本文整理汇总了C++中IErrorInfo::QueryInterface方法的典型用法代码示例。如果您正苦于以下问题：C++ IErrorInfo::QueryInterface方法的具体用法？C++ IErrorInfo::QueryInterface怎么用？C++ IErrorInfo::QueryInterface使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类IErrorInfo的用法示例。
在下文中一共展示了IErrorInfo::QueryInterface方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: GetErrorRecords
////////////////////////////////////////////////////////////////////////
// HRESULT GetErrorRecords
//
// Get the error message generated by an OLE DB object
/////////////////////////////////////////////////////////////////////////////
HRESULT GetErrorRecords(ULONG* pcRecords, IErrorRecords** ppIErrorRecords)
{
ASSERT(pcRecords && ppIErrorRecords);
HRESULT hr;
//NULL output params
*pcRecords = 0;
*ppIErrorRecords = NULL;
ISupportErrorInfo* pISupportErrorInfo = NULL;
IErrorInfo* pIErrorInfo = NULL;
//See if this interface supports ErrorInfo
//If not there is no reason to display any error
if((hr = GetErrorInfo(0, &pIErrorInfo))==S_OK && pIErrorInfo)
{
//IErrorRecords may not be supported on the existing error object.
//Some other things could have posted an error object (VB) for example...
QTESTC(hr = pIErrorInfo->QueryInterface(IID_IErrorRecords, (void**)ppIErrorRecords));
XTESTC(hr = (*ppIErrorRecords)->GetRecordCount(pcRecords));
}
CLEANUP:
SAFE_RELEASE(pISupportErrorInfo);
SAFE_RELEASE(pIErrorInfo);
return hr;
}示例2: SqlGetErrorInfo
/********************************************************************
SqlGetErrorInfo - gets error information from the last SQL function call
NOTE: pbstrErrorSource and pbstrErrorDescription are optional
********************************************************************/
extern "C" HRESULT DAPI SqlGetErrorInfo(
__in IUnknown* pObjectWithError,
__in REFIID IID_InterfaceWithError,
__in DWORD dwLocaleId,
__out_opt BSTR* pbstrErrorSource,
__out_opt BSTR* pbstrErrorDescription
)
{
HRESULT hr = S_OK;
Assert(pObjectWithError);
// interfaces needed to extract error information out
ISupportErrorInfo* pISupportErrorInfo = NULL;
IErrorInfo* pIErrorInfoAll = NULL;
IErrorRecords* pIErrorRecords = NULL;
IErrorInfo* pIErrorInfoRecord = NULL;
// only ask for error information if the interface supports it.
hr = pObjectWithError->QueryInterface(IID_ISupportErrorInfo,(void**)&pISupportErrorInfo);
ExitOnFailure(hr, "No error information was found for object.");
hr = pISupportErrorInfo->InterfaceSupportsErrorInfo(IID_InterfaceWithError);
ExitOnFailure(hr, "InterfaceWithError is not supported for object with error");
// ignore the return of GetErrorInfo it can succeed and return a NULL pointer in pIErrorInfoAll anyway
hr = ::GetErrorInfo(0, &pIErrorInfoAll);
ExitOnFailure(hr, "failed to get error info");
if (S_OK == hr && pIErrorInfoAll)
{
// see if it's a valid OLE DB IErrorInfo interface that exposes a list of records
hr = pIErrorInfoAll->QueryInterface(IID_IErrorRecords, (void**)&pIErrorRecords);
if (SUCCEEDED(hr))
{
ULONG cErrors = 0;
pIErrorRecords->GetRecordCount(&cErrors);
// get the error information for each record
for (ULONG i = 0; i < cErrors; ++i)
{
hr = pIErrorRecords->GetErrorInfo(i, dwLocaleId, &pIErrorInfoRecord);
if (SUCCEEDED(hr))
{
if (pbstrErrorSource)
{
pIErrorInfoRecord->GetSource(pbstrErrorSource);
}
if (pbstrErrorDescription)
{
pIErrorInfoRecord->GetDescription(pbstrErrorDescription);
}
ReleaseNullObject(pIErrorInfoRecord);
break; // TODO: return more than one error in the future!
