来自WBEM_E_INVALID_METHOD_PARAMETERS的ExecMethod错误
来自WBEM_E_INVALID_METHOD_PARAMETERS的ExecMethod错误
提问于 2015-05-13 17:42:48
我试图使用SoftwareLicensingService::InstallProductKey在Windows 7上通过服务中的WMI/C++安装产品密钥。但是，每次我试图通过IWbemServices::ExecMethod调用该方法时，我都会得到0x8004102f，即WBEM_E_INVALID_METHOD_PARAMETERS。我认为这与我传递的产品密钥有关，但从那时起，我尝试了类似的Win32_WindowsProductActivation::ActivateOnline代码，这是XP上可用的无参数方法，但也有相同的错误。有人知道我下面的代码片段中有什么可疑之处吗(我跳过了一些清理代码，以便简短)？但是，相同的代码序列成功地调用了其他WMI方法。
int _tmain(int argc, _TCHAR* argv[])
{
HRESULT hr = S_OK;
IWbemLocator *pLoc = NULL;
IWbemServices *pServices = NULL;
IWbemClassObject *pInputParamsClass = NULL;
IWbemClassObject *pInputParams = NULL;
IWbemClassObject *pOutputParams = NULL;
IWbemClassObject *pLicensingClsObj = NULL;
VARIANT vtProductKey = {0};
VARIANT vtPath = {0};
hr = CoInitializeEx(0, COINIT_MULTITHREADED);
if(FAILED(hr))
goto cleanup;
hr = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_DEFAULT,
RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);
_ASSERT(SUCCEEDED(hr));
if(FAILED(hr))
goto cleanup;
hr = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER,
IID_IWbemLocator, (LPVOID *)&pLoc);
_ASSERT(SUCCEEDED(hr) && (NULL != pLoc));
if(FAILED(hr) || (NULL == pLoc))
goto cleanup;
hr = pLoc->ConnectServer(_bstr_t(L"ROOT\\CIMV2"), NULL, NULL, 0, NULL,
0, 0, &pServices);
_ASSERT(SUCCEEDED(hr) && (NULL != pServices));
if(FAILED(hr) || (NULL == pServices))
goto cleanup;
hr = CoSetProxyBlanket(pServices, RPC_C_AUTHN_WINNT,
RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE,
NULL, EOAC_NONE);
_ASSERT(SUCCEEDED(hr));
if(FAILED(hr))
goto cleanup;
hr = pServices->GetObject(_bstr_t(L"SoftwareLicensingService"),
0, NULL, &pLicensingClsObj, NULL);
_ASSERT(SUCCEEDED(hr) && (NULL != pLicensingClsObj));
if(FAILED(hr) || (NULL == pLicensingClsObj))
goto cleanup;
hr = pLicensingClsObj->Get(L"__Path", 0, &vtPath, 0, 0);
_ASSERT(SUCCEEDED(hr));
if(FAILED(hr))
goto cleanup;
hr = pLicensingClsObj->GetMethod(L"InstallProductKey", 0,
&pInputParamsClass, NULL);
_ASSERT(SUCCEEDED(hr) && (NULL != pInputParamsClass));
if(FAILED(hr) || (NULL == pInputParamsClass))
goto cleanup;
hr = pInputParamsClass->SpawnInstance(0, &pInputParams);
_ASSERT(SUCCEEDED(hr) && (NULL != pInputParams));
if(FAILED(hr) || (NULL == pInputParams))
goto cleanup;
vtProductKey.vt = VT_BSTR;
vtProductKey.bstrVal = SysAllocString(L"XXXXXXXXXXXXXXXXXXXXXXXXX");
hr = pInputParams->Put(L"ProductKey", 0, &vtProductKey, 0);
_ASSERT(SUCCEEDED(hr));
if(FAILED(hr))
goto cleanup;
hr = pServices->ExecMethod(vtPath.bstrVal,
_bstr_t(L"InstallProductKey"),
0, NULL, pInputParams,
&pOutputParams, NULL);
_ASSERT(SUCCEEDED(hr) && (NULL != pOutputParams));
if(FAILED(hr) || (NULL == pOutputParams))
goto cleanup;
hr = S_OK;//all success
cleanup:
if(NULL != pLoc)
{
pLoc->Release();
pLoc = NULL;
}
if(NULL != pServices)
{
pServices->Release();
pServices = NULL;
}
(VOID)CoUninitialize();
return hr;}
回答 2
Stack Overflow用户
发布于 2015-05-20 05:03:55
从那以后我就知道问题出在哪里了。方法调用是在类(而不是实例)上进行的。
Stack Overflow用户
发布于 2020-02-03 10:33:54
此代码将正常工作：
IEnumWbemClassObject * enum_obj;
hres = pSvc>CreateInstanceEnum(_bstr_t(L"SoftwareLicensingService"),WBEM_FLAG_RETURN_IMMEDIATELY , NULL ,&enum_obj);
IWbemClassObject * spInstance;
ULONG uNumOfInstances = 0;
hres = enum_obj->Next(10000, 1,&spInstance,&uNumOfInstances);
VARIANT path;
hres = spInstance->Get(_bstr_t("__Path"), 0,&path, 0, 0);
IWbemClassObject *results = NULL;
hres = pSvc->ExecMethod( path.bstrVal, _bstr_t( L"InstallProductKey" ), 0,
NULL,NULL,&results, NULL );这段代码不仅适用于该类，也适用于任何类，您可以获得objectPath(ExecMethod()的第一个参数)，并使用所述的it.This代码调用不带参数的方法。
使用参数调用方法的代码在某些情况下是可用的这里.In，使用方法的输入参数调用ExecMethod返回WBEM_E_INVALID_METHOD_PARAMETERS错误。在这种情况下，您可以首先获得对象路径，然后调用GetObejct和GetMethod函数。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/30221837
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