实例介绍
【实例简介】C 文件操作参考实例,方便学习文件操作,数据转换
【实例截图】
【核心代码】
// OrderReadFileDlg.cpp : implementation file // #include "stdafx.h" #include "OrderReadFile.h" #include "OrderReadFileDlg.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() ///////////////////////////////////////////////////////////////////////////// // COrderReadFileDlg dialog COrderReadFileDlg::COrderReadFileDlg(CWnd* pParent /*=NULL*/) : CDialog(COrderReadFileDlg::IDD, pParent) { //{{AFX_DATA_INIT(COrderReadFileDlg) // 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 COrderReadFileDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(COrderReadFileDlg) // NOTE: the ClassWizard will add DDX and DDV calls here //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(COrderReadFileDlg, CDialog) //{{AFX_MSG_MAP(COrderReadFileDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_BTREAD, OnRead) ON_BN_CLICKED(IDC_BTOPEN, OnOpen) ON_BN_CLICKED(IDC_BTEXIT, OnExit) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // COrderReadFileDlg message handlers BOOL COrderReadFileDlg::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 GetDlgItem(IDC_BTREAD)->EnableWindow(FALSE); return TRUE; // return TRUE unless you set the focus to a control } void COrderReadFileDlg::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 COrderReadFileDlg::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 COrderReadFileDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void COrderReadFileDlg::OnRead() { CString strserver,strdatabase,strusr,strpwd,readstring; if(file) { readlen=file.ReadString(readstring); if(!readlen) { GetDlgItem(IDC_BTREAD)->EnableWindow(FALSE); return; } int pos=readstring.Find(" "); strserver=readstring.Left(pos); readstring=readstring.Right(readstring.GetLength()-pos-1); pos=readstring.Find(" "); strdatabase=readstring.Left(pos); readstring=readstring.Right(readstring.GetLength()-pos-1); pos=readstring.Find(" "); strusr=readstring.Left(pos); readstring=readstring.Right(readstring.GetLength()-pos-1); pos=readstring.Find(" "); strpwd=readstring.Left(pos); readstring=readstring.Right(readstring.GetLength()-pos-1); GetDlgItem(IDC_EDSERVER)->SetWindowText(strserver); GetDlgItem(IDC_EDDATABASE)->SetWindowText(strdatabase); GetDlgItem(IDC_EDUSR)->SetWindowText(strusr); GetDlgItem(IDC_EDPWD)->SetWindowText(strpwd); } } void COrderReadFileDlg::OnOpen() { CString strserver,strdatabase,strusr,strpwd,readstring; try{ file.Open("test.txt",CFile::modeRead); GetDlgItem(IDC_BTOPEN)->EnableWindow(FALSE); GetDlgItem(IDC_BTREAD)->EnableWindow(TRUE); AfxMessageBox("文件已打开"); }catch(CFileException *e) { TCHAR szBuf[256]; e->GetErrorMessage(szBuf,256,NULL); MessageBox(szBuf,_T("Warning")); e->Delete(); } if(file) { readlen=file.ReadString(readstring); if(!readlen) { GetDlgItem(IDC_BTREAD)->EnableWindow(FALSE); return; } int pos=readstring.Find(" "); strserver=readstring.Left(pos); readstring=readstring.Right(readstring.GetLength()-pos-1); pos=readstring.Find(" "); strdatabase=readstring.Left(pos); readstring=readstring.Right(readstring.GetLength()-pos-1); pos=readstring.Find(" "); strusr=readstring.Left(pos); readstring=readstring.Right(readstring.GetLength()-pos-1); pos=readstring.Find(" "); strpwd=readstring.Left(pos); readstring=readstring.Right(readstring.GetLength()-pos-1); GetDlgItem(IDC_EDSERVER)->SetWindowText(strserver); GetDlgItem(IDC_EDDATABASE)->SetWindowText(strdatabase); GetDlgItem(IDC_EDUSR)->SetWindowText(strusr); GetDlgItem(IDC_EDPWD)->SetWindowText(strpwd); } } void COrderReadFileDlg::OnExit() { file.Close(); this->OnCancel(); }
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