}
}
ReleaseNullObject(pIErrorRecords);
}
else // we have a simple error record
{
if (pbstrErrorSource)
{
pIErrorInfoAll->GetSource(pbstrErrorSource);
}
if (pbstrErrorDescription)
{
pIErrorInfoAll->GetDescription(pbstrErrorDescription);
}
}
}
else
{
hr = E_NOMOREITEMS;
}
LExit:
ReleaseObject(pIErrorInfoRecord);
ReleaseObject(pIErrorRecords);
ReleaseObject(pIErrorInfoAll);
ReleaseObject(pISupportErrorInfo);
return hr;
}示例3: GetExcepAndErrorInfo
// Info: Gets both unrestricted and restricted error info
// Parameters: scriptContext - the script context
// pexcepinfo - the exception info of the error (unrestricted)
// proerrstr - the winrt specific error strings (restricted)
// pperrinfo - the IErrorInfo object
// Returns: Failed HRESULT - if GetErrorInfo or QI fail
// Success - otherwise
HRESULT JavascriptErrorDebug::GetExcepAndErrorInfo(ScriptContext* scriptContext, HRESULT hrReturned, EXCEPINFO *pexcepinfo, RestrictedErrorStrings * proerrstr, IErrorInfo ** pperrinfo)
{
HRESULT hr;
HRESULT hrResult;
bool errorInfoMatch = false;
memset(pexcepinfo, 0, sizeof(*pexcepinfo));
memset(proerrstr, 0, sizeof(*proerrstr));
*pperrinfo = nullptr;
// GetErrorInfo returns S_FALSE if there is no rich error info
// and S_OK if there is.
IErrorInfo * perrinfo;
if(NOERROR != (hr = GetErrorInfo(0L, &perrinfo)))
{
return hr;
}
// Fill Exception info
perrinfo->GetSource(&pexcepinfo->bstrSource);
perrinfo->GetDescription(&pexcepinfo->bstrDescription);
perrinfo->GetHelpFile(&pexcepinfo->bstrHelpFile);
perrinfo->GetHelpContext(&pexcepinfo->dwHelpContext);
// Initialize restricted strings
proerrstr->restrictedErrStr = nullptr;
proerrstr->referenceStr = nullptr;
proerrstr->capabilitySid = nullptr;
BSTR bstrErr = nullptr;
BSTR bstrRestrictedErr = nullptr;
BSTR bstrCapabilitySid = nullptr;
BSTR bstrReference = nullptr;
IRestrictedErrorInfo * pROErrorInfo = nullptr;
_Exception * pCLRException = nullptr;
hr = perrinfo->QueryInterface(__uuidof(IRestrictedErrorInfo), reinterpret_cast<void**>(&pROErrorInfo));
if (SUCCEEDED(hr))
{
// Get restricted error strings from IRestrictedErrorInfo
HRESULT hrErr = S_OK;
hrResult = pROErrorInfo->GetErrorDetails(&bstrErr, &hrErr, &bstrRestrictedErr, &bstrCapabilitySid);
if (SUCCEEDED(hrResult))
{
errorInfoMatch = (hrErr == hrReturned);
if (errorInfoMatch)
{
if (nullptr != bstrRestrictedErr)
{
proerrstr->restrictedErrStr = bstrRestrictedErr;
bstrRestrictedErr = nullptr;
}
if (nullptr != bstrCapabilitySid)
{
proerrstr->capabilitySid = bstrCapabilitySid;
bstrCapabilitySid = nullptr;
}
}
}
hrResult = pROErrorInfo->GetReference(&bstrReference);
if (SUCCEEDED(hrResult) && errorInfoMatch)
{
if (nullptr != bstrReference)
{
proerrstr->referenceStr = bstrReference;
bstrReference = nullptr;
}
}
}
else
{
hr = perrinfo->QueryInterface(__uuidof(_Exception), reinterpret_cast<void**>(&pCLRException));
if(FAILED(hr))
{
perrinfo->Release();
return hr;
}
hrResult = pCLRException->get_Message(&bstrRestrictedErr);
if (SUCCEEDED(hrResult))
{
errorInfoMatch = true;
if (nullptr != bstrRestrictedErr)
{
proerrstr->restrictedErrStr = bstrRestrictedErr;
bstrRestrictedErr = nullptr;
}
}
}
if (nullptr != bstrErr)
{
SysFreeString(bstrErr);
bstrErr = nullptr;
}
if (nullptr != bstrRestrictedErr)
//.........这里部分代码省略.........
