代码源于codeproject,修改增加了读取设备标识的功能。BBS的朋友需要，顺便放到这里来
using System;
using System.Runtime.InteropServices;
using System.Text;
namespace DevClasses
{
/// <summary>
/// Summary description for Class.
/// </summary>
class DeviceClasses
{
/// <summary>
/// The main entry point for the application.
/// </summary>
public const int MAX_NAME_PORTS=7;
public const int RegDisposition_OpenExisting=(0x00000001);
// open key only if exists
public const int CM_REGISTRY_HARDWARE=(0x00000000);
public const int CR_SUCCESS = (0x00000000);
public const int CR_NO_SUCH_VALUE = (0x00000025);
public const int CR_INVALID_DATA = (0x0000001F);
public const int DIGCF_PRESENT = (0x00000002);
public const int DIOCR_INSTALLER = (0x00000001);
// MaximumAllowed access type to Reg.
public const int MAXIMUM_ALLOWED = (0x02000000);
[StructLayout(LayoutKind.Sequential)]
public class SP_DEVINFO_DATA
{
public int cbSize;
public Guid ClassGuid;
public int DevInst; // DEVINST handle
public ulong Reserved;
};
[DllImport("cfgmgr32.dll")]
public static extern UInt32
CM_Open_DevNode_Key(IntPtr dnDevNode, UInt32 samDesired,
UInt32 ulHardwareProfile,
UInt32 Disposition,IntPtr phkDevice, UInt32 ulFlags);
[DllImport("cfgmgr32.dll")]
public static extern UInt32
CM_Enumerate_Classes(UInt32 ClassIndex,ref Guid ClassGuid, UInt32 Params);
[DllImport("setupapi.dll")]//
public static extern Boolean
SetupDiClassNameFromGuidA(ref Guid ClassGuid,
StringBuilder ClassName, //char * ?
UInt32 ClassNameSize, ref UInt32 RequiredSize);
[DllImport("setupapi.dll")]
public static extern IntPtr
SetupDiGetClassDevsA(ref Guid ClassGuid, UInt32 Enumerator,
IntPtr hwndParent, UInt32 Flags);
[DllImport("setupapi.dll")]
public static extern Boolean
SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, UInt32 MemberIndex,
ref SP_DEVINFO_DATA DeviceInfoData);
[DllImport("setupapi.dll")]
public static extern Boolean
SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);
[DllImport("setupapi.dll")]
public static extern IntPtr
SetupDiGetClassDevsA(ref Guid ClassGuid, UInt32 samDesired,
UInt32 Flags, ref string hwndParent, IntPtr Reserved);
[DllImport("setupapi.dll")]
public static extern IntPtr
SetupDiOpenClassRegKeyExA(
ref Guid ClassGuid, UInt32 samDesired, int Flags, IntPtr MachineName,
UInt32 Reserved);
[DllImport("advapi32.dll")]
public static extern UInt32
RegQueryValueA(IntPtr KeyClass,UInt32 SubKey,
StringBuilder ClassDescription,ref UInt32 sizeB);
[DllImport("user32.dll")]
public static extern Boolean
CharToOem(String lpszSrc, StringBuilder lpszDst);
public static int EnumerateClasses(UInt32 ClassIndex,
ref StringBuilder ClassName, StringBuilder ClassDescription, ref string id,
ref bool DevicePresent)
{
Guid ClassGuid=Guid.Empty;
IntPtr NewDeviceInfoSet;
SP_DEVINFO_DATA DeviceInfoData;
UInt32 result;
StringBuilder name=new StringBuilder("");
bool resNam=false;
UInt32 RequiredSize=0;
IntPtr ptr;
result = CM_Enumerate_Classes(ClassIndex, ref ClassGuid,0);
