www.pudn.com > 14751_AdoRWAccess.rar > AdoRWAccess.cpp

////////////////////////////////////////////////////////////////////////////// 
//类名：CAdoRWAccessApp 
//功能：应用程序的初始化 
//作者：徐景周(jingzhou_xu@163.net) 
//组织：未来工作室(Future Studio) 
//日期：2002.12.10 
///////////////////////////////////////////////////////////////////////////// 
#include "stdafx.h" 
#include "AdoRWAccess.h" 
#include "AdoRWAccessDlg.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CAdoRWAccessApp 
 
BEGIN_MESSAGE_MAP(CAdoRWAccessApp, CWinApp) 
	//{{AFX_MSG_MAP(CAdoRWAccessApp) 
		// 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() 
 
///////////////////////////////////////////////////////////////////////////// 
// CAdoRWAccessApp construction 
 
CAdoRWAccessApp::CAdoRWAccessApp() 
{ 
	// TODO: add construction code here, 
	// Place all significant initialization in InitInstance 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// The one and only CAdoRWAccessApp object 
 
CAdoRWAccessApp theApp; 
 
///////////////////////////////////////////////////////////////////////////// 
////////////////////////////////////////////////////////////////////////////// 
//名称：InitInstance 
//功能：初始化程序实例 
//作者：徐景周(jingzhou_xu@163.net) 
//组织：未来工作室(Future Studio) 
//日期：2002.12.10 
///////////////////////////////////////////////////////////////////////////// 
BOOL CAdoRWAccessApp::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 
 
	// 此程序只能运行一次，用互斥量来判断程序是否已运行 
    HANDLE m_hMutex=CreateMutex(NULL,TRUE, m_pszAppName);  
    if(GetLastError()==ERROR_ALREADY_EXISTS) { return FALSE; } 
 
	// 设置对话框背景和文本颜色 
//	SetDialogBkColor(RGB(160,180,220),RGB(0,0,0)); 
 
	// ------------------------------------------------------------------------------------------------ 
	// 初始化COM,创建ADO连接等操作 
	AfxOleInit(); 
	m_pConnection.CreateInstance(__uuidof(Connection)); 
 
	// 在ADO操作中建议语句中要常用try...catch()来捕获错误信息， 
	// 因为它有时会经常出现一些想不到的错误。jingzhou xu 
	try                  
	{	 
		// 打开本地Access库Demo.mdb 
		m_pConnection->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Demo.mdb","","",adModeUnknown); 
		 
	} 
	catch(_com_error e) 
	{ 
		AfxMessageBox("数据库连接失败，确认数据库Demo.mdb是否在当前路径下!"); 
		return FALSE; 
	}  
	// --------------------------------------------------------------------------------------------------- 
 
	CAdoRWAccessDlg 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; 
} 
 
////////////////////////////////////////////////////////////////////////////// 
//名称：ExitInstance 
//功能：退出时清除工作 
//作者：徐景周(jingzhou_xu@163.net) 
//组织：未来工作室(Future Studio) 
//日期：2002.12.10 
///////////////////////////////////////////////////////////////////////////// 
int CAdoRWAccessApp::ExitInstance()  
{ 
	// 关闭ADO连接状态 
	if(m_pConnection->State) 
		m_pConnection->Close(); 
	m_pConnection= NULL; 
 
	return CWinApp::ExitInstance(); 
}