怎么能用CFileDialog类打开一个选择目录的Dialog???

[leonchen]

如题。
不要告诉我先打开，然后Get.....

[timefg]

我在乡下，你看怎么办，呵呵

[youyou]

想当初我可是花了50分问来的，今天便宜了。
BROWSEINFO bi;
TCHAR szDisplayName[MAX_PATH];
LPITEMIDLIST pidl;
LPMALLOC pMalloc = NULL;

ZeroMemory(&bi, sizeof(bi));
bi.hwndOwner = GetSafeHwnd();
bi.pszDisplayName = szDisplayName;
bi.lpszTitle = TEXT("Please select a folder:");
bi.ulFlags = BIF_RETURNONLYFSDIRS;
pidl = SHBrowseForFolder(&bi);
CString sPath;
if (pidl)
{
SHGetPathFromIDList(pidl, szDisplayName); // set the directory name.
sPath = szDisplayName; // m_sPath是CString變量，最後結果在這兒。
}
}

[eggplant]

能不能不用CFileDialog，用一个别的：如下// FolderDialog.h: interface for the CFolderDialog class.
// $Copyright ?1998, Kenneth M. Reed, All Rights Reserved. $
// $Header: FolderDialog.h Revision:1.11 Mon Apr 06 12:04:50 1998 KenReed $

#ifndef _CFolderDialog_
#define _CFolderDialog_

#include <shlobj.h>

class CFolderDialog
{
friend static int CALLBACK BrowseDirectoryCallback(
HWND hWnd, UINT uMsg, LPARAM lParam, LPARAM lpData);

public:
CFolderDialog( LPCTSTR lpszFolderName = NULL,
DWORD dwFlags = NULL/*BIF_RETURNONLYFSDIRS*/,
CWnd* pParentWnd = NULL);
virtual ~CFolderDialog();
virtual int DoModal();
CString GetPathName() const;

protected:
virtual void OnInitDialog();
virtual void OnSelChanged(ITEMIDLIST* pIdl);
virtual void CallbackFunction(HWND hWnd, UINT uMsg, LPARAM lParam);

void EnableOK(BOOL bEnable = TRUE);
void SetSelection(LPCTSTR pszSelection);
void SetSelection(ITEMIDLIST* pIdl);
void SetStatusText(LPCTSTR pszStatusText);
CString ShortName(const CString& strName);

public:
BROWSEINFO m_bi;

protected:
CString m_strInitialFolderName;
CString m_strFinalFolderName;

TCHAR m_szDisplayName[MAX_PATH];
TCHAR m_szPath[MAX_PATH];

HWND m_hDialogBox;


};

#endif // _CFolderDialog_
///////////////////////////////////////////////
// FolderDialog.cpp: implementation of the CFolderDialog class.
// $Copyright ? 1991-1998 Quma Software, Inc. ALL RIGHTS RESERVED. $
// $Header: FolderDialog.cpp Revision:1.11 Tue Jun 23 18:00:44 1998 KenReed $

#include "stdafx.h"
#include "FolderDialog.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
static int CALLBACK BrowseDirectoryCallback(
HWND hWnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
// Context was pointer to CFolderDialog instance
CFolderDialog* pFd = (CFolderDialog*)lpData;

// Let the class handle it
pFd->CallbackFunction(hWnd, uMsg, lParam);

// Always return 0 as per SHBrowseFolder spec
return 0;
}

CFolderDialog::CFolderDialog(LPCTSTR lpszFolderName, DWORD dwFlags, CWnd* pParentWnd)
{
// Use the supplied initial folder if non-null.
if (lpszFolderName == NULL)
m_strInitialFolderName = _T("");
else
m_strInitialFolderName = lpszFolderName;

memset(&m_bi, '\0', sizeof(BROWSEINFO));

if (pParentWnd == NULL)
m_bi.hwndOwner = 0;
else
m_bi.hwndOwner = pParentWnd->GetSafeHwnd();

// Fill in the rest of the structure
m_bi.pidlRoot = NULL;
m_bi.pszDisplayName = m_szDisplayName;
m_bi.lpszTitle = _T("当前选中的目录：");
m_bi.ulFlags = dwFlags | BIF_STATUSTEXT;
m_bi.lpfn = BrowseDirectoryCallback;
m_bi.lParam = (LPARAM)this;

