www.gusucode.com > VC++读写Excel文件源代码源码程序 > VC++读写Excel文件源代码源码程序\code\OdbcExcel\OdbcExcelDlg.cpp
// OdbcExcelDlg.cpp : implementation file // Download by http://www.NewXing.com #include "stdafx.h" #include "OdbcExcel.h" #include "OdbcExcelDlg.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() ///////////////////////////////////////////////////////////////////////////// // COdbcExcelDlg dialog COdbcExcelDlg::COdbcExcelDlg(CWnd* pParent /*=NULL*/) : CDialog(COdbcExcelDlg::IDD, pParent) { //{{AFX_DATA_INIT(COdbcExcelDlg) // 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 COdbcExcelDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(COdbcExcelDlg) // NOTE: the ClassWizard will add DDX and DDV calls here //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(COdbcExcelDlg, CDialog) //{{AFX_MSG_MAP(COdbcExcelDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_WRITEEXCEL, OnWriteexcel) ON_BN_CLICKED(IDC_READEXCEL, OnReadexcel) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // COdbcExcelDlg message handlers BOOL COdbcExcelDlg::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 COdbcExcelDlg::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 COdbcExcelDlg::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 COdbcExcelDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } //创建并写入Excel文件 void COdbcExcelDlg::WriteToExcel() { CDatabase database; CString sDriver = "MICROSOFT EXCEL DRIVER (*.XLS)"; // Excel安装驱动 CString sExcelFile = "c:\\demo.xls";// 要建立的Excel文件 CString sSql; TRY { // 创建进行存取的字符串 sSql.Format("DRIVER={%s};DSN='';FIRSTROWHASNAMES=1;READONLY=FALSE;CREATE_DB=\"%s\";DBQ=%s", sDriver,sExcelFile,sExcelFile); // 创建数据库 (既Excel表格文件) if( database.OpenEx(sSql,CDatabase::noOdbcDialog) ) { // 创建表结构(姓名、年龄) sSql = "CREATE TABLE demo (Name TEXT,Age NUMBER)"; database.ExecuteSQL(sSql); // 插入数值 sSql = "INSERT INTO demo (Name,Age) VALUES ('张宏林',25)"; database.ExecuteSQL(sSql); sSql = "INSERT INTO demo (Name,Age) VALUES ('肖洪伟',24)"; database.ExecuteSQL(sSql); sSql = "INSERT INTO demo (Name,Age) VALUES ('蒋渝',34)"; database.ExecuteSQL(sSql); } // 关闭数据库 database.Close(); } CATCH_ALL(e) { TRACE1("Excel驱动没有安装: %s",sDriver); } END_CATCH_ALL; } // 读取Excel文件 void COdbcExcelDlg::ReadFromExcel() { CDatabase database; CString sSql; CString sItem1, sItem2; CString sDriver; CString sDsn; CString sFile = "C:\\Demo.xls";// 将被读取的Excel文件名 // 检索是否安装有Excel驱动 "Microsoft Excel Driver (*.xls)" sDriver = GetExcelDriver(); if (sDriver.IsEmpty()) { // 没有发现Excel驱动 AfxMessageBox("没有安装Excel驱动!"); return; } // 创建进行存取的字符串 sDsn.Format("ODBC;DRIVER={%s};DSN='';DBQ=%s", sDriver,sFile); TRY { // 打开数据库(既Excel文件) database.Open(NULL, false, false, sDsn); CRecordset recset(&database); // 设置读取的查询语句 sSql = "SELECT Name, Age FROM demo ORDER BY Name"; //执行查询语句 recset.Open(CRecordset::forwardOnly, sSql, CRecordset::readOnly); // 获取查询结果 while (!recset.IsEOF()) { //读取Excel内部数值 recset.GetFieldValue("Name", sItem1); recset.GetFieldValue("Age", sItem2); CString strMsg; strMsg.Format("Name:%s,Age:%s",sItem1,sItem2); AfxMessageBox(strMsg); // 移到下一行 recset.MoveNext(); } // 关闭数据库 database.Close(); } CATCH(CDBException, e) { // 数据库操作产生异常时... AfxMessageBox("数据库错误: " + e->m_strError); } END_CATCH; } // 获取ODBC中Excel驱动 CString COdbcExcelDlg::GetExcelDriver() { char szBuf[2001]; WORD cbBufMax = 2000; WORD cbBufOut; char *pszBuf = szBuf; CString sDriver; // 获取已安装驱动的名称(涵数在odbcinst.h里) if (!SQLGetInstalledDrivers(szBuf, cbBufMax, &cbBufOut)) return ""; // 检索已安装的驱动是否有Excel... do { if (strstr(pszBuf, "Excel") != 0) { //发现 ! sDriver = CString(pszBuf); break; } pszBuf = strchr(pszBuf, '\0') + 1; } while (pszBuf[1] != '\0'); return sDriver; } void COdbcExcelDlg::OnWriteexcel() { WriteToExcel(); } void COdbcExcelDlg::OnReadexcel() { ReadFromExcel(); }