usingblob.cpp

能够在数据库中存取大的二进制块

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

#include "stdafx.h"
#include "UsingBlob.h"

#include "MainFrm.h"
#include "ChildFrm.h"
#include "UsingBlobDoc.h"
#include "UsingBlobView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CUsingBlobApp

BEGIN_MESSAGE_MAP(CUsingBlobApp, CWinApp)
	//{{AFX_MSG_MAP(CUsingBlobApp)
	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)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CUsingBlobApp construction

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

/////////////////////////////////////////////////////////////////////////////
// The one and only CUsingBlobApp object

CUsingBlobApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CUsingBlobApp initialization

BOOL CUsingBlobApp::InitInstance()
{

    try
    {
        //Connect to the database
        // NO DSN required!!
        m_DB.Open(NULL,
                  FALSE,
                  FALSE,
                  "ODBC;DRIVER={Microsoft Access Driver (*.mdb)};DBQ=Usingblob.mdb");
    }
    catch(CDBException* pE)
    {
        pE->ReportError();
        pE->Delete();
        return false;
    }

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

	CMultiDocTemplate* pDocTemplate;
	pDocTemplate = new CMultiDocTemplate(
		IDR_USINGBTYPE,
		RUNTIME_CLASS(CUsingBlobDoc),
		RUNTIME_CLASS(CChildFrame), // custom MDI child frame
		RUNTIME_CLASS(CUsingBlobView));
	AddDocTemplate(pDocTemplate);

	// create main MDI Frame window
	CMainFrame* pMainFrame = new CMainFrame;
	if (!pMainFrame->LoadFrame(IDR_MAINFRAME))
		return FALSE;
	m_pMainWnd = pMainFrame;


	// The main window has been initialized, so show and update it.
	pMainFrame->ShowWindow(m_nCmdShow);
	pMainFrame->UpdateWindow();

	return TRUE;
}


/////////////////////////////////////////////////////////////////////////////
// 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 CUsingBlobApp::OnAppAbout()
{
	CAboutDlg aboutDlg;
	aboutDlg.DoModal();
}

/////////////////////////////////////////////////////////////////////////////
// CUsingBlobApp message handlers