}

CFolderDialog::~CFolderDialog()
{

}

void CFolderDialog::CallbackFunction(HWND hWnd, UINT uMsg, LPARAM lParam)
{
// Save the window handle. The Set* functions need it and they may
// be called by the virtual funtions.
m_hDialogBox = hWnd;

// Dispatch the two message types to the virtual functions
switch (uMsg)
{
case BFFM_INITIALIZED:
OnInitDialog();
break;
case BFFM_SELCHANGED:
OnSelChanged((ITEMIDLIST*) lParam);
break;
}
}

int CFolderDialog::DoModal()
{
int nReturn = IDOK;

// initialize the result to the starting folder value
m_strFinalFolderName = m_strInitialFolderName;

ITEMIDLIST* piid = NULL;

// call the shell function
piid = ::SHBrowseForFolder(&m_bi);

// process the result
if (piid && ::SHGetPathFromIDList(piid, m_szPath))
{
m_strFinalFolderName = m_szPath;
nReturn = IDOK;
}
else
{
nReturn = IDCANCEL;
}

// Release the ITEMIDLIST if we got one
if (piid)
{
LPMALLOC lpMalloc;
VERIFY(::SHGetMalloc(&lpMalloc) == NOERROR);
lpMalloc->Free(piid);
lpMalloc->Release();
}

return nReturn;
}

CString CFolderDialog::GetPathName() const
{
return m_strFinalFolderName;
}

void CFolderDialog::EnableOK(BOOL bEnable)
{
// Documentation is incorrect! It is the lParam, not the wParam, that
// controls the enable!
//::SendMessage(m_hDialogBox, BFFM_ENABLEOK, (bEnable ? 1 : 0), 0);
::SendMessage(m_hDialogBox, BFFM_ENABLEOK, 0, (bEnable ? 1 : 0));
}

void CFolderDialog::SetSelection(LPCTSTR pszSelection)
{
::SendMessage(m_hDialogBox, BFFM_SETSELECTION, TRUE, (LPARAM) pszSelection);
}

void CFolderDialog::SetSelection(ITEMIDLIST* pIdl)
{
::SendMessage(m_hDialogBox, BFFM_SETSELECTION, FALSE, (LPARAM) pIdl);
}

void CFolderDialog::SetStatusText(LPCTSTR pszStatusText)
{
::SendMessage(m_hDialogBox, BFFM_SETSTATUSTEXT, 0, (LPARAM) pszStatusText);
}

CString CFolderDialog::ShortName(const CString& strName)
{
CString strShort;
if (strName.GetLength() <= 35)
strShort = strName;
else
strShort = strName.Left(35) + _T("...");

return strShort;
}

void CFolderDialog::OnInitDialog()
{
// Default handing of the init dialog message sets the selection to
// the initial folder
SetSelection(m_strInitialFolderName);
SetStatusText(ShortName(m_strInitialFolderName));
}

void CFolderDialog::OnSelChanged(ITEMIDLIST* pIdl)
{
::SHGetPathFromIDList(pIdl, m_szPath);
m_strFinalFolderName = m_szPath;
SetStatusText(ShortName(m_strFinalFolderName));
}

[leonchen]

挥泪大甩卖呀！
现在DHL可以邮寄考肉吧，我给你邮寄去好不好。
多谢拉各位！如果真的想吃就说出你们在什么地方我好安排

[youyou]

eggplant(拉拉)老兄，佩服！！为了一个对话框写了一个类。厉害！

[Smile_Tiger]

在C++中，派生是解决特殊要求的重要手段

虽然看起来很麻烦，但是很清晰

[youyou]

我是真的佩服。
我就没有这个耐心。

[leonchen]

哎呀，写程序的大多都是臭男人。哪有几个会玩绣花针的。

[timefg]

CFileDialog m_mydia(TRUE,NULL,NULL,OFN_HIDEREADONLY,NULL,NULL);
m_mydia.Domodal();

[leonchen]

CFileDialog m_mydia(TRUE,NULL,NULL,OFN_HIDEREADONLY,NULL,NULL);
m_mydia.Domodal();
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
你这个是什么意思？打开一个选择文件的东东然后在截取路径是吧。我早也考虑过，但如果文件夹是空的怎么办。所以才贴的。

[timefg]

