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 
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