lyfz_repos/经典版源码/AdoImpl/ADODatabase.cpp

#include "StdAfx.h"
#include "ADODatabase.h"


BOOL CADODatabase::Execute(LPCTSTR lpstrExec)
{
	ASSERT(m_pConnection != NULL);
	ASSERT(_tcscmp(lpstrExec, _T("")) != 0);
	_variant_t vRecords;
	m_nRecordsAffected = 0;

	try
	{
		m_pConnection->CursorLocation = adUseClient;
		m_pConnection->Execute(_bstr_t(lpstrExec), &vRecords, adExecuteNoRecords);
		m_nRecordsAffected = vRecords.iVal;
		return TRUE;
	}
	catch(_com_error &e)
	{
		dump_com_error(e);
		return FALSE;	
	}
}

DWORD CADODatabase::GetRecordCount(_RecordsetPtr m_pRs)
{
	DWORD numRows = 0;

	numRows = m_pRs->GetRecordCount();

	if(numRows == -1)
	{
		if(m_pRs->EndOfFile != VARIANT_TRUE)
			m_pRs->MoveFirst();

		while(m_pRs->EndOfFile != VARIANT_TRUE)
		{
			numRows++;
			m_pRs->MoveNext();
		}
		if(numRows > 0)
			m_pRs->MoveFirst();
	}
	return numRows;
}

BOOL CADODatabase::Open(LPCTSTR lpstrConnection, LPCTSTR lpstrUserID, LPCTSTR lpstrPassword)
{
	HRESULT hr = S_OK;

	if(IsOpen())
		Close();

	if(_tcscmp(lpstrConnection, _T("")) != 0)
		m_strConnection = lpstrConnection;

	ASSERT(!m_strConnection.IsEmpty());

	try
	{
		if (m_nConnectionTimeout != 0)
			m_pConnection->PutConnectionTimeout(m_nConnectionTimeout);
		hr = m_pConnection->Open(_bstr_t(m_strConnection), _bstr_t(lpstrUserID), _bstr_t(lpstrPassword), NULL);

		return hr == S_OK;
	}
	catch(_com_error &e)
	{
		dump_com_error(e);
		return FALSE;
	}
}

void CADODatabase::dump_com_error(_com_error &e)
{
	CString ErrorStr;
	_bstr_t bstrSource(e.Source());
	_bstr_t bstrDescription(e.Description());
	ErrorStr.Format(_T("CADODataBase Error\n\tCode = %08lx\n\tCode meaning = %s\n\tSource = %s\n\tDescription = %s\n"),
		e.Error(), e.ErrorMessage(), (TCHAR*)bstrSource, (TCHAR*)bstrDescription );
	m_strErrorDescription = (LPCSTR)bstrDescription ;
	m_strLastError = _T("Connection String = " + GetConnectionString() + '\n' + ErrorStr);
	m_dwLastError = e.Error(); 
#ifdef _DEBUG
	AfxMessageBox( ErrorStr, MB_OK | MB_ICONERROR );
#endif	
}

BOOL CADODatabase::IsOpen()
{
	if(m_pConnection )
		return m_pConnection->GetState() != adStateClosed;
	return FALSE;
}

void CADODatabase::Close()
{
	if(IsOpen())
		m_pConnection->Close();
}