MFC显示图片和写入文件

// MFC_pictureDlg.h : 头文件//#pragma once// CMFC_pictureDlg 对话框class CMFC_pictureDlg : public CDialogEx{// 构造public:    CMFC_pictureDlg(CWnd* pParent = NULL);    // 标准构造函数// 对话框数据    enum { IDD = IDD_MFC_PICTURE_DIALOG };    protected:    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持// 实现protected:    HICON m_hIcon;    // 生成的消息映射函数    virtual BOOL OnInitDialog();    afx_msg void OnSysCommand(UINT nID, LPARAM lParam);    afx_msg void OnPaint();    afx_msg HCURSOR OnQueryDragIcon();    DECLARE_MESSAGE_MAP()public:    afx_msg void OnBnClickedButton1();    CString Str_path;    afx_msg void OnBnClickedButton2();};

// MFC_pictureDlg.cpp : 实现文件//#include "stdafx.h"#include "MFC_picture.h"#include "MFC_pictureDlg.h"#include "afxdialogex.h"#ifdef _DEBUG#define new DEBUG_NEW#endif// 用于应用程序“关于”菜单项的 CAboutDlg 对话框class CAboutDlg : public CDialogEx{public:    CAboutDlg();// 对话框数据    enum { IDD = IDD_ABOUTBOX };    protected:    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持// 实现protected:    DECLARE_MESSAGE_MAP()};CAboutDlg::CAboutDlg() : CDialogEx(CAboutDlg::IDD){}void CAboutDlg::DoDataExchange(CDataExchange* pDX){    CDialogEx::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)END_MESSAGE_MAP()// CMFC_pictureDlg 对话框CMFC_pictureDlg::CMFC_pictureDlg(CWnd* pParent /*=NULL*/)    : CDialogEx(CMFC_pictureDlg::IDD, pParent)    , Str_path(_T("")){    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);}void CMFC_pictureDlg::DoDataExchange(CDataExchange* pDX){    CDialogEx::DoDataExchange(pDX);    DDX_Text(pDX, IDC_EDIT1, Str_path);}BEGIN_MESSAGE_MAP(CMFC_pictureDlg, CDialogEx)    ON_WM_SYSCOMMAND()    ON_WM_PAINT()    ON_WM_QUERYDRAGICON()    ON_BN_CLICKED(IDC_BUTTON1, &CMFC_pictureDlg::OnBnClickedButton1)    ON_BN_CLICKED(IDC_BUTTON2, &CMFC_pictureDlg::OnBnClickedButton2)END_MESSAGE_MAP()// CMFC_pictureDlg 消息处理程序BOOL CMFC_pictureDlg::OnInitDialog(){    CDialogEx::OnInitDialog();    // 将“关于...”菜单项添加到系统菜单中。    // IDM_ABOUTBOX 必须在系统命令范围内。    ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);    ASSERT(IDM_ABOUTBOX < 0xF000);    CMenu* pSysMenu = GetSystemMenu(FALSE);    if (pSysMenu != NULL)    {        BOOL bNameValid;        CString strAboutMenu;        bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);        ASSERT(bNameValid);        if (!strAboutMenu.IsEmpty())        {            pSysMenu->AppendMenu(MF_SEPARATOR);            pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);        }    }    // 设置此对话框的图标。  当应用程序主窗口不是对话框时，框架将自动    //  执行此操作    SetIcon(m_hIcon, TRUE);            // 设置大图标    SetIcon(m_hIcon, FALSE);        // 设置小图标    // TODO:  在此添加额外的初始化代码///////////////////////////////////////////////////////////////////////    return TRUE;  // 除非将焦点设置到控件，否则返回 TRUE}void CMFC_pictureDlg::OnSysCommand(UINT nID, LPARAM lParam){    if ((nID & 0xFFF0) == IDM_ABOUTBOX)    {        CAboutDlg dlgAbout;        dlgAbout.DoModal();    }    else    {        CDialogEx::OnSysCommand(nID, lParam);    }}// 如果向对话框添加最小化按钮，则需要下面的代码//  来绘制该图标。  对于使用文档/视图模型的 MFC 应用程序，//  这将由框架自动完成。void CMFC_pictureDlg::OnPaint(){    if (IsIconic())    {        CPaintDC dc(this); // 用于绘制的设备上下文        SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);        // 使图标在工作区矩形中居中        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;        // 绘制图标        dc.DrawIcon(x, y, m_hIcon);    }    else    {        CDialogEx::OnPaint();    }    }//当用户拖动最小化窗口时系统调用此函数取得光标//显示。HCURSOR CMFC_pictureDlg::OnQueryDragIcon(){    return static_cast<HCURSOR>(m_hIcon);}void CMFC_pictureDlg::OnBnClickedButton1(){    // TODO:  在此添加控件通知处理程序代码    LPCTSTR pFileName = _T("My_log.txt");    char* write_data = "hello world !\r\n";    CFile file;     file.Open(pFileName, CFile::modeCreate | CFile::modeNoTruncate | CFile::modeWrite);    file.SeekToEnd();    file.Write(write_data, strlen(write_data));    file.Flush();    file.Close();}void CMFC_pictureDlg::OnBnClickedButton2(){    // TODO:  在此添加控件通知处理程序代码    CFileDialog FileDlg(TRUE, NULL, _T("E:\\huangtao7\\picture\\"),         OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,         _T("image files(*.jpeg; *.jpg; *.bmp) |*.jpeg; *.jpg; *.bmp | All Files (*.*) |*.*||"),        NULL, 0, TRUE);        if (FileDlg.DoModal() == IDOK)    {        Str_path = FileDlg.GetPathName();        SetDlgItemText(IDC_EDIT1, Str_path);    }    else    {        Str_path = _T("");        MessageBox(_T("打开失败"), NULL, MB_OK);    }    if (Str_path != _T(""))    {        CImage  image;        CRect   rect;        image.Load(Str_path);        int cx = image.GetWidth();        int cy = image.GetHeight();        // 控件大小        GetDlgItem(IDC_STATIC)->GetWindowRect(&rect);        // 将客户区选中到控件表示的矩形区域内          ScreenToClient(&rect);        // 窗口移动到控件表示的区域，窗口大小将根据图片大小改变         GetDlgItem(IDC_STATIC)->MoveWindow(rect.left, rect.top, cx, cy, TRUE);        CWnd *pWnd = GetDlgItem(IDC_STATIC);        pWnd->GetClientRect(&rect);        CDC *pDc = pWnd->GetDC();        image.Draw(pDc->m_hDC, rect);        ReleaseDC(pDc);    }}