示例4: PrintError
//***************************************************************************
// Function: PrintError
// Purpose: Formats and prints the error message
//***************************************************************************
void PrintError(char *pszFailureReason, SCODE psc, DWORD dwMode)
{
VARIANT varString;
SCODE sc;
IWbemClassObject *pErrorObject = NULL;
IErrorInfo* pEI = NULL;
fprintf(stdout, "%s\n", pszFailureReason);
fprintf(stdout, "FunctionReturn: %S(0x%08lx)\n", WbemErrorString(psc), psc);
if (GetErrorInfo(0, &pEI) == S_OK)
{
pEI->QueryInterface(IID_IWbemClassObject, (void**)&pErrorObject);
pEI->Release();
}
if (pErrorObject != NULL)
{
VariantInit(&varString);
if (dwMode == ERROR_MODE_PRINTFIELDS)
{
if (pErrorObject->InheritsFrom(L"__NotifyStatus") != WBEM_NO_ERROR)
{
fprintf(stdout, "Unrecognized Error Object type\n");
}
else if (pErrorObject->InheritsFrom(L"__ExtendedStatus") == WBEM_NO_ERROR)
{
sc = pErrorObject->Get(L"Description", 0L, &varString, NULL, NULL);
if (sc != S_OK)
{
fprintf(stdout, "Can't get Description: %d\n", sc);
}
else if (V_VT(&varString) == VT_BSTR)
{
FWPRINTF(stdout, L"Description: %wS\n", V_BSTR(&varString));
}
VariantClear(&varString);
pErrorObject->Get(L"Operation", 0L, &varString, NULL, NULL);
if (sc != S_OK)
{
fprintf(stdout, "Can't get Operation: %d\n", sc);
}
else if (V_VT(&varString) == VT_BSTR)
{
FWPRINTF(stdout, L"Operation: %wS\n", V_BSTR(&varString));
}
VariantClear(&varString);
pErrorObject->Get(L"ParameterInfo", 0L, &varString, NULL, NULL);
if (sc != S_OK)
{
fprintf(stdout, "Can't get ParameterInfo: %d\n", sc);
}
else if (V_VT(&varString) == VT_BSTR)
{
FWPRINTF(stdout, L"ParameterInfo: %wS\n", V_BSTR(&varString));
}
VariantClear(&varString);
pErrorObject->Get(L"ProviderName", 0L, &varString, NULL, NULL);
if (sc != S_OK)
{
fprintf(stdout, "Can't get ProviderName: %d\n", sc);
}
else if (V_VT(&varString) == VT_BSTR)
{
FWPRINTF(stdout, L"ProviderName: %wS\n", V_BSTR(&varString));
}
VariantClear(&varString);
}
}
else
{
BSTR bstrObjectText = NULL;
if (SUCCEEDED(pErrorObject->GetObjectText(0, &bstrObjectText)))
{
fprintf(stdout, "%wS", bstrObjectText);
SysFreeString(bstrObjectText);
}
}
RELEASE(pErrorObject);
}
}示例5: GetErrorsMessage
//Changed from
//ms-help://MS.SSC.v35/MS.SSC.v35.EN/ssctechref/html/a25fafe1-e90a-4545-8836-749dd44135c0.htm
CString SqlCeHelper::GetErrorsMessage()
{
static CString sErrIErrorInfo = L"IErrorInfo interface";
static CString sErrIErrorRecords = L"IErrorRecords interface";
static CString sErrRecordCount = L"error record count";
static CString sErrInfo = L"ERRORINFO structure";
static CString sErrStandardInfo = L"standard error info";
static CString sErrDescription = L"standard error description";
static CString sErrNoSource = L"error source";
HRESULT hr = S_OK;
IErrorInfo *pIErrorInfo = NULL;
IErrorRecords *pIErrorRecords = NULL;
ERRORINFO errorInfo = { 0 };
IErrorInfo *pIErrorInfoRecord = NULL;
CString message = L"";
char str[255];
try
{
// This interface supports returning error information.
// Get the error object from the system for the current
// thread.
hr = GetErrorInfo(0, &pIErrorInfo);
if ( hr == S_FALSE )
{
message = "No error occured.";
return message;
}
if(FAILED(hr) || NULL == pIErrorInfo)
throw sErrIErrorInfo;
// The error records are retrieved from the IIErrorRecords
// interface, which can be obtained from the IErrorInfo
// interface.
hr = pIErrorInfo->QueryInterface(IID_IErrorRecords,
(void **) &pIErrorRecords);
if ( FAILED(hr) || NULL == pIErrorRecords )
throw sErrIErrorRecords;
// The IErrorInfo interface is no longer required because
// we have the IErrorRecords interface, relase it.
