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2019-06-15 16:57
采纳率: 100%
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MFC 学生信息管理系统 查询功能(调用另一个窗口中的列表控件?)

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https://bbs.csdn.net/topics/391853844
出现的问题和这个网址中的问题一样。
但是在查询学生信息的类中(Find.cpp),对Buttom1定义如下
图片说明

会出现m_List未定义的情况。
就算把列表所在的头文件加进去也不起作用。
如何解决?
希望各位能详细解答

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1条回答 默认 最新

  • threenewbee 2019-06-15 17:04
    已采纳

    给你完整写了一个
    方法是用构造函数把主窗体传进去
    子窗口用 GetParent 获取

    效果
    图片说明

    采纳本回答,留下email,给你

    其他人如果也需要 https://download.csdn.net/download/caozhy/11242831

    // Q765982Dlg.cpp : implementation file
    //
    
    #include "stdafx.h"
    #include "Q765982.h"
    #include "Q765982Dlg.h"
    #include "FindDialog.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()
    
    /////////////////////////////////////////////////////////////////////////////
    // CQ765982Dlg dialog
    
    CQ765982Dlg::CQ765982Dlg(CWnd* pParent /*=NULL*/)
        : CDialog(CQ765982Dlg::IDD, pParent)
    {
        //{{AFX_DATA_INIT(CQ765982Dlg)
            // 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 CQ765982Dlg::DoDataExchange(CDataExchange* pDX)
    {
        CDialog::DoDataExchange(pDX);
        //{{AFX_DATA_MAP(CQ765982Dlg)
        DDX_Control(pDX, IDC_LIST1, m_list);
        //}}AFX_DATA_MAP
    }
    
    BEGIN_MESSAGE_MAP(CQ765982Dlg, CDialog)
        //{{AFX_MSG_MAP(CQ765982Dlg)
        ON_WM_SYSCOMMAND()
        ON_WM_PAINT()
        ON_WM_QUERYDRAGICON()
        ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
        //}}AFX_MSG_MAP
    END_MESSAGE_MAP()
    
    /////////////////////////////////////////////////////////////////////////////
    // CQ765982Dlg message handlers
    
    BOOL CQ765982Dlg::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
        m_list.InsertColumn(0, "ID", LVCFMT_LEFT, 100);
        CString str;
        for (int i = 1; i <= 123; i++)
        {
            str.Format("%d", i);
            m_list.InsertItem(i, (LPCTSTR)str);
        }
        return TRUE;  // return TRUE  unless you set the focus to a control
    }
    
    void CQ765982Dlg::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 CQ765982Dlg::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 CQ765982Dlg::OnQueryDragIcon()
    {
        return (HCURSOR) m_hIcon;
    }
    
    void CQ765982Dlg::OnButton1() 
    {
        // TODO: Add your control notification handler code here
        CFindDialog dlg(this); //在这里传给子窗口
        dlg.DoModal();
    }
    
    
    // FindDialog.cpp : implementation file
    //
    
    #include "stdafx.h"
    #include "Q765982.h"
    #include "FindDialog.h"
    #include "Q765982Dlg.h"
    #ifdef _DEBUG
    #define new DEBUG_NEW
    #undef THIS_FILE
    static char THIS_FILE[] = __FILE__;
    #endif
    
    /////////////////////////////////////////////////////////////////////////////
    // CFindDialog dialog
    
    
    CFindDialog::CFindDialog(CWnd* pParent /*=NULL*/)
        : CDialog(CFindDialog::IDD, pParent)
    {
        //{{AFX_DATA_INIT(CFindDialog)
            // NOTE: the ClassWizard will add member initialization here
        //}}AFX_DATA_INIT
    }
    
    
    void CFindDialog::DoDataExchange(CDataExchange* pDX)
    {
        CDialog::DoDataExchange(pDX);
        //{{AFX_DATA_MAP(CFindDialog)
            // NOTE: the ClassWizard will add DDX and DDV calls here
        //}}AFX_DATA_MAP
    }
    
    
    BEGIN_MESSAGE_MAP(CFindDialog, CDialog)
        //{{AFX_MSG_MAP(CFindDialog)
        ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
        //}}AFX_MSG_MAP
    END_MESSAGE_MAP()
    
    /////////////////////////////////////////////////////////////////////////////
    // CFindDialog message handlers
    
    void CFindDialog::OnButton1() 
    {
        // TODO: Add your control notification handler code here
        CQ765982Dlg * dlg = (CQ765982Dlg *)GetParent(); //得到主窗口
        int i = dlg->m_list.GetItemCount();
        SetDlgItemInt(IDC_EDIT1, i);
    }
    
    
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