【收藏】通过 WMI 获取系统信息

王朝other·作者佚名  2006-01-09
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通过 WMI 获取系统信息

WMI: Windows Management Instrumentation (Windows 管理工具)

通过 WMI 可以获取主板、BIOS、磁盘、显卡、网络等几乎所有的系统信息。 利用这个工具可以管理本地或客户端系统中几乎所有的信息。很多网络管理工具都是基于WMI开发的。在 Windows NT/2000/XP/2003 都有这个工具, 在 Windows 98 里面可以选择安装这个工具。

① 初始化 COM 接口:

访问 WMI, 必须先初始化 COM 接口, 在程序的一开始调用 CoInitialize(NULL); 初始化, 在结束时调用 CoUninitialize(); 释放资源。

这两个函数在 #include <comdef.h> 里面定义。

② 获取访问 WMI 权限:

CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_PKT, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, 0);

如果这个函数返回 S_OK 获取权限成功, 否则为失败。

③ 通过 IWbemLocator 和 IWbemServices 这两个 COM 接口访问 WMI, 获取系统信息:

这个函数的参数: lpList 返回信息, wsClass 为要查找的系统信息类, 这些 COM 接口在 #include <wbemidl.h> 里定义。

void GetWmiInfo(CString lpList, WideString wsClass)

{

IWbemLocator *pWbemLocator = NULL;

if(CoCreateInstance(CLSID_WbemAdministrativeLocator, NULL, CLSCTX_INPROC_SERVER|CLSCTX_LOCAL_SERVER, IID_IUnknown, (void**)&pWbemLocator) == S_OK)

{

IWbemServices *pWbemServices = NULL;

WideString wsNamespace = (L"root\\cimv2");

if(pWbemLocator->ConnectServer(wsNamespace, NULL, NULL, NULL, 0, NULL, NULL, &pWbemServices) == S_OK)

{

IEnumWbemClassObject *pEnumClassObject = NULL;

WideString wsWQL=L"WQL", wsQuery=WideString(L"Select * from ")+wsClass;

if(pWbemServices->ExecQuery(wsWQL, wsQuery, WBEM_FLAG_RETURN_IMMEDIATELY,NULL, &pEnumClassObject) == S_OK)

{

IWbemClassObject *pClassObject = NULL;

ULONG uCount = 1, uReturned;

if(pEnumClassObject->Reset() == S_OK)

{

int iEnumIdx = 0;

while(pEnumClassObject->Next(WBEM_INFINITE, uCount, &pClassObject, &uReturned) == S_OK)

{

lpList += "---------------- ["+IntToStr(iEnumIdx)+"] -----------------");

SAFEARRAY *pvNames = NULL;

if(pClassObject->GetNames(NULL, WBEM_FLAG_ALWAYS | WBEM_MASK_CONDITION_ORIGIN, NULL, &pvNames) == S_OK)

{

long vbl, vbu;

SafeArrayGetLBound(pvNames, 1, &vbl);

SafeArrayGetUBound(pvNames, 1, &vbu);

for(long idx=vbl; idx<=vbu; idx++)

{

long aidx = idx;

wchar_t *wsName = 0;

VARIANT vValue;

VariantInit(&vValue);

SafeArrayGetElement(pvNames, &aidx, &wsName);

BSTR bs = SysAllocString(wsName);

HRESULT hRes = pClassObject->Get(bs, 0, &vValue, NULL, 0);

SysFreeString(bs);

if(hRes == S_OK)

{

AnsiString s;

Variant v = *(Variant*)&vValue;

if(v.IsArray())

{

for(int i=v.ArrayLowBound(); i<=v.ArrayHighBound(); i++)

{

Variant a = v.GetElement(i);

if(!s.IsEmpty())

s+=", ";

s+=VarToStr(a);

}

}

else

{

s = VarToStr(v);

}

lpList += CString(wsName) + "=" + s;

}

VariantClear(&vValue);

SysFreeString(wsName);

}

}

if(pvNames)SafeArrayDestroy(pvNames);

iEnumIdx++;

}

}

if(pClassObject)pClassObject->Release();

}

if(pEnumClassObject)pEnumClassObject->Release();

}

if(pWbemServices)pWbemServices->Release();

}

if(pWbemLocator)pWbemLocator->Release();

}

//---------------------------------------------------------------------------

WMI 可以访问的信息类型有:

Win32_1394Controller

Win32_BaseBoard

Win32_Battery

Win32_BIOS

Win32_Bus

Win32_CacheMemory

Win32_CDROMDrive

Win32_CurrentProbe

Win32_DesktopMonitor

Win32_DeviceMemoryAddress

Win32_DiskDrive

Win32_DisplayConfiguration

Win32_DisplayControllerConfiguration

Win32_DMAChannel

Win32_Fan

Win32_FloppyController

Win32_FloppyDrive

Win32_HeatPipe

Win32_IDEController

Win32_InfraredDevice

Win32_IRQResource

Win32_Keyboard

Win32_MemoryArray

Win32_MemoryDevice

Win32_MotherboardDevice

Win32_NetworkAdapter

Win32_NetworkAdapterConfiguration

Win32_OnBoardDevice

Win32_ParallelPort

Win32_PCMCIAController

Win32_PhysicalMemory

Win32_PhysicalMemoryArray

Win32_PnPEntity

Win32_PointingDevice

Win32_PortableBattery

Win32_PortConnector

Win32_PortResource

Win32_POTSModem

Win32_PowerManagementEvent

Win32_Printer

Win32_PrinterConfiguration

Win32_PrintJob

Win32_Processor

Win32_Refrigeration

Win32_SerialPort

Win32_SerialPortConfiguration

Win32_SMBIOSMemory

Win32_SoundDevice

Win32_SystemEnclosure

Win32_SystemMemoryResource

Win32_SystemSlot

Win32_TapeDrive

Win32_TemperatureProbe

Win32_UninterruptiblePowerSupply

Win32_USBController

Win32_VideoConfiguration

Win32_VideoController

Win32_VoltageProbe

以上类型(字符串值)通过前面写的函数 GetWmiInfo 可以得到相应的信息, 例如 GetWmiInfo(strInfo, "WIN32_bios");

 
 
 
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