adoconn.cpp

VC6.0访问SQL Server数据库的库函数文件

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

#include "stdafx.h"
#include "HrSys.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::OnInitDBConnec ()
{
	::CoInitialize(NULL);
	try
	{
		m_pConnection.CreateInstance ("ADODB.Connection");
		_bstr_t strConnect="Provider=SQLOLEDB;Server=.;Database=HrSys;uid=sa;pwd=";
		m_pConnection->Open (strConnect,"","",adModeUnknown);
	}
	catch (_com_error e)
	{
		AfxMessageBox (e.Description ());
	}
}

_RecordsetPtr & ADOConn::GetRecordSet (_bstr_t bstrSQL)
{
	try
	{
		if (m_pConnection==NULL)
		{
			OnInitDBConnec ();
		}
		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)
		{
			OnInitDBConnec ();
		}
		m_pConnection->Execute (bstrSQL,NULL,adCmdText);
		return true;
	}
	catch (_com_error e)
	{
		AfxMessageBox (e.Description ());
		return false;
	}
}

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