ClassName=new StringBuilder("");
DevicePresent=false;
//incorrect device class:
if(result == CR_INVALID_DATA)
{
return -2;
}
//device class is absent
if(result == CR_NO_SUCH_VALUE)
{
return -1;
}
//bad param. - fatal error
if(result != CR_SUCCESS)
{
return -3;
}
name.Capacity=0;
resNam=SetupDiClassNameFromGuidA(ref ClassGuid,name,RequiredSize,ref RequiredSize);
if(RequiredSize > 0)
{
name.Capacity=(int)RequiredSize;
resNam=SetupDiClassNameFromGuidA(ref ClassGuid,name,RequiredSize,ref RequiredSize);
}
NewDeviceInfoSet=SetupDiGetClassDevsA(ref ClassGuid,0,IntPtr.Zero,DIGCF_PRESENT);
if(NewDeviceInfoSet.ToInt32() == -1)
{
DevicePresent=false;
ClassName=name;
id=ClassGuid.ToString();
return 0;}
IntPtr KeyClass=SetupDiOpenClassRegKeyExA(
ref ClassGuid, MAXIMUM_ALLOWED, DIOCR_INSTALLER,IntPtr.Zero,0);
if(KeyClass.ToInt32() == -1)
{
DevicePresent=false;
ClassName=name;
id=ClassGuid.ToString();
return 0;}
UInt32 sizeB=1000;
StringBuilder CD=new StringBuilder("");
ClassDescription.Capacity=1000;
UInt32 res=RegQueryValueA(KeyClass,0,ClassDescription,ref sizeB);
if(res != 0)ClassDescription=new StringBuilder("");
SetupDiDestroyDeviceInfoList(NewDeviceInfoSet);
ClassName=name;
id=ClassGuid.ToString();
DevicePresent=true;
return 0;
}
[STAThread]
static void Main(string[] args)
{
StringBuilder classes=new StringBuilder("");
StringBuilder classesDescr=new StringBuilder("");
StringBuilder classesDescrOEM=new StringBuilder("");
classesDescrOEM.Capacity=1000;
Boolean DevExist=false;
UInt32 i=0;
string id="";
while(true)
{
int res=EnumerateClasses(i,ref classes,classesDescr,ref id ,ref DevExist);
if(res == -1)break;
++i;
if(res < -1 || !DevExist)continue;
Console.WriteLine("ClassName={0}, Description={1},id={2}",classes,classesDescr,id);
}
return;
}
}
}
////////////////////////////////////////////////////////在我机子上运行结果//////////////////////////////////////////////////////////////////
ClassName=WCEUSBS, Description=Windows CE USB Devices,id=25dbce51-6c8f-4a72-8a6d
-b54c2b4fc835
ClassName=Security Accelerator, Description=Security Accelerators,id=268c95a1-ed
fe-11d3-95c3-0010dc4050a5
ClassName=USB, Description=通用串行总线控制器,id=36fc9e60-c465-11cf-8056-4445535
40000
ClassName=PnpPrinters, Description=IEEE 1394 和 SCSI 打印机,id=4658ee7e-f050-11d
1-b6bd-00c04fa372a7
ClassName=Dot4, Description=IEEE 1284.4 设备,id=48721b56-6795-11d2-b1a8-0080c72e
74a2
ClassName=Dot4Print, Description=IEEE 1284.4 兼容打印机,id=49ce6ac8-6f86-11d2-b1
e5-0080c72e74a2
ClassName=CDROM, Description=DVD/CD-ROM 驱动器,id=4d36e965-e325-11ce-bfc1-08002b
e10318
ClassName=Computer, Description=计算机,id=4d36e966-e325-11ce-bfc1-08002be10318
ClassName=DiskDrive, Description=磁盘驱动器,id=4d36e967-e325-11ce-bfc1-08002be10
318
ClassName=Display, Description=显示卡,id=4d36e968-e325-11ce-bfc1-08002be10318
ClassName=fdc, Description=软盘控制器,id=4d36e969-e325-11ce-bfc1-08002be10318
ClassName=hdc, Description=IDE ATA/ATAPI 控制器,id=4d36e96a-e325-11ce-bfc1-08002
be10318
