billsmanager.cpp

用VC++和access数据库开发的账单管理系统

// BillsManager.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "BillsManager.h"
#include "BillsManagerDlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// CBillsManagerApp

BEGIN_MESSAGE_MAP(CBillsManagerApp, CWinApp)
	//{{AFX_MSG_MAP(CBillsManagerApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG
	ON_COMMAND(ID_HELP, CWinApp::OnHelp)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBillsManagerApp construction

CBillsManagerApp::CBillsManagerApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CBillsManagerApp object

CBillsManagerApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CBillsManagerApp initialization

BOOL CBillsManagerApp::InitInstance()
{
	AfxEnableControlContainer();

	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif

	//初始化com环境
	::CoInitialize(NULL);
	//创建连接对象和记录集对象
	HRESULT hr;
	try
	{
		hr = m_pConnection.CreateInstance("ADODB.Connection");//创建Connection对象
		if(SUCCEEDED(hr))
		{
			hr = m_pConnection->Open(
				"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=bills.mdb",
				"","",adModeUnknown);///连接数据库
			///上面一句中连接字串中的Provider是针对ACCESS2000环境的，
			//对于ACCESS97,需要改为:Provider=Microsoft.Jet.OLEDB.3.51
		}
	}
	catch(_com_error e)///捕捉异常
	{
		CString errormessage;
		errormessage.Format("连接数据库失败!\r\n错误信息:%s",e.ErrorMessage());
		AfxMessageBox(errormessage);///显示错误信息
	}
	m_pRecordset.CreateInstance(__uuidof(Recordset));



	CBillsManagerDlg dlg;
	m_pMainWnd = &dlg;
	int nResponse = dlg.DoModal();
	if (nResponse == IDOK)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with OK
	}
	else if (nResponse == IDCANCEL)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with Cancel
	}

	// Since the dialog has been closed, return FALSE so that we exit the
	//  application, rather than start the application's message pump.
	return FALSE;
}

int CBillsManagerApp::ExitInstance() 
{
	m_pConnection->Close();
	//还原com环境
	::CoUninitialize();

	return CWinApp::ExitInstance();
}