = 0x0000001E,
/// <summary>
/// Removal Policy (R)
/// </summary>
SPDRP_REMOVAL_POLICY = 0x0000001F,
/// <summary>
/// Hardware Removal Policy (R)
/// </summary>
SPDRP_REMOVAL_POLICY_HW_DEFAULT = 0x00000020,
/// <summary>
/// Removal Policy Override (RW)
/// </summary>
SPDRP_REMOVAL_POLICY_OVERRIDE = 0x00000021,
/// <summary>
/// Device Install State (R)
/// </summary>
SPDRP_INSTALL_STATE = 0x00000022,
/// <summary>
/// Device Location Paths (R)
/// </summary>
SPDRP_LOCATION_PATHS = 0x00000023,
}
private const UInt32 DICS_FLAG_GLOBAL = 0x00000001;
private const UInt32 DIREG_DEV = 0x00000001;
private const UInt32 KEY_QUERY_VALUE = 0x0001;
/// <summary>
/// The SP_DEVINFO_DATA structure defines a device instance that is a member of a device information set.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
private struct SP_DEVINFO_DATA
{
public UInt32 cbSize;
public Guid ClassGuid;
public UInt32 DevInst;
public UIntPtr Reserved;
};
[StructLayout(LayoutKind.Sequential)]
struct DEVPROPKEY
{
public Guid fmtid;
public UInt32 pid;
}
[DllImport("setupapi.dll")]
private static extern Int32 SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);
[DllImport("setupapi.dll", SetLastError = true)]
private static extern bool SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, UInt32 MemberIndex, ref SP_DEVINFO_DATA DeviceInterfaceData);
[DllImport("setupapi.dll", SetLastError = true)]
private static extern IntPtr SetupDiGetClassDevs(ref Guid gClass, UInt32 iEnumerator, UInt32 hParent, DiGetClassFlags nFlags);
[DllImport("Setupapi", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr SetupDiOpenDevRegKey(IntPtr hDeviceInfoSet, ref SP_DEVINFO_DATA deviceInfoData, uint scope,
uint hwProfile, uint parameterRegistryValueKind, uint samDesired);
[DllImport("advapi32.dll", CharSet = CharSet.Unicode, EntryPoint = "RegQueryValueExW", SetLastError = true)]
private static extern int RegQueryValueEx(IntPtr hKey, string lpValueName, int lpReserved, out uint lpType,
byte[] lpData, ref uint lpcbData);
[DllImport("advapi32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int RegCloseKey(IntPtr hKey);
[DllImport("kernel32.dll")]
private static extern Int32 GetLastError();
const int BUFFER_SIZE = 1024;
[DllImport("setupapi.dll", SetLastError = true)]
static extern bool SetupDiClassGuidsFromName(string ClassName,
ref Guid ClassGuidArray1stItem, UInt32 ClassGuidArraySize,
out UInt32 RequiredSize);
[DllImport("setupapi.dll")]
private static extern Int32 SetupDiClassNameFromGuid(ref Guid ClassGuid,
StringBuilder className, Int32 ClassNameSize, ref Int32 RequiredSize);
/// <summary>
/// The SetupDiGetDeviceRegistryProperty function retrieves the specified device property.
/// This handle is typically returned by the SetupDiGetClassDevs or SetupDiGetClassDevsEx function.
/// </summary>
/// <param Name="DeviceInfoSet">Handle to the device information set that contains the interface and its underlying device.</param>
/// <param Name="DeviceInfoData">Pointer to an SP_DEVINFO_DATA structure that defines the device instance.</param>
/// <param Name="Property">Device property to be retrieved. SEE MSDN</param>
/// <param Name="PropertyRegDataType">Pointer to a variable that receives the registry data Type. This parameter can be NULL.</param>
/// <param Name="PropertyBuffer">Pointer to a buffer that receives the requested device property.</param>
/// <param Name="PropertyBufferSize">Size of the buffer, in bytes.</param>
/// <param Name="RequiredSize">Pointer to a variable that receives the required buffer size, in bytes. This parameter can be NULL.</param>
/// <returns>If the function succeeds, the return value is nonzero.</returns>
[DllImport("setupapi.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern bool SetupDiGetDeviceRegistryProperty(
IntPtr DeviceInfoSet,
ref SP_DEVINFO_DATA DeviceInfoData,
SPDRP Property,
out UInt32 PropertyRegDataType,
byte[] PropertyBuffer,
uint PropertyBufferSize,
out UInt32 RequiredSize);
[DllImport("setupapi.dll", SetLastError = true)]
static extern bool SetupDiGetDevicePropertyW(
IntPtr deviceInfoSet,
[In] ref SP_DEVINFO_DATA DeviceInfoData,
[In] ref DEVPROPKEY propertyKey,
[Out] out UInt32 propertyType,
byte[] propertyBuffer,
UInt32 propertyBufferSize,
out UInt32 requiredSize,
UInt32 flags);
const int utf16terminatorSize_bytes = 2;
