beamdatamanager.cpp

实用的VC平台的ADO数据库编程

// BeamDataManager.cpp : Defines the class behaviors for the application.
//version 0.20

#include "stdafx.h"
#include "BeamDataManager.h"

#include "MainFrm.h"
#include "BeamDataManagerDoc.h"
#include "BeamDataManagerView.h"
#include "DrawDataView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CBeamDataManagerApp

BEGIN_MESSAGE_MAP(CBeamDataManagerApp, CWinApp)
	//{{AFX_MSG_MAP(CBeamDataManagerApp)
	ON_COMMAND(ID_APP_ABOUT, OnAppAbout)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
	// Standard file based document commands
	ON_COMMAND(ID_FILE_NEW, CWinApp::OnFileNew)
	ON_COMMAND(ID_FILE_OPEN, CWinApp::OnFileOpen)
	// Standard print setup command
	ON_COMMAND(ID_FILE_PRINT_SETUP, CWinApp::OnFilePrintSetup)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CBeamDataManagerApp construction

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

/////////////////////////////////////////////////////////////////////////////
// The one and only CBeamDataManagerApp object

CBeamDataManagerApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CBeamDataManagerApp initialization

BOOL CBeamDataManagerApp::InitInstance()
{
	AfxOleInit();//初始化COM库
	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

	//以下是连接access2000数据库。。。
	HRESULT hr;
	try
	{
		hr = m_pConnection.CreateInstance("ADODB.Connection");///创建Connection对象
		if(SUCCEEDED(hr))
		{
			
			m_pConnection->ConnectionTimeout=3;///设置超时时间为3秒
			hr = m_pConnection->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=MyData.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 temp;
		temp.Format("连接数据库错误信息:%s",e.ErrorMessage());
		::MessageBox(NULL,temp,"提示信息",NULL);
		return false;
	}

	// Change the registry key under which our settings are stored.
	// TODO: You should modify this string to be something appropriate
	// such as the name of your company or organization.
	SetRegistryKey(_T("Local AppWizard-Generated Applications"));

	LoadStdProfileSettings();  // Load standard INI file options (including MRU)

	// Register the application's document templates.  Document templates
	//  serve as the connection between documents, frame windows and views.

	CSingleDocTemplate* pDocTemplate;
	pDocTemplate = new CSingleDocTemplate(
		IDR_MAINFRAME,
		RUNTIME_CLASS(CBeamDataManagerDoc),
		RUNTIME_CLASS(CMainFrame),       // main SDI frame window
//		RUNTIME_CLASS(CBeamDataManagerView));
		RUNTIME_CLASS(CDrawDataView));
	AddDocTemplate(pDocTemplate);

	// Parse command line for standard shell commands, DDE, file open
	CCommandLineInfo cmdInfo;
	ParseCommandLine(cmdInfo);

	if (cmdInfo.m_bRunEmbedded || cmdInfo.m_bRunAutomated)
	{
		return TRUE;
	}

	// Dispatch commands specified on the command line
	if (!ProcessShellCommand(cmdInfo))
		return FALSE;

	// The one and only window has been initialized, so show and update it.
	m_pMainWnd->ShowWindow(SW_MAXIMIZE);
	m_pMainWnd->UpdateWindow();

	return TRUE;
}

int CBeamDataManagerApp::ExitInstance() 
{
	if(m_pConnection->State)
		m_pConnection->Close(); ///如果已经打开了连接则关闭它
	m_pConnection.Release();

	return CWinApp::ExitInstance();
}

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
		// No message handlers
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

// App command to run the dialog
void CBeamDataManagerApp::OnAppAbout()
{
	CAboutDlg aboutDlg;
	aboutDlg.DoModal();
}

/////////////////////////////////////////////////////////////////////////////
// CBeamDataManagerApp message handlers