VC ++ 2010:“显示打开"对话框挂起 [英] VC++ 2010: Show open dialog hangs
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问题描述
从VC ++ 6迁移到VC2010后出现问题.应用程序已编译，但是当我单击打开"以使用覆盖的文件打开文件时，CDialog类对话框在加载一半后挂起.我不是一名优秀的C ++开发人员，因此很难找到上一个问题.
挂起时，立即窗口仅返回此错误:
"AliEditor.exe中0x006c69cc处的首次机会异常:0xC0000005:访问冲突读取位置0x00000020."
主窗体代码调用打开对话框":
Hi,
I am having issue after migrated from VC++ 6 to VC2010. Application is compiled but when I click open to open File using overriden CDialog class dialog hangs after loading halfway. I am not good C++ developer so having difficulty to find last issue.
Immediate window returns only this error when hangs:
"First-chance exception at 0x006c69cc in AliEditor.exe: 0xC0000005: Access violation reading location 0x00000020."
Main Form code calling Open Dialog:
void CMainFrame::OnFileOpen()
{
static TCHAR BASED_CODE szFilter[] = _T("Open Bin File(*.abs)|")
_T("Default DataBase File(*.ddf)|")
_T("SatCodex File(*.sdx)|")
_T("Format Text File(*.txt)");
// TODO: Add your command handler code here
CFileDlg fd(TRUE, "*.abs", "", OFN_HIDEREADONLY, szFilter, GetForegroundWindow() ); // | OFN_OVERWRITEPROMPT
//"Open Bin File(*.abs)|Default DataBase File(*.ddf)|SatCodex File(*.sdx)|Format Text File(*.txt)");
const int c_cMaxFiles = 1;
const int c_cbBuffSize = (c_cMaxFiles * (MAX_PATH + 1)) + 1;
fd.GetOFN().lpstrFile = m_strFilePathName.GetBuffer(c_cbBuffSize);
fd.GetOFN().nMaxFile = c_cbBuffSize;
//Hangs inside this call
if(fd.DoModal() != IDOK) return;
......
}
文件FileDlg.h标头:
File FileDlg.h header:
#if !defined(AFX_FILEDLG_H__8C927F99_3840_4A93_9E17_E153C675F9D4__INCLUDED_)
#define AFX_FILEDLG_H__8C927F99_3840_4A93_9E17_E153C675F9D4__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// FileDlg.h : header file
//
#include "FileExportDialog.h"
/////////////////////////////////////////////////////////////////////////////
// CFileDlg dialog
class CFileDlg : public CFileExportDialog
{
DECLARE_DYNAMIC(CFileDlg)
public:
CFileDlg(BOOL bOpenFileDialog, // TRUE for FileOpen, FALSE for FileSaveAs
LPCTSTR lpszDefExt = NULL,
LPCTSTR lpszFileName = NULL,
DWORD dwFlags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
LPCTSTR lpszFilter = NULL,
CWnd* pParentWnd = NULL);
protected:
//{{AFX_MSG(CFileDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_FILEDLG_H__8C927F99_3840_4A93_9E17_E153C675F9D4__INCLUDED_)
文件FileDlg.cpp代码(初始化对话框):
File FileDlg.cpp code (initialising dialog):
// FileDlg.cpp : implementation file
//
#include "stdafx.h"
#include "AliEditor.h"
#include "FileDlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CFileDlg
IMPLEMENT_DYNAMIC(CFileDlg, CFileDialog)
CFileDlg::CFileDlg(BOOL bOpenFileDialog, LPCTSTR lpszDefExt, LPCTSTR lpszFileName,
DWORD dwFlags, LPCTSTR lpszFilter, CWnd* pParentWnd) :
CFileExportDialog(bOpenFileDialog, lpszDefExt, lpszFileName, dwFlags, lpszFilter, pParentWnd)
{
}
BEGIN_MESSAGE_MAP(CFileDlg, CFileExportDialog)
//{{AFX_MSG_MAP(CFileDlg)
ON_WM_CLOSE()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
上面的代码调用的FileExportDialog.cpp文件中的其他初始化部分:
Other initialization part in FileExportDialog.cpp file called by code above:
//****************************************************************************
// N O L D U S I N F O R M A T I O N T E C H N O L O G Y B . V .
//****************************************************************************
// Filename: CFileExportDialog.cpp
// Project: EthoVision
// Module: Visualization
// Programmer: Anneke Sicherer-Roetman
// Version: 1.00
// Revision Date: 22-03-1999
//****************************************************************************
// Description: Definition of class CFileExportDialog
// See CFileExportDialog.h
//****************************************************************************
// Revision history:
// 22-03-1999 - First implementation
//****************************************************************************
// Bugs: ........
//****************************************************************************
// @doc
//****************************************************************************
#include "stdafx.h"
#include <dlgs.h>
#include "FileExportDialog.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
// helper functions, defined at end
int Split(char *str,char *word[],int max,char c);
char *newdup(const char *str);
IMPLEMENT_DYNAMIC(CFileExportDialog, FILEEXPORTDIALOG_BASECLASS)
//****************************************************************************
// Function CFileExportDialog::CFileExportDialog
// @mfunc constructor, creates dialog title and filter buffers
// @parm const CString | &title | dialog title
// @parm const CString | &filter | file filter<nl>
// The filter MUST be of the form "Word File (*.doc)\|Text File (*.txt)"<nl>
// .i.e one extension per format and the formats separated by pipes.
