c++通过wmi获得Win32_DiskDrive里面的CapabilityDescriptions等参数

//查询硬盘
//char b[]=“Here is the DiskDrive information:”;
char b[]=“硬盘的信息如下:”;

printf("\n\n %s",b);
pEnumerator->Release();
pEnumerator=NULL;hres = pSvc->ExecQuery(bstr_t("WQL"), bstr_t("SELECT * FROM Win32_DiskDrive where SCSILogicalUnit = 0"),WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL,&pEnumerator); //查询有效的电池信息
if (FAILED(hres))
{cout << ";;Query failed. "<< "Error code = 0x" << hex << hres << endl;pSvc->Release();pLoc->Release();     CoUninitialize();return 1;               // Program has failed.查询失败
}
while (pEnumerator)
{hres = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);  //Next函数if((0 == uReturn)||(0 == pclsObj))// if(0 == uReturn){break;}//获取字段的值VARIANT DisID;VARIANT DisDp;VARIANT DisCap;VARIANT DisMo;VARIANT DisMan;VARIANT DisSN;VARIANT DisD;VARIANT DisCD;VARIANT DisMBS;VARIANT DisMiBS;VARIANT DisSPT;VARIANT DisTC;VARIANT DisTH;VARIANT DisTS;VARIANT DisTT;VARIANT DisTPC;VARIANT DisFR;VARIANT DisIT;VARIANT Disize;//DisCD.bstrVal=0;   DisD.bstrVal=0;DisID.bstrVal=0;DisMBS.bstrVal=0;DisMiBS.bstrVal=0;DisSPT.bstrVal=0;DisTC.bstrVal=0;DisTH.bstrVal=0;DisTS.bstrVal=0;pclsObj->Get(L"DeviceID",0,&DisID,0,0);         printf("\n DeviceID:%ls",DisID.bstrVal);    // 设备名称 string，值为\\.\PHYSICALDRIVEDpclsObj->Get(L"Description",0,&DisDp,0,0);         printf("\n Description:%ls",DisDp.bstrVal);  //设备描述 stringpclsObj->Get(L"Caption",0,&DisCap,0,0);            printf("\n Caption:%ls",DisCap.bstrVal);    //设备说明 stringpclsObj->Get(L"Model",0,&DisMo,0,0);            printf("\n Model:%ls",DisMo.bstrVal);    //硬盘名称 stringpclsObj->Get(L"Manufacturer",0,&DisMan,0,0);           printf("\n Manufacturer:%ls",DisMan.bstrVal);  //生产厂家 stringpclsObj->Get(L"SerialNumber",0,&DisSN,0,0);          printf("\n SerialNumber:%ls",DisSN.bstrVal);  //硬盘序列号 stringpclsObj->Get(L"CapabilityDescriptions",0,&DisCD,0,0);     //因为CapabilityDescriptions是二维的指针safearray，所以不能用printf直接输出，要通过缓冲区把字符串存储下来再输出BSTR   (*buf)[2]=NULL;       if(FAILED(SafeArrayAccessData(DisCD.parray,  (void  **)&buf)))::MessageBoxA(NULL,"出毛病了。","提示",MB_OK   |   MB_ICONWARNING);   /*string str = _com_util::ConvertBSTRToString((*buf)[0]); string str1 = _com_util::ConvertBSTRToString((*buf)[1]); printf("\n CapabilityDescriptions:");   */_tprintf(_T("\n********** CapabilityDescriptions:%ls"),*buf[0]);    _tprintf(_T("\n********** CapabilityDescriptions:%ls"),(*buf)[1]);
/*  printf("\n  %s",str.c_str());printf("\n  %s",str1.c_str());*/       SafeArrayUnaccessData(DisCD.parray);   /*pclsObj->Get(L"Capabilities",0,&DisCD,0,0);   printf("\n CapabilityDescriptions:%d",DisCD.bVal);*/pclsObj->Get(L"DefaultBlockSize",0,&DisD,0,0);printf("\n DefaultBlockSize:%ls",DisD.bstrVal);   //硬盘默认分块大小  uint64pclsObj->Get(L"MaxBlockSize",0,&DisMBS,0,0);            printf("\n MaxBlockSize:%ls",DisMBS.bstrVal);    //硬盘最大分块大小 pclsObj->Get(L"MinBlockSize",0,&DisMiBS,0,0);            printf("\n MinBlockSize:%ls",DisMiBS.bstrVal);    //硬盘最小分块大小pclsObj->Get(L"SectorsPerTrack",0,&DisSPT,0,0);          printf("\n SectorsPerTrack:%d",DisSPT.bstrVal);    //硬盘扇区数  UInt32 pclsObj->Get(L"TotalCylinders",0,&DisTC,0,0);         printf("\n TotalCylinders:%ls",DisTC.bstrVal);    //硬盘柱面数 uinit64pclsObj->Get(L"TotalHeads",0,&DisTH,0,0);           printf("\n TotalHeads:%d",DisTH.bstrVal);     //磁盘总头数  UInt32pclsObj->Get(L"TotalSectors",0,&DisTS,0,0);         printf("\n TotalSectors:%ls",DisTS.bstrVal); //磁盘扇区数    uinit64pclsObj->Get(L"TotalTracks",0,&DisTT,0,0);//DisTT.bstrVal=0;printf("\n TotalTracks:%ls",DisTT.bstrVal);  //磁盘总道数  uinit64/*pclsObj->Get(L"TracksPerCylinder",0,&DisID,0,0);DisID.bstrVal=0;printf("\n TracksPerCylinder:%ls",DisID.bstrVal);       */pclsObj->Get(L"TracksPerCylinder",0,&DisTPC,0,0);//DisTPC.bstrVal=0;printf("\n TracksPerCylinder:%d",DisTPC.intVal);   //每柱磁道数 uinit32pclsObj->Get(L"FirmwareRevision",0,&DisFR,0,0);            //DisFR.bstrVal=0;printf("\n FirmwareRevision:%ls",DisFR.bstrVal);   //固件版本  stringpclsObj->Get(L"InterfaceType",0,&DisIT,0,0);         printf("\n InterfaceType:%ls",DisIT.bstrVal);    //接口类型  stringpclsObj->Get(L"Size",0,&Disize,0,0);          printf("\n Size:%ls",Disize.bstrVal);    //硬盘容量   uint 64//VariantClear(&DisID);VariantClear (&DisDp);VariantClear (&DisCap);VariantClear (&DisMo);VariantClear (&DisMan);VariantClear (&DisSN);VariantClear (&DisD);VariantClear (&DisCD);VariantClear (&DisMBS);VariantClear (&DisMiBS);VariantClear (&DisSPT);VariantClear (&DisTC);VariantClear (&DisTH);VariantClear (&DisTS);VariantClear (&DisTT);VariantClear (&DisTPC);VariantClear (&DisFR);VariantClear (&DisIT);VariantClear (&Disize);pclsObj->Release();
}

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c++通过wmi获得Win32_DiskDrive里面的CapabilityDescriptions等参数

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