public struct DeviceInfo
{
public string name;
public string description;
public string bus_description;
}
static DEVPROPKEY DEVPKEY_Device_BusReportedDeviceDesc;
static Win32DeviceMgmt()
{
DEVPKEY_Device_BusReportedDeviceDesc = new DEVPROPKEY();
DEVPKEY_Device_BusReportedDeviceDesc.fmtid = new Guid(0x540b947e, 0x8b40, 0x45bc, 0xa8, 0xa2, 0x6a, 0x0b, 0x89, 0x4c, 0xbd, 0xa2);
DEVPKEY_Device_BusReportedDeviceDesc.pid = 4;
}
public static List<DeviceInfo> GetAllCOMPorts()
{
Guid[] guids = GetClassGUIDs("Ports");
List<DeviceInfo> devices = new List<DeviceInfo>();
for (int index = 0; index < guids.Length; index++)
{
IntPtr hDeviceInfoSet = SetupDiGetClassDevs(ref guids[index], 0, 0, DiGetClassFlags.DIGCF_PRESENT);
if (hDeviceInfoSet == IntPtr.Zero)
{
throw new Exception("Failed to get device information set for the COM ports");
}
try
{
UInt32 iMemberIndex = 0;
while (true)
{
SP_DEVINFO_DATA deviceInfoData = new SP_DEVINFO_DATA();
deviceInfoData.cbSize = (uint)Marshal.SizeOf(typeof(SP_DEVINFO_DATA));
bool success = SetupDiEnumDeviceInfo(hDeviceInfoSet, iMemberIndex, ref deviceInfoData);
if (!success)
{
// No more devices in the device information set
break;
}
DeviceInfo deviceInfo = new DeviceInfo();
deviceInfo.name = GetDeviceName(hDeviceInfoSet, deviceInfoData);
deviceInfo.description = GetDeviceDescription(hDeviceInfoSet, deviceInfoData);
deviceInfo.bus_description = GetDeviceBusDescription(hDeviceInfoSet, deviceInfoData);
devices.Add(deviceInfo);
iMemberIndex++;
}
}
finally
{
SetupDiDestroyDeviceInfoList(hDeviceInfoSet);
}
}
return devices;
}
private static string GetDeviceName(IntPtr pDevInfoSet, SP_DEVINFO_DATA deviceInfoData)
{
IntPtr hDeviceRegistryKey = SetupDiOpenDevRegKey(pDevInfoSet, ref deviceInfoData,
DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_QUERY_VALUE);
if (hDeviceRegistryKey == IntPtr.Zero)
{
throw new Exception("Failed to open a registry key for device-specific configuration information");
}
byte[] ptrBuf = new byte[BUFFER_SIZE];
uint length = (uint)ptrBuf.Length;
try
{
uint lpRegKeyType;
int result = RegQueryValueEx(hDeviceRegistryKey, "PortName", 0, out lpRegKeyType, ptrBuf, ref length);
if (result != 0)
{
throw new Exception("Can not read registry value PortName for device " + deviceInfoData.ClassGuid);
}
}
finally
{
RegCloseKey(hDeviceRegistryKey);
}
return Encoding.Unicode.GetString(ptrBuf, 0, (int)length - utf16terminatorSize_bytes);
}
private static string GetDeviceDescription(IntPtr hDeviceInfoSet, SP_DEVINFO_DATA deviceInfoData)
{
byte[] ptrBuf = new byte[BUFFER_SIZE];
uint propRegDataType;
uint RequiredSize;
bool success = SetupDiGetDeviceRegistryProperty(hDeviceInfoSet, ref deviceInfoData, SPDRP.SPDRP_DEVICEDESC,
out propRegDataType, ptrBuf, BUFFER_SIZE, out RequiredSize);
if (!success)
{
throw new Exception("Can not read registry value PortName for device " + deviceInfoData.ClassGuid);
}
return Encoding.Unicode.GetString(ptrBuf, 0, (int)RequiredSize - utf16terminatorSize_bytes);
}
private static string GetDeviceBusDescription(IntPtr hDeviceInfoSet, SP_DEVINFO_DATA deviceInfoData)
{
byte[] ptrBuf = new byte[BUFFER_SIZE];
uint propRegDataType;
uint RequiredSize;
bool success = SetupDiGetDevicePropertyW(hDeviceInfoSet, ref deviceInfoData, ref DEVPKEY_Device_BusReportedDeviceDesc,
out propRegDataType, ptrBuf, BUFFER_SIZE, out RequiredSize, 0);
if (!success)
{
throw new Exception("Can not read Bus provided device description device " + deviceInfoData.ClassGuid);
}
return System.Text.UnicodeEncoding.Unicode.GetString(ptrBuf, 0, (int)RequiredSize - utf16terminatorSize_bytes);
}
private static Guid[] GetClassGUIDs(string className)
{
UInt32 requiredSize = 0;
Guid[] guidArray = new Guid[1];
bool status = SetupDiClassGuidsFromName(className, ref guidArray[0], 1, out requiredSize);
if (true == status)
{
if (1 < requiredSize)
{
guidArray = new Guid[requiredSize];
SetupDiClassGuidsFromName(className, ref guidArray[0], requiredSize, out requiredSize);
}
}
else
throw new System.ComponentModel.Win32Exception();
return guidArray;
}
}
}
To go off of vromanov's code. All you have to do is the following to get the bus description of each com port, where 0 is the First Com, 1 would be the second, and so on.
Console.WriteLine(Win32DeviceMgmt.GetAllCOMPorts()[0].bus_description);
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