// @parm const CString | &fileName | initial filename (default "")<nl>
// The initial filetype is determined from this filename if given.
// @xref <c CFileExportDialog>
//****************************************************************************
// @prog
// Anneke Sicherer-Roetman
// @revs
// 22-03-1999 - First implementation
//****************************************************************************
// @todo
//****************************************************************************
CFileExportDialog::CFileExportDialog(BOOL bOpenFileDialog, // TRUE for FileOpen, FALSE for FileSaveAs
LPCTSTR lpszDefExt,
LPCTSTR lpszFileName,
DWORD dwFlags,
LPCTSTR lpszFilter,
CWnd* pParentWnd) :
base(bOpenFileDialog, lpszDefExt, lpszFileName, dwFlags, lpszFilter, pParentWnd),
// if filter is "" (not NULL), an extension is added automatically!
m_pTitleBuffer(NULL),
m_pFilterBuffer(NULL),
m_pFileBuffer(NULL),
m_CurrentFilterIndex(1)
{
// set dialog title
// m_pTitleBuffer = newdup(title);
// m_ofn.lpstrTitle = m_pTitleBuffer;
CString filter(lpszFilter);
CString fileName(lpszFileName);
// construct filter string for standard file open dialog
char *tempBuffer = newdup(filter);
char *word[40]; // maximum of 40 file types
// split original filter string on pipes
int n = Split(tempBuffer,word,20,'|');
char **fptr = new char *[n]; // note: pointers into tempBuffer
// create new filter string
m_pFilterBuffer = new char[filter.GetLength()+n*8+1];
m_pFilterBuffer[0]='\0';
// fill new filter string
for (int i = 0; i < n; ++i) {
// copy format description and add pipe
strcat(m_pFilterBuffer,word[i]);
strcat(m_pFilterBuffer,"|");
// extract filter from format description
char *part1[2];
int m = Split(word[i],part1,2,'(');
ASSERT(m == 2);
char *part2[2];
m = Split(part1[1],part2,2,')');
ASSERT((m == 1 || m == 2) && !strncmp(part2[0],"*.",2));
// add filter and add pipe
strcat(m_pFilterBuffer,part2[0]);
strcat(m_pFilterBuffer,"|");
// remember filter for later usage
fptr[i] = part2[0]+1;
}
// replace pipes by nul characters
int l = strlen(m_pFilterBuffer);
for (int i = 0; i < l; ++i)
if (m_pFilterBuffer[i] == '|')
m_pFilterBuffer[i] = '\0';
// set filter string
m_ofn.lpstrFilter = m_pFilterBuffer;
// set default filename in dialog
m_pFileBuffer = new char[256];
m_ofn.lpstrFile = m_pFileBuffer;
m_ofn.nMaxFile = 256;
if (fileName.IsEmpty()) {
sprintf(m_pFileBuffer, "*%s",fptr[0]);
} else {
strcpy(m_pFileBuffer, fileName);
}
// set filter index from default filename
m_ofn.nFilterIndex = m_CurrentFilterIndex = 1;
if (fileName.IsEmpty()) {
} else {
const char *ext = strchr(LPCSTR(fileName),'.');
if (ext) {
for (int i = 0; i < n; ++i)
if (!strcmp(ext, fptr[i])) {
m_ofn.nFilterIndex = m_CurrentFilterIndex = i + 1;
break;
}
}
}
// free temporary buffers
delete tempBuffer;
delete [] fptr;
}
....
FileExportDialog.h的头文件:
Header file of FileExportDialog.h:
//****************************************************************************
// N O L D U S I N F O R M A T I O N T E C H N O L O G Y B . V .
//****************************************************************************
// Filename: CFileExportDialog.h
// Project: EthoVision
// Module: Visualization
// Programmer: Anneke Sicherer-Roetman
// Version: 1.00
// Revision Date: 22-03-1999
//****************************************************************************
// Description: Declaration of class CFileExportDialog
//****************************************************************************
// Revision history:
// 22-03-1999 - First implementation
//****************************************************************************
// Bugs: ........
//****************************************************************************
// @doc
//****************************************************************************
#if !defined(AFX_NCFileExportDialog_H__BAABDC84_DDDA_11D2_A614_0060085FE616__INCLUDED_)
#define AFX_NCFileExportDialog_H__BAABDC84_DDDA_11D2_A614_0060085FE616__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
//****************************************************************************
// @class CFileExportDialog |
// File save dialog with automatic change of extension<nl>
// This dialog changes the extension in the filename field
// in concert with the chosen file type.<nl>
// The initial filetype is determined from the default filename, if given.<nl>
// Otherwise the first filetype in the filter string is used.