ClassName=Keyboard, Description=键盘,id=4d36e96b-e325-11ce-bfc1-08002be10318
ClassName=MEDIA, Description=声音、视频和游戏控制器,id=4d36e96c-e325-11ce-bfc1-0
8002be10318
ClassName=Modem, Description=调制解调器,id=4d36e96d-e325-11ce-bfc1-08002be10318
ClassName=Monitor, Description=监视器,id=4d36e96e-e325-11ce-bfc1-08002be10318
ClassName=Mouse, Description=鼠标和其它指针设备,id=4d36e96f-e325-11ce-bfc1-08002
be10318
ClassName=MTD, Description=Memory technology driver,id=4d36e970-e325-11ce-bfc1-0
8002be10318
ClassName=MultiFunction, Description=多功能卡,id=4d36e971-e325-11ce-bfc1-08002be
10318
ClassName=Net, Description=网络适配器,id=4d36e972-e325-11ce-bfc1-08002be10318
ClassName=NetClient, Description=网络客户,id=4d36e973-e325-11ce-bfc1-08002be1031
8
ClassName=NetService, Description=网络服务,id=4d36e974-e325-11ce-bfc1-08002be103
18
ClassName=NetTrans, Description=网络协议,id=4d36e975-e325-11ce-bfc1-08002be10318
ClassName=PCMCIA, Description=PCMCIA 卡,id=4d36e977-e325-11ce-bfc1-08002be10318
ClassName=Ports, Description=端口 (COM 和 LPT),id=4d36e978-e325-11ce-bfc1-08002b
e10318
ClassName=Printer, Description=打印机,id=4d36e979-e325-11ce-bfc1-08002be10318
ClassName=SCSIAdapter, Description=SCSI 和 RAID 控制器,id=4d36e97b-e325-11ce-bfc
1-08002be10318
ClassName=System, Description=系统设备,id=4d36e97d-e325-11ce-bfc1-08002be10318
ClassName=Unknown, Description=其它设备,id=4d36e97e-e325-11ce-bfc1-08002be10318
ClassName=FloppyDisk, Description=软盘驱动器,id=4d36e980-e325-11ce-bfc1-08002be1
0318
ClassName=Processor, Description=处理器,id=50127dc3-0f36-415e-a6cc-4cb3be910b65
ClassName=MultiPortSerial, Description=多串口卡,id=50906cb8-ba12-11d1-bf5d-0000f
805f530
ClassName=SmartCardReader, Description=智能卡阅读器,id=50dd5230-ba8a-11d1-bf5d-0
000f805f530
ClassName=VolumeSnapshot, Description=存储卷影副本,id=533c5b84-ec70-11d2-9505-00
c04f79deaf
ClassName=Biometric, Description=Personal identification devices,id=53d29ef7-377
c-4d14-864b-eb3a85769359
ClassName=1394, Description=IEEE 1394 总线主控制器,id=6bdd1fc1-810f-11d0-bec7-08
002be2092f
ClassName=Infrared, Description=红外线设备,id=6bdd1fc5-810f-11d0-bec7-08002be209
2f
ClassName=Image, Description=图像处理设备,id=6bdd1fc6-810f-11d0-bec7-08002be2092
f
ClassName=TapeDrive, Description=磁带驱动器,id=6d807884-7d21-11cf-801c-08002be10
318
ClassName=Volume, Description=存储卷,id=71a27cdd-812a-11d0-bec7-08002be2092f
ClassName=Battery, Description=电池,id=72631e54-78a4-11d0-bcf7-00aa00b7b32a
ClassName=HIDClass, Description=人体学接口设备,id=745a17a0-74d3-11d0-b6fe-00a0c9
0f57da
ClassName=61883, Description=61883 设备类,id=7ebefbc0-3200-11d2-b4c2-00a0c9697d0
7
ClassName=LegacyDriver, Description=非即插即用驱动程序,id=8ecc055d-047f-11d1-a53
7-0000f8753ed1
ClassName=Avc, Description=AVC 设备类,id=c06ff265-ae09-48f0-812c-16753d7cba83
ClassName=Enum1394, Description=IEEE 1394 IP 网络计数器,id=c459df55-db08-11d1-b0
09-00a0c9081ff6
ClassName=MediumChanger, Description=介质变换器,id=ce5939ae-ebde-11d0-b181-0000f
8753ec4
ClassName=SBP2, Description=SBP2 IEEE 1394 设备,id=d48179be-ec20-11d1-b6b8-00c04
fa372a7
