如何通过WMI COM获取BcdObject？ [英] how can I get the BcdObject by WMI COM?

问题描述

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感谢您的关注!!

我尝试通过Bcd API获取/设置启动配置，我使用WMI COM和c ++来完成它，我的工具是VC8，但我遇到了一个问题：

当我调用IWbemClassObject :: GetMethod时，返回的结果是WBEM_E_ILLEGAL_OPERATION，

when I call IWbemClassObject::GetMethod, it return result is WBEM_E_ILLEGAL_OPERATION ,

我想知道如何获得有效的BcdObject实例？

I want to know how can I get a valid BcdObject instance?

我的代码如下：

// init WMI COM

// init WMI COM

// init IWbemLocator，获取实例，pLoc

// init IWbemLocator, got the instance , pLoc

//连接到命名空间" root \\wmi"并得到了IWbemServices pSvc的实例;

// connect to namespace "root\\wmi" and got the instance of IWbemServices pSvc;

BSTR bstrClsName = SysAllocString（L" BcdStore"）;
IWbemClassObject * pWbmBcd = NULL;
hr = pSvc-> ; GetObject（bstrClsName，0，NULL，& pWbmBcd，NULL）;
if（hr == WBEM_S_NO_ERROR）
{
VARIANT variant1;

IWbemClassObject * pInParamaterClass = NULL;
IWbemClassObject * pOutParamaterClass = NULL;
IWbemClassObject * pInParam = NULL;
IWbemClassObject * pOutParam = NULL;
IWbemCallResult * pCallResult = NULL;

BSTR bstrClsName = SysAllocString (L"BcdStore");
  IWbemClassObject *pWbmBcd = NULL;
  hr = pSvc->GetObject(bstrClsName, 0, NULL, &pWbmBcd, NULL);
  if (hr == WBEM_S_NO_ERROR)
  {
   VARIANT variant1;
  
   IWbemClassObject *pInParamaterClass = NULL;
   IWbemClassObject *pOutParamaterClass = NULL;
   IWbemClassObject *pInParam = NULL;
   IWbemClassObject *pOutParam = NULL;
   IWbemCallResult *pCallResult = NULL;

BSTR bstrMthdName = SysAllocString（L" OpenStore"）;

   BSTR bstrMthdName = SysAllocString (L"OpenStore");

hr = pWbmBcd-> GetMethod（bstrMthdName，0，& pInParamaterClass，NULL）;

if（ hr == WBEM_S_NO_ERROR）
{
if（NULL！= pInParamaterClass）
{
hr = pInParamaterClass-> SpawnInstance（0，& pInParam）;
//创建实例副本< BR>如果（WBEM_S_NO _ERROR == hr）
{
//设置每个属性
VariantInit（& variant1）;
V_VT（& variant1）= VT_BSTR;
V_BSTR（& variant1）= SysAllocString （L""）;
hr = pInParam-> Put（L" File"，0，& variant1,0）;
VariantClear（& variant1）;
}
}
}

   hr = pWbmBcd->GetMethod(bstrMthdName, 0, &pInParamaterClass, NULL);
   
   if (hr == WBEM_S_NO_ERROR)
   {
    if( NULL != pInParamaterClass)
    {
     hr=pInParamaterClass->SpawnInstance(0, &pInParam);
     // create instance copy
     if(WBEM_S_NO_ERROR ==  hr)
     {
      // set each property
      VariantInit(&variant1);
      V_VT(&variant1) = VT_BSTR;
      V_BSTR(&variant1) = SysAllocString(L"");
      hr = pInParam->Put(L"File", 0, &variant1, 0);
      VariantClear(&variant1);
     }
    }
   }

if（WBEM_S_NO_ERROR == hr&& pInParam！= NULL）




BSTR bstrObjectName = SysAllocString（L" \\\\\\\\\\\\\\\\\\\\\\\\\ ;
hr = pSvc-> ExecMethod（bstrObjectName，bstrMthdName，0
，NULL，pInParam，& pOutParam，& pCallResult）;

   if (WBEM_S_NO_ERROR == hr && pInParam != NULL)
   {
    BSTR bstrObjectName = SysAllocString (L"\\\\mypc\\ROOT\\WMI:BcdStore");
    hr = pSvc->ExecMethod(bstrObjectName, bstrMthdName, 0
     , NULL, pInParam, &pOutParam, &pCallResult);
    

long lResult = 0;
if（pCallResult！= NULL）
{
pCallResult-> GetCallStatus（WBEM_INFINITE，& lResult）;
hr = pCallResult-> GetResultObject（0，& ; pOutParamaterClass）;
pCallResult-> Release（）;
pCallResult = NULL;
}

    long lResult = 0;
    if (pCallResult != NULL)
    {
     pCallResult->GetCallStatus(WBEM_INFINITE, &lResult);
     hr = pCallResult->GetResultObject(0, &pOutParamaterClass);
     pCallResult->Release();
     pCallResult = NULL;
    }

pInParam-> Release（）;
pInParam = NULL;
pInParamaterClass - > Release（）;
pInParamaterClass = NULL;

    pInParam->Release();
    pInParam = NULL;
    pInParamaterClass ->Release();
    pInParamaterClass = NULL;

SysFreeString（bstrMthdName）;

    SysFreeString(bstrMthdName);

if（pOutParamaterClass！= NULL&& hr == WBEM_S_NO_ERROR）
{
VariantI nit（& variant1）;
hr = pOutParamaterClass-> Get（L" Store"，0，& variant1,0,0）;

if（variant1.punkVal！= NULL）< br> {
IWbemClassObject * pGotBcdStore = NULL;

 if (pOutParamaterClass != NULL && hr == WBEM_S_NO_ERROR)
    {
      VariantInit(&variant1);
     hr = pOutParamaterClass->Get(L"Store", 0, &variant1, 0, 0);
     
     if (variant1.punkVal != NULL)
     {
           IWbemClassObject *pGotBcdStore = NULL;

hr = variant1.punkVal - > QueryInterface（IID_IWbemClassObject，（void **）& pGotBcdStore）;

 hr = variant1.punkVal->QueryInterface(IID_IWbemClassObject, (void **)&pGotBcdStore);     

if（SUCCEEDED（hr））

if (SUCCEEDED(hr))

{

hr = pGotBcdStore-> GetMethod（L" OpenObject"，0& pInParamaterClass，NULL）;

< font color ="＃ff0000"> //返回结果是WBEM_E_ILLEGAL_OPERATION，

会发生什么？

我的代码中是否有错误？

Are there some error in my code upon?

非常感谢！

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