ADO_ACCESS.rar_ADO ACCESS_access ado

// AdoCtrlAccessDlg.cpp : implementation file // #include "stdafx.h" #include "AdoCtrlAccess.h" #include "AdoCtrlAccessDlg.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() ///////////////////////////////////////////////////////////////////////////// // CAdoCtrlAccessDlg dialog CAdoCtrlAccessDlg::CAdoCtrlAccessDlg(CWnd* pParent /*=NULL*/) : CDialog(CAdoCtrlAccessDlg::IDD, pParent) { //{{AFX_DATA_INIT(CAdoCtrlAccessDlg) m_nID = 0; m_strName = _T(""); //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CAdoCtrlAccessDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CAdoCtrlAccessDlg) DDX_Text(pDX, IDC_ID, m_nID); DDX_Text(pDX, IDC_NAME, m_strName); //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CAdoCtrlAccessDlg, CDialog) //{{AFX_MSG_MAP(CAdoCtrlAccessDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_PRV, OnPrv) ON_BN_CLICKED(IDC_NEXT, OnNext) ON_BN_CLICKED(IDC_MODIFY, OnModify) ON_WM_DESTROY() //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CAdoCtrlAccessDlg message handlers BOOL CAdoCtrlAccessDlg::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 //初始化环境 ::CoInitialize(NULL); //创建并打开数据库连接对象 _variant_t vFieldValue; CString strFieldValue; m_pCon.CreateInstance(__uuidof(Connection)); m_pCon->Open("students","","",NULL); //创建并打开记录集对象 m_pRs.CreateInstance(__uuidof(Recordset)); m_pRs->Open("select* from table1",m_pCon.GetInterfacePtr(),adOpenDynamic,adLockOptimistic,adCmdText); if(VARIANT_FALSE == m_pRs->EndOfFile) { //获得第一条记录并显示 vFieldValue = m_pRs->GetCollect("id"); strFieldValue = (char*)_bstr_t(vFieldValue); m_nID = atoi(strFieldValue.GetBuffer(0));; vFieldValue.Clear(); vFieldValue = m_pRs->GetCollect("name"); strFieldValue = (char*)_bstr_t(vFieldValue); m_strName = strFieldValue; vFieldValue.Clear(); } UpdateData(FALSE); return TRUE; // return TRUE unless you set the focus to a control } void CAdoCtrlAccessDlg::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 CAdoCtrlAccessDlg::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 CAdoCtrlAccessDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } //前一条记录 void CAdoCtrlAccessDlg::OnPrv() { _variant_t vFieldValue; CString strFieldValue; //记录集指针前移一条 m_pRs->MovePrevious(); if(VARIANT_FALSE == m_pRs->FirstOfFile) { //获得当前条的数据并显示 vFieldValue = m_pRs->GetCollect("id"); strFieldValue = (char*)_bstr_t(vFieldValue); m_nID = atoi(strFieldValue.GetBuffer(0));; vFieldValue.Clear(); vFieldValue = m_pRs->GetCollect("name"); strFieldValue = (char*)_bstr_t(vFieldValue); m_strName = strFieldValue; vFieldValue.Clear(); UpdateData(FALSE); } else { //定位到第一条 m_pRs->MoveNext(); AfxMessageBox("已经到第一条了"); } } //后一条记录 void CAdoCtrlAccessDlg::OnNext() { _variant_t vFieldValue; CString strFieldValue; //记录集指针后移一条 m_pRs->MoveNext(); if(VARIANT_FALSE == m_pRs->EndOfFile) { //获得当前条的数据并显示 vFieldValue = m_pRs->GetCollect("id"); strFieldValue = (char*)_bstr_t(vFieldValue); m_nID = atoi(strFieldValue.GetBuffer(0));; vFieldValue.Clear(); vFieldValue = m_pRs->GetCollect("name"); strFieldValue = (char*)_bstr_t(vFieldValue); m_strName = strFieldValue; vFieldValue.Clear(); UpdateData(FALSE); } else { //定位到最后一条 m_pRs->MovePrevious(); AfxMessageBox("已经到最后一条了"); } } //修改记录 void CAdoCtrlAccessDlg::OnModify() { UpdateData(TRUE); if(VARIANT_FALSE == m_pRs->EndOfFile) { //修改数据库记录 _variant_t vFieldName,vFieldValue; CString strValue; vFieldName.SetString("id"); strValue.Format("%d",m_nID); vFieldValue.SetString(strValue); m_pRs->Update(vFieldName,vFieldValue); vFieldName.Clear(); vFieldValue.Clear(); vFieldName.SetString("name"); vFieldValue.SetString(m_strName); m_pRs->Update(vFieldName,vFieldValue); vFieldName.Clear(); vFieldValue.Clear(); } } void CAdoCtrlAccessDlg::OnDestroy() { //关闭记录和连接 m_pRs->Close(); m_pCon->Close(); //释放环境 ::CoUninitialize(); CDialog::OnDestroy(); }