HRESULT CreateAccessor
(
IRowset* pIRowset,
DBBINDING* rgBind,
DBCOUNTITEM cBind,
HACCESSOR* phAccessor_out
)
{
IAccessor* pIAccessor = NULL;
HACCESSOR hAccessor;
HRESULT hr;
assert(pIRowset != NULL);
assert(rgBind != NULL);
assert(phAccessor_out != NULL);
// Get an accessor for our bindings from the rowset, via IAccessor
hr = pIRowset->QueryInterface( IID_IAccessor, (void**)&pIAccessor );
if (FAILED(hr))
{
DUMP_ERROR_LINENUMBER();
DumpErrorHResult( hr, "pIRowset->QI for IID_IAccessor" );
goto error;
}
hr = pIAccessor->CreateAccessor( DBACCESSOR_ROWDATA, cBind, rgBind, 0,
&hAccessor, NULL );
if (FAILED(hr))
{
DUMP_ERROR_LINENUMBER();
DumpErrorHResult( hr, "pIAccessor->CreateAccessor" );
goto error;
}
pIAccessor->Release();
pIAccessor = NULL;
*phAccessor_out = hAccessor;
return ResultFromScode( S_OK );
error:
if (pIAccessor)
pIAccessor->Release();
*phAccessor_out = NULL;
return ResultFromScode( hr );
}
void CClientDB::GetInventoryData( const char* pszName, std::list<S_InventoryData>& Inventory)
{
ICommandText* pICommandText = NULL;
IRowset* pIRowset = NULL;
HRESULT hr;
ULONG cbColOffset = 0;
LONG cNumRows = 0;
LONG cRowsAffected = 0;
int iCount = 0;
unsigned long cRowsObtained;
unsigned long cCount;
HACCESSOR hAccessor;
IAccessor * pIAccessor = NULL;
WCHAR wCmdString[1024];
wsprintfW(wCmdString, L"SELECT realindex,virtualindex FROM INVENTORY WHERE name = '%S'", pszName );
pICommandText = CreateCommand( m_pIDBInitialize ,wCmdString );
if( pICommandText == NULL )
{
assert( 0 && "Fail GetInventoryData");
return;
}
if(FAILED(hr = pICommandText->Execute(
NULL,
IID_IRowset,
NULL,
&cNumRows,
(IUnknown **) &pIRowset)))
{
assert( 0 && "Fail GetInventoryData : ICommandText->Execute");
pICommandText->Release();
return;
}
if( FAILED( pIRowset->QueryInterface( IID_IAccessor, (void **) &pIAccessor)))
{
assert( 0 && "Fail IRowset->QueryInterface" );
pIRowset->Release();
pICommandText->Release();
return;
}
const int nParams = 2;
S_InventoryData Data;
memset( &Data, 0, sizeof( S_InventoryData ));
static DBBINDING ExactBindings [nParams] = {
{
1, // iOrdinal
offsetof (S_InventoryData, lRealIndex), // obValue
0, // No length binding
0, // No Status binding
NULL, // No TypeInfo
NULL, // No Object
NULL, // No Extensions
DBPART_VALUE,
DBMEMOWNER_CLIENTOWNED, // Ignored
DBPARAMIO_NOTPARAM,
sizeof (long),
0,
DBTYPE_I4,
0, // No Precision
0 // No Scale
},
{
2, // iOrdinal
offsetof (S_InventoryData, lVirtualIndex ), // obValue
0, // No length binding
0, // No Status binding
NULL, // No TypeInfo
NULL, // No Object
NULL, // No Extensions
DBPART_VALUE,
DBMEMOWNER_CLIENTOWNED, // Ignored
DBPARAMIO_NOTPARAM,
sizeof(long),
0,
DBTYPE_I4,
0, // No Precision
0 // No Scale
},
};
if( FAILED( hr = pIAccessor->CreateAccessor(
DBACCESSOR_ROWDATA,
nParams,
ExactBindings,
0,
&hAccessor,
NULL)))
{
pIAccessor->Release();
pIRowset->Release();
pICommandText->Release();
assert( 0 && "Fail CreateAccessor");
return;
// Handle errors here.
}
HROW* pRows = new HROW[256];
while( TRUE )
{
if( FAILED( hr = pIRowset->GetNextRows( NULL, 0, 256, &cRowsObtained, &pRows ) ) )
{
CheckErrorGetNextRows( hr );
break;
// Handle errors here.
}
// Make sure some rows were obtained.
if( cRowsObtained == 0 )
{
LogString(LOG_NORMAL,"ROW IS 0");
break;
}
// Get the data for the each of the rows.
for( cCount = 0; cCount < cRowsObtained; cCount++ )
{
// Get the row data needed.
ZeroMemory( &Data, sizeof( Data ));
if( FAILED( hr = pIRowset->GetData( pRows[cCount], hAccessor, (void*)&Data )))
CheckErrorGetData( hr );
else
Inventory.push_back( Data );
}
// Release the rows.
if( FAILED( hr = pIRowset->ReleaseRows(
cRowsObtained,
pRows,
NULL,
NULL,
NULL )))
{
// Handle errors here.
}
memset( &Data, 0 , sizeof( S_InventoryData ));
}
if( FAILED( hr = pIAccessor->ReleaseAccessor( hAccessor, NULL )))
{
// Handle errors here.
}
// Release the IAccessor object.
if( pRows )
delete []pRows;
pIAccessor->Release();
pIRowset->Release();
pICommandText->Release();
}