pIErrorInfo->Release();
pIErrorInfo = NULL;
ULONG ulNumErrorRecs = 0;
// Determine the number of records in this error object
hr = pIErrorRecords->GetRecordCount(&ulNumErrorRecs);
if ( FAILED(hr) )
throw sErrRecordCount;
// Loop over each error record in the error object to display
// information about each error. Errors are returned.
for (DWORD dwErrorIndex = 0;
dwErrorIndex < ulNumErrorRecs;
dwErrorIndex++)
{
// Retrieve basic error information for this error.
hr = pIErrorRecords->GetBasicErrorInfo(dwErrorIndex,
&errorInfo);
if ( FAILED(hr) )
throw sErrInfo;
TCHAR szCLSID[64] = { 0 };
TCHAR szIID[64] = { 0 };
TCHAR szDISPID[64] = { 0 };
StringFromGUID2(errorInfo.clsid, (LPOLESTR)szCLSID,
sizeof(szCLSID));
StringFromGUID2(errorInfo.iid, (LPOLESTR)szIID,
sizeof(szIID));
sprintf(str, "HRESULT = %lx\n", errorInfo.hrError);
message += str;
sprintf(str, "clsid = %S\n", szCLSID);
message += str;
sprintf(str, "iid = %S\n", szIID);
message += str;
sprintf(str, "dispid = %ld\n", errorInfo.dispid);
message += str;
sprintf(str, "Native Error Code = %lx\n", errorInfo.dwMinor);
message += str;
// Retrieve standard error information for this error.
hr = pIErrorRecords->GetErrorInfo(dwErrorIndex, NULL,
&pIErrorInfoRecord);
if ( FAILED(hr) )
throw sErrStandardInfo;
BSTR bstrDescriptionOfError;
BSTR bstrSourceOfError;
// Get the description of the error.
hr = pIErrorInfoRecord->GetDescription(
//.........这里部分代码省略.........
示例6: GetErrorInfo
////////////////////////////////////////////////////////////////////////
// myHandleResult
//
// This function is called as part of the XCHECK_HR macro; it takes a
// HRESULT, which is returned by the method called in the XCHECK_HR
// macro, and the file and line number where the method call was made.
// If the method call failed, this function attempts to get and display
// the extended error information for the call from the IErrorInfo,
// IErrorRecords, and ISQLErrorInfo interfaces.
//
////////////////////////////////////////////////////////////////////////
HRESULT myHandleResult
(
HRESULT hrReturned,
LPCWSTR pwszFile,
ULONG ulLine
)
{
HRESULT hr;
IErrorInfo * pIErrorInfo = NULL;
IErrorRecords * pIErrorRecords = NULL;
ULONG cRecords;
ULONG iErr;
// If the method called as part of the XCHECK_HR macro failed,
// we will attempt to get extended error information for the call
if( FAILED(hrReturned) )
{
// Obtain the current Error object, if any, by using the
// OLE Automation GetErrorInfo function, which will give
// us back an IErrorInfo interface pointer if successful
hr = GetErrorInfo(0, &pIErrorInfo);
// We've got the IErrorInfo interface pointer on the Error object
if( SUCCEEDED(hr) && pIErrorInfo )
{
// OLE DB extends the OLE Automation error model by allowing
// Error objects to support the IErrorRecords interface; this
// interface can expose information on multiple errors.
hr = pIErrorInfo->QueryInterface(IID_IErrorRecords,
(void**)&pIErrorRecords);
if( SUCCEEDED(hr) )
{
// Get the count of error records from the object
CHECK_HR(hr = pIErrorRecords->GetRecordCount(&cRecords));
// Loop through the set of error records and
// display the error information for each one
for( iErr = 0; iErr < cRecords; iErr++ )
{
myDisplayErrorRecord(hrReturned, iErr, pIErrorRecords,
pwszFile, ulLine);
}
}
// The object didn't support IErrorRecords; display
// the error information for this single error
else
{
myDisplayErrorInfo(hrReturned, pIErrorInfo, pwszFile, ulLine);
}
}
// There was no Error object, so just display the HRESULT to the user
else
{
wprintf(L"\nNo Error Info posted; HResult: 0x%08x\n"
L"File: %s, Line: %d\n", hrReturned, pwszFile, ulLine);
}
}
CLEANUP:
if( pIErrorInfo )
pIErrorInfo->Release();
if( pIErrorRecords )
pIErrorRecords->Release();
return hrReturned;
}