嗨我已经将VC 6项目转换为VC 2010,并且在显示模态打开文件对话框时我一直遇到错误 .
它显示对话框的底部但顶部缺失,也未填充过滤器 .
header具有用于存储文件信息的公共成员:
CString m_strFilePathName;
CString m_strFileExtName;
我的代码显示对话框:
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, NULL, "", OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, szFilter);
//"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;
// Dialog hangs on this line:
if(fd.DoModal() != IDOK) return;
诊断报告: First-chance exception at 0x006c69cc in AliEditor.exe: 0xC0000005: Access violation reading location 0x00000020.
在挂起模式下断开调用堆栈返回此信息:
user32.dll!_NtUserWaitMessage@0() + 0x15 bytes <-STOPPED HERE
user32.dll!_NtUserWaitMessage@0() + 0x15 bytes
user32.dll!_DialogBox2@16() + 0x109 bytes
user32.dll!_InternalDialogBox@24() + 0xc9 bytes
user32.dll!_DialogBoxIndirectParamAorW@24() + 0x36 bytes
user32.dll!_DialogBoxIndirectParamW@20() + 0x1b bytes
comdlg32.dll!CFileOpenSave::Show() + 0x146 bytes
AliEditor.exe!CFileDialog :: DoModal()第748行0x26字节C AliEditor.exe!CMainFrame :: OnFileOpen()第195行0xb字节C AliEditor.exe!AfxDispatchCmdMsg(CCmdTarget * pTarget,unsigned int nID,int nCode,void( void)* pfn,void * pExtra,unsigned int nSig,AFX_CMDHANDLERINFO * pHandlerInfo)第82行C AliEditor.exe!CCmdTarget :: OnCmdMsg(unsigned int nID,int nCode,void * pExtra,AFX_CMDHANDLERINFO * pHandlerInfo)第381行0x27字节C AliEditor .exe!CFrameWnd :: OnCmdMsg(unsigned int nID,int nCode,void * pExtra,AFX_CMDHANDLERINFO * pHandlerInfo)第973行0x18字节C AliEditor.exe!CWnd :: OnCommand(unsigned int wParam,long lParam)第2729行C AliEditor.exe !CFrameWnd :: OnCommand(unsigned int wParam,long lParam)Line 371 C AliEditor.exe!CWnd :: OnWndMsg(unsigned int message,unsigned int wParam,long lParam,long * pResult)2101行0x1e字节C AliEditor.exe!CWnd :: WindowProc(unsigned int message,unsigned int wParam,long lParam)Line 2087 0x20 bytes C AliEdit or.exe!AfxCallWndProc(CWnd * pWnd,HWND_ * hWnd,unsigned int nMsg,unsigned int wParam,long lParam)第257行0x1c字节C AliEditor.exe!AfxWndProc(HWND__ * hWnd,unsigned int nMsg,unsigned int wParam,long lParam )420 C线
我猜的声明(我不是C开发人员)覆盖(fileDlg.cpp):
#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()
文件“dlgfile.cpp”非常大,但这只是顶部:
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.
#include "stdafx.h"
#include <dlgs.h> // for standard control IDs for commdlg
#include "afxglobals.h"
#define new DEBUG_NEW
////////////////////////////////////////////////////////////////////////////
// FileOpen/FileSaveAs common dialog helper
CFileDialog::CFileDialog(BOOL bOpenFileDialog,
LPCTSTR lpszDefExt, LPCTSTR lpszFileName, DWORD dwFlags,
LPCTSTR lpszFilter, CWnd* pParentWnd, DWORD dwSize, BOOL bVistaStyle)
: CCommonDialog(pParentWnd)
{
OSVERSIONINFO vi;
ZeroMemory(&vi, sizeof(OSVERSIONINFO));
vi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
::GetVersionEx(&vi);
// if running under Vista
if (vi.dwMajorVersion >= 6)
{
m_bVistaStyle = bVistaStyle;
}
else
{
m_bVistaStyle = FALSE;
}
m_bPickFoldersMode = FALSE;
// determine size of OPENFILENAME struct if dwSize is zero
if (dwSize == 0)
{
dwSize = sizeof(OPENFILENAME);
}
// size of OPENFILENAME must be at least version 5
ASSERT(dwSize >= sizeof(OPENFILENAME));
// allocate memory for OPENFILENAME struct based on size passed in
m_pOFN = static_cast<LPOPENFILENAME>(malloc(dwSize));
ASSERT(m_pOFN != NULL);
if (m_pOFN == NULL)
AfxThrowMemoryException();
memset(&m_ofn, 0, dwSize); // initialize structure to 0/NULL
m_szFileName[0] = '\0';
m_szFileTitle[0] = '\0';
m_pofnTemp = NULL;
m_bOpenFileDialog = bOpenFileDialog;
m_nIDHelp = bOpenFileDialog ? AFX_IDD_FILEOPEN : AFX_IDD_FILESAVE;
