调试断言失败了！ MFC应用Visual Studio 2015 c ++ [英] Debug assertion failed! MFC Application Visual studio 2015 c++

问题描述

我是视觉工作室的新手，我想创建一个带有组合框选择的简单mfc应用程序。 

I am new to visual studio and I want to create a simple mfc application with a combo box selection. 

// MFCApplicationTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MFCApplicationTest.h"
#include "MFCApplicationTestDlg.h"
#include "afxdialogex.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialogEx
{
public:
    CAboutDlg();

// Dialog Data
#ifdef AFX_DESIGN_TIME
    enum { IDD = IDD_ABOUTBOX };
#endif

    protected:
    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
    DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(IDD_ABOUTBOX)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()


// CMFCApplicationTestDlg dialog



CMFCApplicationTestDlg::CMFCApplicationTestDlg(CWnd* pParent /*=NULL*/)
    : CDialogEx(IDD_MFCAPPLICATIONTEST_DIALOG, pParent)
{
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMFCApplicationTestDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CMFCApplicationTestDlg, CDialogEx)
    ON_WM_SYSCOMMAND()
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    ON_CBN_SELCHANGE(IDC_COMBO1, &CMFCApplicationTestDlg::OnCbnSelchangeCombo1)
    ON_CBN_SELENDOK(IDC_COMBO1, &CMFCApplicationTestDlg::OnCbnSelendokCombo1)
END_MESSAGE_MAP()


// CMFCApplicationTestDlg message handlers

BOOL CMFCApplicationTestDlg::OnInitDialog()
{
    CDialogEx::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)
    {
        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);
        }
    }

    // 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
    CComboBox *combo = new CComboBox();
    combo->AddString(L"csv1.csv");
    combo->AddString(L"csv2.csv");
    combo->AddString(L"csv3.csv");


    return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMFCApplicationTestDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
    if ((nID & 0xFFF0) == IDM_ABOUTBOX)
    {
        CAboutDlg dlgAbout;
        dlgAbout.DoModal();
    }
    else
    {
        CDialogEx::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 CMFCApplicationTestDlg::OnPaint()
{
    if (IsIconic())
    {
        CPaintDC dc(this); // device context for painting

        SendMessage(WM_ICONERASEBKGND, reinterpret_cast<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
    {
        CDialogEx::OnPaint();
    }
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CMFCApplicationTestDlg::OnQueryDragIcon()
{
    return static_cast<HCURSOR>(m_hIcon);
}



void CMFCApplicationTestDlg::OnCbnSelchangeCombo1()
{
    // TODO: Add your control notification handler code here
    CString csv[] = { _T(""), _T("csv1.csv"),_T("csv2.csv"),_T("csv3.csv") };
    UpdateData(FALSE);
}


void CMFCApplicationTestDlg::OnCbnSelendokCombo1()
{
    CComboBox *combo1 = new CComboBox();
    CString file;
    int n;
    // TODO: Add your control notification handler code here
    int index = combo1->GetCurSel();
    combo1->GetLBText(index, file);

}




它一直工作到昨天，我只是想知道如何显示字符串。但今天我遇到了这个问题

It was working till yesterday and I was just wondering how to display the string. But today I have got this problem which says

Debug Assertion failed!

Program:
...Root\MFCApp\MFCApplicationTest2\Debug\MFCApplicationTest2.exe
File:f:\dd\vctools\cv7libs\shop\atlmfc\include\afxwin2.inl
Line: 795

For information on how your program can cause an assertion failure, see the Visual C++ documentation on asserts.

(Please retry to debug the application)

当我点击重试时，我得到了这个，

And when I click retry I get this,

MFCApplicationTest2.exe has triggered a breakpoint.

打破这个问题会让我对这一断言失败，

breaking this takes me to this line of assertion failure,

	{ ASSERT(::IsWindow(m_hWnd)); return (int)::SendMessage(m_hWnd, CB_ADDSTRING, 0, (LPARAM)lpszString); }

我查了这篇与此论坛主题相关的帖子，

I checked this post which is related to my question on the topic on this forum,

我注意到我没犯错误而且我我不确定是什么问题。

and I noticed that I haven't made that mistake and I am not sure what the problem is.

请帮忙。

推荐答案

我是visual studio的新手，我想创建一个带有组合框选择的简单mfc应用程序。 

I am new to visual studio and I want to create a simple mfc application with a combo box selection. 

// MFCApplicationTestDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MFCApplicationTest.h"
#include "MFCApplicationTestDlg.h"
#include "afxdialogex.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialogEx
{
public:
    CAboutDlg();

// Dialog Data
#ifdef AFX_DESIGN_TIME
    enum { IDD = IDD_ABOUTBOX };
#endif

    protected:
    virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
    DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialogEx(IDD_ABOUTBOX)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialogEx)
END_MESSAGE_MAP()


// CMFCApplicationTestDlg dialog



CMFCApplicationTestDlg::CMFCApplicationTestDlg(CWnd* pParent /*=NULL*/)
    : CDialogEx(IDD_MFCAPPLICATIONTEST_DIALOG, pParent)
{
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMFCApplicationTestDlg::DoDataExchange(CDataExchange* pDX)
{
    CDialogEx::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CMFCApplicationTestDlg, CDialogEx)
    ON_WM_SYSCOMMAND()
    ON_WM_PAINT()
    ON_WM_QUERYDRAGICON()
    ON_CBN_SELCHANGE(IDC_COMBO1, &CMFCApplicationTestDlg::OnCbnSelchangeCombo1)
    ON_CBN_SELENDOK(IDC_COMBO1, &CMFCApplicationTestDlg::OnCbnSelendokCombo1)
END_MESSAGE_MAP()


// CMFCApplicationTestDlg message handlers

BOOL CMFCApplicationTestDlg::OnInitDialog()
{
    CDialogEx::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)
    {
        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);
        }
    }

    // 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
    CComboBox *combo = new CComboBox();
    combo->AddString(L"csv1.csv");
    combo->AddString(L"csv2.csv");
    combo->AddString(L"csv3.csv");


    return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMFCApplicationTestDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
    if ((nID & 0xFFF0) == IDM_ABOUTBOX)
    {
        CAboutDlg dlgAbout;
        dlgAbout.DoModal();
    }
    else
    {
        CDialogEx::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 CMFCApplicationTestDlg::OnPaint()
{
    if (IsIconic())
    {
        CPaintDC dc(this); // device context for painting

        SendMessage(WM_ICONERASEBKGND, reinterpret_cast<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
    {
        CDialogEx::OnPaint();
    }
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CMFCApplicationTestDlg::OnQueryDragIcon()
{
    return static_cast<HCURSOR>(m_hIcon);
}



void CMFCApplicationTestDlg::OnCbnSelchangeCombo1()
{
    // TODO: Add your control notification handler code here
    CString csv[] = { _T(""), _T("csv1.csv"),_T("csv2.csv"),_T("csv3.csv") };
    UpdateData(FALSE);
}


void CMFCApplicationTestDlg::OnCbnSelendokCombo1()
{
    CComboBox *combo1 = new CComboBox();
    CString file;
    int n;
    // TODO: Add your control notification handler code here
    int index = combo1->GetCurSel();
    combo1->GetLBText(index, file);

}




它一直工作到昨天，我只是想知道如何显示字符串。但今天我遇到了这个问题

It was working till yesterday and I was just wondering how to display the string. But today I have got this problem which says

Debug Assertion failed!

Program:
...Root\MFCApp\MFCApplicationTest2\Debug\MFCApplicationTest2.exe
File:f:\dd\vctools\cv7libs\shop\atlmfc\include\afxwin2.inl
Line: 795

For information on how your program can cause an assertion failure, see the Visual C++ documentation on asserts.

(Please retry to debug the application)

当我点击重试时，我得到了这个，

And when I click retry I get this,

MFCApplicationTest2.exe has triggered a breakpoint.

打破这个问题会让我对这一断言失败，

breaking this takes me to this line of assertion failure,

	{ ASSERT(::IsWindow(m_hWnd)); return (int)::SendMessage(m_hWnd, CB_ADDSTRING, 0, (LPARAM)lpszString); }

我查了这篇与此论坛主题相关的帖子，

I checked this post which is related to my question on the topic on this forum,

我注意到我没有犯这个错误。但是如果我继续重试并点击继续，它会将我带到输出。

and I noticed that I haven't made that mistake. But then if I keep retrying and hit continue it takes me to the output.

我不确定问题是什么。请帮忙。 

I am not sure what the problem is. Please do help. 

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