这样程序为什么会死掉??(代码内详)

不能再调用OnInitialUpdate()函数了，当视图第一次创建时系统自动调用，完成数据的初始化工作。
若再在else里面再调用时，则会出现资源重复创建等内存泄漏情况，所以程序就死掉了。

代码用在哪了？默认的主窗口已经出现了？检查一下
CClientView* pView=(CClientView*)((CMainFrame*)AfxGetApp()->m_pMainWnd)->GetActiveView();
哪个指针无效。

试试在 CWinApp::InitInstance() 中显示登陆窗口。//显示登陆窗口（DoModal），如果 return FALSE，程序退出。
m_pMainWnd->ShowWindow(SW_MAXIMIZE);
m_pMainWnd->UpdateWindow();

我是在 CWinApp::InitInstance() 中显示登陆窗口的啊
但是有个登陆时的"确定"按钮我是做在登陆的类里面的
所以在点击"确定"时需要我说的那个else语句

不太明白 LZ 的意思，但在调用 m_pMainWnd->ShowWindow(SW_MAXIMIZE) 前 CClientView 的 OnInitialUpdate() 已经执行了，所以不需要再手动调用 OnInitialUpdate() 函数。

我现在不用执行OnInitialUpdate()了之前的想法不太合理
现在关键是我用了
m_pMainWnd->ShowWindow(SW_MAXIMIZE);
m_pMainWnd->UpdateWindow();
程序界面出不来只是闪一下就完了这是怎么回事呢??

//如果不能输入正确的号码，才返回 FALSE，此时程序退出。
if (IDOK != CLoginDialog.DoModal())
return FALSE;m_pMainWnd->ShowWindow(SW_MAXIMIZE);
m_pMainWnd->UpdateWindow();

我也是这样做的
只是实现没有放在 CWinAPP里面
我是在我的CLoginDialog类里面实现的
就出现了我说的那种只是闪一下的问题而没有出现窗口

窗口是闪了一下，程序就退出了？CWinApp 要返回 TRUE，程序才会继续运行。m_pMainWnd->ShowWindow(SW_SHOW);
m_pMainWnd->UpdateWindow();return TRUE;

这个我知道,我是在 CLoginDialog::OnOk()
里面去响应"确定"的并没有在CWinApp里面去做.

m_pMainWnd->ShowWindow(SW_SHOW); //在这里断点，看看能否运行到这里。

CWnd* m_pMainWnd=((CMainFrame*)AfxGetApp()->m_pMainWnd);
m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
m_pMainWnd->UpdateWindow();
CDialog::OnOK();能运行到m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
只是看到窗口闪了一下然后就消失了....

谢谢你的耐心啊
LWX300

相当抱歉，我不用 QQ、MSN 这些聊天软件的，你可以在 CSDN 发信给我就可以了。

我把代码贴出来了这两个主要的地方/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////这是我的CLoginDlg的OnOk/////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void CLoginDlg::OnOK()
{ // TODO: Add extra validation here
CPswdSet* m_recordset=new CPswdSet(&m_database);
CString strSQL;
UpdateData(TRUE);//读入用户输入的密码
strSQL.Format("select * from password where PASSWORD='%s'",m_password);
m_recordset->Open(AFX_DB_USE_DEFAULT_TYPE,strSQL);//从数据库中查找，输入的密码是否正确
if(m_recordset->GetRecordCount()==0)
{
if(count<3)
{
MessageBox("口令错误!","提示",MB_OK|MB_ICONINFORMATION);
count++;//登录次数加1
m_password.Empty();
m_ctrlpassword.SetFocus();
UpdateData(FALSE);
}
else
{
MessageBox("你无权使用此系统!","警告",MB_OK|MB_ICONHAND);
m_database.Close();//关闭数据库
CDialog::OnOK();//关闭对话框
}
}
//如果登录成功，则打开主界面
else
{
CWnd* m_pMainWnd=((CMainFrame*)AfxGetApp()->m_pMainWnd);
m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
m_pMainWnd->UpdateWindow();
CDialog::OnOK();
}}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////这是我的CWinApp////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////BOOL CWinApp::InitInstance()
{
CAddressDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
}
else if (nResponse == IDCANCEL)
{
}
return FALSE; AfxEnableControlContainer(); // Standard initialization
// If you are not using these features and wish to reduce the size
//  of your final executable, you should remove from the following
//  the specific initialization routines you do not need.#ifdef _AFXDLL
Enable3dControls(); // Call this when using MFC in a shared DLL
#else
Enable3dControlsStatic(); // Call this when linking to MFC statically
#endif // Change the registry key under which our settings are stored.
// TODO: You should modify this string to be something appropriate
// such as the name of your company or organization.
SetRegistryKey(_T("Local AppWizard-Generated Applications")); LoadStdProfileSettings();  // Load standard INI file options (including MRU) // Register the application's document templates.  Document templates
//  serve as the connection between documents, frame windows and views. CSingleDocTemplate* pDocTemplate;
pDocTemplate = new CSingleDocTemplate(
IDR_MAINFRAME,
RUNTIME_CLASS(CClientDoc),
RUNTIME_CLASS(CMainFrame),       // main SDI frame window
RUNTIME_CLASS(CClientView));
AddDocTemplate(pDocTemplate); // Parse command line for standard shell commands, DDE, file open
CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo); // Dispatch commands specified on the command line
if (!ProcessShellCommand(cmdInfo))
return FALSE; // The one and only window has been initialized, so show and update it.
/*
m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
m_pMainWnd->UpdateWindow();
return TRUE;
*/}

