rwaccessdlg.cpp

R/W with DB [代码性质] VC完整应用程序代码 [代码作者] 徐景周

	CPen pen(PS_SOLID,2,RGB(50,100,255));
	CPen open(PS_SOLID,1,RGB(50,100,255));
	CPen oopen(PS_SOLID,1,RGB(0,30,150));
	CPen *pOldPen = pDC->SelectObject(&oopen);
	pDC->PolyBezier(oopoints1,4);
	pDC->PolyBezier(oopoints2,4);
	pDC->SelectObject(&open);
	pDC->PolyBezier(opoints1,4);
	pDC->PolyBezier(opoints2,4);
	pDC->SelectObject(&pen);
	pDC->PolyBezier(points1,4);
	pDC->PolyBezier(points2,4);
	pDC->SelectObject(&wpen);
	pDC->PolyBezier(points1,4);
	pDC->PolyBezier(points2,4);
	pDC->SelectObject(pOldPen);

	oon1 = on1;
	oon2 = on2;
	on1 = n1;
	on2 = n2;
}

/////////////////////////////////////////////////////////////////////////////
// CRWAccessDlg dialog

CRWAccessDlg::CRWAccessDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CRWAccessDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CRWAccessDlg)
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CRWAccessDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CRWAccessDlg)
	DDX_Control(pDX, IDC_LISTACCESS, m_AccessList);
	DDX_Control(pDX, IDOK, m_OK);
	DDX_Control(pDX, IDC_WRITEACCESS, m_WriteAccess);
	DDX_Control(pDX, IDC_READACCESS, m_ReadAccess);
	DDX_Control(pDX, IDC_ABOUT, m_About);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CRWAccessDlg, CDialog)
	//{{AFX_MSG_MAP(CRWAccessDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_WRITEACCESS, OnWriteAccess)
	ON_BN_CLICKED(IDC_READACCESS, OnReadAccess)
	ON_BN_CLICKED(IDC_ABOUT, OnAbout)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CRWAccessDlg message handlers
//////////////////////////////////////////////////////////////////////////////
//名称：OnInitDialog
//功能：初始化对话框
//作者：徐景周([e-mail])
//组织：未来工作室(Future Studio)
//日期：2002.9.26
/////////////////////////////////////////////////////////////////////////////
BOOL CRWAccessDlg::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

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CRWAccessDlg::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 CRWAccessDlg::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 CRWAccessDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

//////////////////////////////////////////////////////////////////////////////
//名称：OnWriteAccess
//功能：创建并写入数据到Access文件中
//作者：徐景周([e-mail])
//组织：未来工作室(Future Studio)
//日期：2002.9.26
/////////////////////////////////////////////////////////////////////////////
void CRWAccessDlg::OnWriteAccess() 
{
	//获取主程序所在路径,存在sPath中
	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";
	
	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 ('徐景周',26)");
		
		//加入第二个记录，用DAO涵数
		RecSet.AddNew();
		RecSet.SetFieldValue("Name","徐志慧");
		RecSet.SetFieldValue("Age","21");
		RecSet.Update();
		
		//加入第三个记录，用DAO涵数
		RecSet.AddNew();
		RecSet.SetFieldValue("Name","郭徽");
		RecSet.SetFieldValue("Age","27");
		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！");
	
}

//////////////////////////////////////////////////////////////////////////////
//名称：OnReadAccess
//功能：从Access文件中读取相应数据并显示出来
//作者：徐景周([e-mail])
//组织：未来工作室(Future Studio)
//日期：2002.9.26
/////////////////////////////////////////////////////////////////////////////
void CRWAccessDlg::OnReadAccess() 
{
	COleVariant var;		// 字段类型
	var.ChangeType(VT_BSTR, NULL);
	CString strName,strAge,strFile; 

	//清空列表框
	m_AccessList.ResetContent();

	//获取主程序所在路径,存在sPath中
	CString sPath;
	GetModuleFileName(NULL,sPath.GetBufferSetLength (MAX_PATH+1),MAX_PATH);
	sPath.ReleaseBuffer ();
    int nPos;
	nPos=sPath.ReverseFind ('\\');
	sPath=sPath.Left (nPos);

	strFile = sPath + "\\demo.mdb";
	db.Open(strFile);		// 打开已创建的demo数据库及DamoTable表
	RecSet.Open(AFX_DAO_USE_DEFAULT_TYPE,"SELECT * FROM DemoTable",NULL);

	while(!RecSet.IsEOF())	// 有没有到表结尾
	{
		RecSet.GetFieldValue("Name",var);
		strName = (LPCSTR)var.pbstrVal;
		RecSet.GetFieldValue("Age",var);
		strAge = (LPCSTR)var.pbstrVal;
		m_AccessList.AddString( strName + " --> "+strAge );

		RecSet.MoveNext();
	}

	//关闭记录集及库
	RecSet.Close();
	db.Close();
}

//////////////////////////////////////////////////////////////////////////////
//名称：OnAbout
//功能：弹出"关于"对话框
//作者：徐景周([e-mail])
//组织：未来工作室(Future Studio)
//日期：2002.9.26
/////////////////////////////////////////////////////////////////////////////
void CRWAccessDlg::OnAbout() 
{
	CAboutDlg AboutDlg;

	AboutDlg.DoModal();	
}

//////////////////////////////////////////////////////////////////////////////
//名称：OnOK
//功能：退出程序时处理
//作者：徐景周([e-mail])
//组织：未来工作室(Future Studio)
//日期：2002.9.26
/////////////////////////////////////////////////////////////////////////////
void CRWAccessDlg::OnOK() 
{
	CWindowAnima wa(this);
	
	//将窗体分为6块动画窗体效果
	wa.Scatter6(90,10);
	
	CDialog::OnOK();
}