dataaccess.cpp

来自「RFID小区车库管理系统。实现车辆的合法性检查和计费管理。」· C++ 代码 · 共 41 行

// DataAccess.cpp: implementation of the CDataAccess class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "CMS.h"
#include "DataAccess.h"

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

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
inline void TESTHR(HRESULT x) {if FAILED(x) _com_issue_error(x);};

CDataAccess::CDataAccess()
{
	m_strConnectionString = "driver={SQL Server};Server=WANYONGCHAO; \
			DATABASE=CMS; UID=sa; PWD=chenlidong;";
	m_pConnection = NULL;
	
	//打开连接
	TESTHR(pConnection.CreateInstance(__uuidof(Connection)));
	HRESULT hr = pConnection->Open(m_strConnectionString,"","",adModeUnknown);
}

CDataAccess::~CDataAccess()
{
	if(m_pConnection)
	{
		if(m_pConnection->State == adStateOpen)
		{
			m_pConnection->Close();
		}
	}
}