//晕这个才是对的......
//说明一下我的CLoginDlg为CAddressDlg..怕大家看不明白所以说明一下
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////这是我的CAddressDlg/////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////void CAddressDlg::OnOK()
{        // TODO: Add extra validation here
        CPswdSet* m_recordset=new CPswdSet(&m_database);
        CString strSQL;
        UpdateData(TRUE);//读入用户输入的密码
        strSQL.Format("select * from password where PASSWORD='%s'",m_password);
        m_recordset->Open(AFX_DB_USE_DEFAULT_TYPE,strSQL);//从数据库中查找，输入的密码是否正确
        if(m_recordset->GetRecordCount()==0)
        {
            if(count<3)
            {
                MessageBox("口令错误!","提示",MB_OK|MB_ICONINFORMATION);
                count++;//登录次数加1
                m_password.Empty();
                m_ctrlpassword.SetFocus();
                UpdateData(FALSE);
            }
            else
            {
                MessageBox("你无权使用此系统!","警告",MB_OK|MB_ICONHAND);
                m_database.Close();//关闭数据库
                CDialog::OnOK();//关闭对话框
            }
        }
        //如果登录成功，则打开主界面
        else
        {
            CWnd* m_pMainWnd=((CMainFrame*)AfxGetApp()->m_pMainWnd);
            m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
            m_pMainWnd->UpdateWindow();
            CDialog::OnOK();
        }}
///////////////////////////////////////////////////////////////////////////////////////////
////////////这是我的CWinApp////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////BOOL CClientApp::InitInstance()
{
    CAddressDlg dlg;
    m_pMainWnd = &dlg;
    int nResponse = dlg.DoModal();
    if (nResponse == IDOK)
    {
    }
    else if (nResponse == IDCANCEL)
    {
    }
    return FALSE;    AfxEnableControlContainer();    // Standard initialization
    // If you are not using these features and wish to reduce the size
    //  of your final executable, you should remove from the following
    //  the specific initialization routines you do not need.#ifdef _AFXDLL
    Enable3dControls();            // Call this when using MFC in a shared DLL
#else
    Enable3dControlsStatic();    // Call this when linking to MFC statically
#endif    // Change the registry key under which our settings are stored.
    // TODO: You should modify this string to be something appropriate
    // such as the name of your company or organization.
    SetRegistryKey(_T("Local AppWizard-Generated Applications"));    LoadStdProfileSettings();  // Load standard INI file options (including MRU)    // Register the application's document templates.  Document templates
    //  serve as the connection between documents, frame windows and views.    CSingleDocTemplate* pDocTemplate;
    pDocTemplate = new CSingleDocTemplate(
        IDR_MAINFRAME,
        RUNTIME_CLASS(CClientDoc),
        RUNTIME_CLASS(CMainFrame),       // main SDI frame window
        RUNTIME_CLASS(CClientView));
    AddDocTemplate(pDocTemplate);    // Parse command line for standard shell commands, DDE, file open
    CCommandLineInfo cmdInfo;
    ParseCommandLine(cmdInfo);    // Dispatch commands specified on the command line
    if (!ProcessShellCommand(cmdInfo))
        return FALSE;    // The one and only window has been initialized, so show and update it.
/*
    m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
    m_pMainWnd->UpdateWindow();
    return TRUE;
*/}

CAddressDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
}
else if (nResponse == IDCANCEL)
{
}
return FALSE; //InitInstance 返回 FALSE，程序直接退出了。

BOOL CClientApp::InitInstance()
{
     AfxEnableControlContainer();    // Standard initialization
    // If you are not using these features and wish to reduce the size
    //  of your final executable, you should remove from the following
    //  the specific initialization routines you do not need.#ifdef _AFXDLL
    Enable3dControls();            // Call this when using MFC in a shared DLL
#else
    Enable3dControlsStatic();    // Call this when linking to MFC statically
#endif    // Change the registry key under which our settings are stored.
    // TODO: You should modify this string to be something appropriate
    // such as the name of your company or organization.
    SetRegistryKey(_T("Local AppWizard-Generated Applications"));    LoadStdProfileSettings();  // Load standard INI file options (including MRU)    // Register the application's document templates.  Document templates
    //  serve as the connection between documents, frame windows and views.    CSingleDocTemplate* pDocTemplate;
    pDocTemplate = new CSingleDocTemplate(
        IDR_MAINFRAME,
        RUNTIME_CLASS(CClientDoc),
        RUNTIME_CLASS(CMainFrame),       // main SDI frame window
        RUNTIME_CLASS(CClientView));
    AddDocTemplate(pDocTemplate);    // Parse command line for standard shell commands, DDE, file open
    CCommandLineInfo cmdInfo;
    ParseCommandLine(cmdInfo);    // Dispatch commands specified on the command line
    if (!ProcessShellCommand(cmdInfo))
        return FALSE;    // The one and only window has been initialized, so show and update it.
   CAddressDlg dlg;
   if (IDOK != dlg.DoModal())
      return FALSE;    m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
    m_pMainWnd->UpdateWindow();
    return TRUE;
}void CAddressDlg::OnOK()
{        if(m_recordset->GetRecordCount()==0)
        {
            if(count<3)
            {
              ...
              return;
            }
            else
            {
               ...
                 CDialog::OnCancel();//关闭对话框
             }
        }
        //如果登录成功，则打开主界面
        CDialog::OnOK();
}

void CAddressDlg::OnOK()
{         if(m_recordset->GetRecordCount()==0)
        {
            if(count <3)
            {
              ...
              return;
            }
            else
            {
              ...
                CDialog::OnCancel();//关闭对话框
                 return; //再加上这句。
            }
        }
        //如果登录成功，则打开主界面
        CDialog::OnOK();
}

CDialog::OnOK(); 这一句有问题，调用后直接退出程序了，不闪才怪

还在调呢不过界面窗口跟登陆窗口是一起出来的哦有点BUG

BOOL CClientApp::InitInstance()
{
CAddressDlg dlg;
if (IDOK != dlg.DoModal())
return FALSE; //这里用于返回假,使窗口不能打开    AfxEnableControlContainer();

    // Standard initialization
    // If you are not using these features and wish to reduce the size
    //  of your final executable, you should remove from the following
    //  the specific initialization routines you do not need.

#ifdef _AFXDLL
    Enable3dControls();            // Call this when using MFC in a shared DLL
#else
    Enable3dControlsStatic();    // Call this when linking to MFC statically
#endif

    // Change the registry key under which our settings are stored.
    // TODO: You should modify this string to be something appropriate
    // such as the name of your company or organization.
    SetRegistryKey(_T("Local AppWizard-Generated Applications"));

    LoadStdProfileSettings();  // Load standard INI file options (including MRU)

    // Register the application's document templates.  Document templates
    //  serve as the connection between documents, frame windows and views.

    CSingleDocTemplate* pDocTemplate;
    pDocTemplate = new CSingleDocTemplate(
        IDR_MAINFRAME,
        RUNTIME_CLASS(CClientDoc),
        RUNTIME_CLASS(CMainFrame),      // main SDI frame window
        RUNTIME_CLASS(CClientView));
    AddDocTemplate(pDocTemplate);

    // Parse command line for standard shell commands, DDE, file open
    CCommandLineInfo cmdInfo;
    ParseCommandLine(cmdInfo);

    // Dispatch commands specified on the command line
    if (!ProcessShellCommand(cmdInfo))
        return FALSE;

    // The one and only window has been initialized, so show and update it.
    m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);
    m_pMainWnd->UpdateWindow();
    return TRUE;
}

调试易

这样程序为什么会死掉??(代码内详)

解决方案 »