adoconn.cpp

一个自己修改了一下的数据库类

// ADOConn.cpp: implementation of the ADOConn class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "MainDlg.h"
#include "ADOConn.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

ADOConn::ADOConn()
{

}

ADOConn::~ADOConn()
{

}

void ADOConn::InitADOconn()
{
	::CoInitialize(NULL);
	try
	{
		m_pConnection.CreateInstance("ADODB.Connection");
		m_pConnection->Open((_bstr_t)m_strConn,"","",adModeUnknown);
	}
	catch(_com_error e)
	{
		AfxMessageBox(e.Description());
	}
}

_RecordsetPtr& ADOConn::GetRecordset(_bstr_t bstrSQL)
{
	try
	{
		if(m_pConnection==NULL)
			InitADOconn();
		m_pRecordset.CreateInstance(__uuidof(Recordset));
		m_pRecordset->Open(bstrSQL,m_pConnection.GetInterfacePtr(),adOpenDynamic,adLockOptimistic,adCmdText);
	}
	catch(_com_error e)
	{
		AfxMessageBox(e.Description());
	}
	return m_pRecordset;
}

BOOL ADOConn::ExecuteSQL(_bstr_t bstrSQL)
{
	try
	{
		if(m_pConnection==NULL)
			InitADOconn();
		m_pConnection->Execute(bstrSQL,NULL,adCmdText);
		return TRUE;
	}
	catch(_com_error e)
	{
		AfxMessageBox(e.Description());
		return FALSE;
	}
}

void ADOConn::CloseRecordset()
{
	if(m_pRecordset!=NULL)
		m_pRecordset->Close();
}

void ADOConn::ExitADOconn()
{
	m_pConnection->Close();
	::CoUninitialize();
}