daodlg.cpp

DAO数据库简单应用,可以独立创建Access数据库

// DAODlg.cpp : implementation file
//

#include "stdafx.h"
#include "DAO.h"
#include "DAODlg.h"

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

/////////////////////////////////////////////////////////////////////////////
// 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)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CDAODlg dialog

CDAODlg::CDAODlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDAODlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDAODlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CDAODlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDAODlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDAODlg, CDialog)
	//{{AFX_MSG_MAP(CDAODlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDAODlg message handlers

BOOL CDAODlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CDAODlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CDAODlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CDAODlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CDAODlg::OnButton1() 
{
	// TODO: Add your control notification handler code here
   //获取主程序所在路径,存在sPath中
	CDaoRecordset RecSet(&db);
    CString sPath;
    GetModuleFileName(NULL,sPath.GetBufferSetLength (MAX_PATH+1),MAX_PATH);
    sPath.ReleaseBuffer ();
    int nPos;
    nPos=sPath.ReverseFind ('\\');
    sPath=sPath.Left (nPos);

    //默认创建数据名：Demo.mdb，内部表名：DemoTable，表内有二个字段：姓名、年龄
    CString lpszFile = sPath + "\\Demo.mdb";
	MessageBox(lpszFile);
    
    CFileFind  fFind;
    BOOL bSuccess;
    bSuccess=fFind.FindFile(lpszFile);

    fFind.Close ();
    //是否已有创建好的Demo.mdb文件，没有则创建它
    if(!bSuccess)
    {
        db.Create(lpszFile);
		CString SqlCmd = "CREATE TABLE DemoTable(Name VARCHAR(20),Age VARCHAR(3));";
        db.Execute(SqlCmd);
        //打开已创建的数据表
        RecSet.Open(AFX_DAO_USE_DEFAULT_TYPE,
            "SELECT * FROM DemoTable", 0);
        //加入第一个记录，用SQL语句
        db.Execute("INSERT INTO DemoTable (Name,Age) VALUES ('DJ',26)");
        
        //加入第二个记录，用DAO涵数
        RecSet.AddNew();
        RecSet.SetFieldValue("Name","DJ");
        RecSet.SetFieldValue("Age","22");
        RecSet.Update();
        
        //加入第三个记录，用DAO涵数
        RecSet.AddNew();
        RecSet.SetFieldValue("Name","HK");
        RecSet.SetFieldValue("Age","22");
        RecSet.Update();
        
        //关闭记录集及库
        RecSet.Close();
        db.Close();

        AfxMessageBox("Access文件写入成功！");
    }
    else
        AfxMessageBox("Demo.mdb数据库已经创建！");
    
	
	}


void CDAODlg::OnButton2() 
{
	// TODO: Add your control notification handler code here
	CFileFind ffind;
	CString sPath;
	
	BOOL isdel;
    GetModuleFileName(NULL,sPath.GetBufferSetLength (MAX_PATH+1),MAX_PATH);
    sPath.ReleaseBuffer ();
	int i=sPath.ReverseFind('\\');
	sPath=sPath.Left(i);
	sPath=sPath+"\\Demo.mdb";
	MessageBox(sPath);
	CFile file;
//	file.Open(sPath,CFile::modeCreate | CFile::modeWrite);
	isdel=ffind.FindFile(sPath);
	if(isdel)
	{
		file.Remove(sPath);
	}
}

void CDAODlg::OnButton3() 
{
	// TODO: Add your control notification handler code here
	CDaoRecordset RecSet(&db);
	ole.ChangeType(VT_BSTR,0);
    CString str;
    CString sPath;
    GetModuleFileName(NULL,sPath.GetBufferSetLength (MAX_PATH+1),MAX_PATH);
    sPath.ReleaseBuffer ();
    int nPos;
    nPos=sPath.ReverseFind ('\\');
    sPath=sPath.Left (nPos);
    CString lpszFile = sPath + "\\Demo.mdb";
    db.Open(lpszFile);

	RecSet.Open(AFX_DAO_USE_DEFAULT_TYPE,"SELECT * FROM DemoTable",NULL);
	while(!RecSet.IsEOF())
	{
		RecSet.GetFieldValue("Name",ole);
		str = (LPCTSTR)ole.pbstrVal;
		MessageBox(str);
		RecSet.MoveNext();
	}
    
	RecSet.Close();
    db.Close();
}