// @base public | CFileDialog
//****************************************************************************
// @ex
// This shows how to call the export dialog from your application: |
//
// CFileExportDialog dialog("Export graphics file",
// "Windows Bitmap (*.bmp)|JPEG Compressed Image (*.jpg)","visualization.jpg");
//
// if (dialog.DoModal() == IDOK) {
// CString filename = dialog.GetPathName();
// int filetype = dialog.GetFilterIndex();
// SaveFile(filename, filetype);
// }
//****************************************************************************
// @prog
// Anneke Sicherer-Roetman
// @revs
// 22-03-1999 - First implementation
//****************************************************************************
// @todo
//****************************************************************************
#define FILEEXPORTDIALOG_BASECLASS CFileDialog
class CFileExportDialog : public FILEEXPORTDIALOG_BASECLASS
{
typedef FILEEXPORTDIALOG_BASECLASS base;
DECLARE_DYNAMIC(CFileExportDialog)
// @access Public Member Functions and Variables
public:
// @cmember
// constructor, creates dialog title and filter buffers
CFileExportDialog(BOOL bOpenFileDialog, // TRUE for FileOpen, FALSE for FileSaveAs
LPCTSTR lpszDefExt = NULL,
LPCTSTR lpszFileName = NULL,
DWORD dwFlags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
LPCTSTR lpszFilter = NULL,
CWnd* pParentWnd = NULL);
// @cmember
// destructor, destroys dialog title and filter buffers
virtual ~CFileExportDialog();
// @cmember,mfunc
// return current filter index (useful if two file formats have same extension)
int GetFilterIndex() const { return m_CurrentFilterIndex; }
// @access Protected Member Functions and Variables
protected:
// @cmember
// called when user selects other filetype, changes extension
virtual void OnTypeChange();
//{{AFX_MSG(CFileExportDialog)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
// @access Private Member Functions and Variables
private:
char *m_pTitleBuffer; // @cmember contains title string
char *m_pFilterBuffer; // @cmember contains filter string
char *m_pFileBuffer; // @cmember contains filename string
int m_CurrentFilterIndex; // @cmember current file type
};
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_NCFileExportDialog_H__BAABDC84_DDDA_11D2_A614_0060085FE616__INCLUDED_)
然后进入"dlgfile.cpp"文件的DoModal()并挂在这里:
Then goes into DoModal() of "dlgfile.cpp" file and hangs here:
INT_PTR CFileDialog::DoModal()
{
ASSERT_VALID(this);
ASSERT(m_ofn.Flags & OFN_ENABLEHOOK);
ASSERT(m_ofn.lpfnHook != NULL); // can still be a user hook
// zero out the file buffer for consistent parsing later
ASSERT(AfxIsValidAddress(m_ofn.lpstrFile, m_ofn.nMaxFile));
DWORD nOffset = lstrlen(m_ofn.lpstrFile)+1;
ASSERT(nOffset <= m_ofn.nMaxFile);
memset(m_ofn.lpstrFile+nOffset, 0, (m_ofn.nMaxFile-nOffset)*sizeof(TCHAR));
// This is a special case for the file open/save dialog,
// which sometimes pumps while it is coming up but before it has
// disabled the main window.
HWND hWndFocus = ::GetFocus();
BOOL bEnableParent = FALSE;
m_ofn.hwndOwner = PreModal();
AfxUnhookWindowCreate();
if (m_ofn.hwndOwner != NULL && ::IsWindowEnabled(m_ofn.hwndOwner))
{
bEnableParent = TRUE;
::EnableWindow(m_ofn.hwndOwner, FALSE);
}
_AFX_THREAD_STATE* pThreadState = AfxGetThreadState();
ASSERT(pThreadState->m_pAlternateWndInit == NULL);
if (m_bVistaStyle == TRUE)
{
AfxHookWindowCreate(this);
}
else if (m_ofn.Flags & OFN_EXPLORER)
pThreadState->m_pAlternateWndInit = this;
else
AfxHookWindowCreate(this);
INT_PTR nResult = 0;
if (m_bVistaStyle == TRUE)
{
ApplyOFNToShellDialog();
// HERE CALLS **OPENFILENAME& CFileDialog::GetOFN()** method and then hangs
HRESULT hr = (static_cast<IFileDialog*>(m_pIFileDialog))->Show(m_ofn.hwndOwner);
nResult = (hr == S_OK) ? IDOK : IDCANCEL;
}
else if (m_bOpenFileDialog)
nResult = ::AfxCtxGetOpenFileName(&m_ofn);
else
nResult = ::AfxCtxGetSaveFileName(&m_ofn);
if (nResult)
ASSERT(pThreadState->m_pAlternateWndInit == NULL);
pThreadState->m_pAlternateWndInit = NULL;
// Second part of special case for file open/save dialog.
if (bEnableParent)
::EnableWindow(m_ofn.hwndOwner, TRUE);
if (::IsWindow(hWndFocus))
::SetFocus(hWndFocus);
PostModal();
return nResult ? nResult : IDCANCEL;
}
推荐答案
DoModal很好，请相信我.
请在执行初始化的地方发布代码，然后调用DoModal.
DoModalis fine, trust me.
Please post your code where your doing the initialization and then callingDoModal.
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