m_ofn.lStructSize = dwSize;
m_ofn.lpstrFile = m_szFileName;
m_ofn.nMaxFile = _countof(m_szFileName);
m_ofn.lpstrDefExt = lpszDefExt;
m_ofn.lpstrFileTitle = (LPTSTR)m_szFileTitle;
m_ofn.nMaxFileTitle = _countof(m_szFileTitle);
m_ofn.Flags |= dwFlags | OFN_ENABLEHOOK | OFN_EXPLORER;
if(dwFlags & OFN_ENABLETEMPLATE)
m_ofn.Flags &= ~OFN_ENABLESIZING;
m_ofn.hInstance = AfxGetResourceHandle();
m_ofn.lpfnHook = (COMMDLGPROC)_AfxCommDlgProc;
// setup initial file name
if (lpszFileName != NULL)
Checked::tcsncpy_s(m_szFileName, _countof(m_szFileName), lpszFileName, _TRUNCATE);
// Translate filter into commdlg format (lots of \0)
if (lpszFilter != NULL)
{
m_strFilter = lpszFilter;
LPTSTR pch = m_strFilter.GetBuffer(0); // modify the buffer in place
// MFC delimits with '|' not '\0'
while ((pch = _tcschr(pch, '|')) != NULL)
*pch++ = '\0';
m_ofn.lpstrFilter = m_strFilter;
// do not call ReleaseBuffer() since the string contains '\0' characters
}
if (m_bVistaStyle == TRUE)
{
if (SUCCEEDED(CoInitializeEx(NULL, COINIT_APARTMENTTHREADED)))
{ // multi-threaded is not supported
IFileDialog* pIFileDialog;
IFileDialogCustomize* pIFileDialogCustomize;
HRESULT hr;
USE_INTERFACE_PART_STD(FileDialogEvents);
USE_INTERFACE_PART_STD(FileDialogControlEvents);
if (m_bOpenFileDialog)
{
hr = CoCreateInstance(CLSID_FileOpenDialog, NULL, CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&pIFileDialog));
}
else
{
hr = CoCreateInstance(CLSID_FileSaveDialog, NULL, CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&pIFileDialog));
}
if (FAILED(hr))
{
m_bVistaStyle = FALSE;
return;
}
hr = pIFileDialog->QueryInterface(IID_PPV_ARGS(&pIFileDialogCustomize));
ENSURE(SUCCEEDED(hr));
hr = pIFileDialog->Advise(reinterpret_cast<IFileDialogEvents*>(&m_xFileDialogEvents), &m_dwCookie);
ENSURE(SUCCEEDED(hr));
m_pIFileDialog = static_cast<void*>(pIFileDialog);
m_pIFileDialogCustomize = static_cast<void*>(pIFileDialogCustomize);
}
else
{
m_bVistaStyle = FALSE;
}
}
}
CFileDialog::~CFileDialog()
{
free(m_pOFN);
if (m_bVistaStyle == TRUE)
{
HRESULT hr;
hr = (static_cast<IFileDialog*>(m_pIFileDialog))->Unadvise(m_dwCookie);
ENSURE(SUCCEEDED(hr));
(static_cast<IFileDialogCustomize*>(m_pIFileDialogCustomize))->Release();
(static_cast<IFileDialog*>(m_pIFileDialog))->Release();
CoUninitialize();
}
}
const OPENFILENAME& CFileDialog::GetOFN() const
{
return *m_pOFN;
}
OPENFILENAME& CFileDialog::GetOFN()
{
return *m_pOFN;
}
一步一步走到同一个(“dlgfile.cpp”)文件中的这一点:
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;
}
谁能帮助我?
[更新]由于现阶段没有人可以帮助我,我已将项目上传到公共场所here . 当我点击打开文件时,任何人都可以下载并告诉我出了什么问题吗?
1 回答
我能看到的唯一问题是你的过滤字符串看起来不正确 . 看起来您的代码基于MSDN示例之一 . 根据该示例,您的szFilter应如下所示:
仅供参考我使用http://msdn.microsoft.com/en-US/library/wh5hz49d(v=vs.100).aspx作为参考 .
[更新]
我创建了一个小型MFC应用程序并粘贴在您的代码中 . 您的代码示例中存在拼写错误 . 该类是CFileDialog,而不是CFileDlg . 我修复它,然后应用上述更改来修复szFilter字符串 . 这个对我有用 . 显示文件对话框,我输入一些数据并关闭文件对话框 . 没有访问冲突,没有断言 . 我认为您需要查看代码中的其他位置以跟踪问题 .
[更新2]
忽略我之前说的一切 . 您的原始访问冲突是在FileExportDialog.cpp的第174行附近
真正的调用堆栈是:
该程序在CWnd :: GetDlgItem崩溃,因为CWnd“this”指针为0.这是因为CFileExportDialog :: OnTypeChange的第一行是GetParent(),它是NULL,因为该对话框没有父对象 .
CFileExportDialog类不是Visual Studio的一部分,它似乎基于1999年从http://www.codeguru.com/cpp/w-d/dislog/commondialogs/article.php/c1863/CFileExportDialog-Class.htm编写的一些公共域代码 . 看起来OnTypeChange的实现基于原始开发人员对1999年实现的Microsoft CFileDialog类的详细信息进行逆向工程 . 我猜测VS 2010中的内部结构发生了变化,因此类不再有用 .
下次运行该程序时,在FileExportDialog.cpp的第177行设置断点 . 当您点击断点时,单步执行代码并观察崩溃并断言,因为过时的代码尝试执行它本来应该从未做过的事情 .
建议您转储CFileExportDialog类并使用标准MFC CFileDialog类重写您的程序 .