adoconn.cpp

一个在线考试系统的代码。功能包括考试科目管理

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

#include "stdafx.h"
#include "ExmOnline.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::OnInitADOConn()
{
	try
	{
		m_pConnection.CreateInstance("ADODB.Connection");
		_bstr_t strConnect="Provider=sqloledb;Data Source=10.68.71.200;Initial Catalog=ExmOnline;User Id=sa;Password=51583302;";
		m_pConnection->Open(strConnect,"","",adModeUnknown);
	}
	catch (_com_error e)
	{
		AfxMessageBox(e.Description());
	}
}

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

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

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