什么文件夹为空？空文件夹也可以的呀。创建一个CFileDialog的对象，然后生成。你实验一下，怎么不可以？

[timefg]

空文件夹里面没有文件，怎么打开文件？是打开不了文件的呀！

[leonchen]

对呀，我正要问你呢。
打开不了文件怎么取路径

[frankzhai]

Please take a look at these two articles

http://support.microsoft.com/support/kb/articles/Q105/4/97.asp
http://support.microsoft.com/support/kb/articles/Q195/0/34.asp

[tlovexyj]

////////////////////////////////////////////////////////////////////////
// DirDialog.h: interface for the CDirDialog class.
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_DIRDIALOG_H__62FFAC92_1DEE_11D1_B87A_0060979CDF6D__INCLUDED_)
#define AFX_DIRDIALOG_H__62FFAC92_1DEE_11D1_B87A_0060979CDF6D__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

class CDirDialog
{
public:

CDirDialog();
virtual ~CDirDialog();

BOOL DoBrowse(CWnd *pwndParent = NULL);

CString m_strWindowTitle;
CString m_strPath;
CString m_strInitDir;
CString m_strSelDir;
CString m_strTitle;
int m_iImageIndex;
BOOL m_bStatus;

private:
virtual BOOL SelChanged(LPCSTR lpcsSelection, CString& csStatusText) { return TRUE; };
static int __stdcall CDirDialog::BrowseCtrlCallback(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData);
};

#endif // !defined(AFX_DIRDIALOG_H__62FFAC92_1DEE_11D1_B87A_0060979CDF6D__INCLUDED_)




///////////////////////////////////////////////////////////////////////////
// DirDialog.cpp: implementation of the CDirDialog class.
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "DirDialog.h"
#include "shlobj.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

// Callback function called by SHBrowseForFolder's browse control
// after initialization and when selection changes
int __stdcall CDirDialog::BrowseCtrlCallback(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
CDirDialog* pDirDialogObj = (CDirDialog*)lpData;
pDirDialogObj->m_strPath.Empty();
if (uMsg == BFFM_INITIALIZED )
{
if( ! pDirDialogObj->m_strSelDir.IsEmpty() )
::SendMessage(hwnd, BFFM_SETSELECTION, TRUE, (LPARAM)(LPCTSTR)(pDirDialogObj->m_strSelDir));
if( ! pDirDialogObj->m_strWindowTitle.IsEmpty() )
::SetWindowText(hwnd, (LPCTSTR) pDirDialogObj->m_strWindowTitle);
}
else if( uMsg == BFFM_SELCHANGED )
{
LPITEMIDLIST pidl = (LPITEMIDLIST) lParam;
char selection[MAX_PATH];
if( ! ::SHGetPathFromIDList(pidl, selection) )
selection[0] = '\0';

CString csStatusText;
BOOL bOk = pDirDialogObj->SelChanged(selection, csStatusText);

if( pDirDialogObj->m_bStatus )
::SendMessage(hwnd, BFFM_SETSTATUSTEXT , 0, (LPARAM)(LPCSTR)csStatusText);

::SendMessage(hwnd, BFFM_ENABLEOK, 0, bOk);
}
else if( uMsg == BFFM_VALIDATEFAILED )
{
CString path;
path = (char *)lParam;
if(path[path.GetLength()-1]!='\\') path+='\\';
if(!IsCharAlpha(path[0]) || path[1]!=':' || path[2]!='\\')
{
CString tmp;
tmp = "c:\\";
tmp+=path;
path=tmp;
}
pDirDialogObj->m_strPath = path;
}
return 0;
}

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CDirDialog::CDirDialog()
{
m_bStatus = FALSE;
}

CDirDialog::~CDirDialog()
{
}

BOOL CDirDialog::DoBrowse(CWnd *pwndParent)
{

if( ! m_strSelDir.IsEmpty() )
{
m_strSelDir.TrimRight();
if( m_strSelDir.Right(1) == "\\" || m_strSelDir.Right(1) == "//" )
m_strSelDir = m_strSelDir.Left(m_strSelDir.GetLength() - 1);
}

LPMALLOC pMalloc;
if (SHGetMalloc (&pMalloc)!= NOERROR)
return FALSE;

BROWSEINFO bInfo;
LPITEMIDLIST pidl;
ZeroMemory ( (PVOID) &bInfo,sizeof (BROWSEINFO));

if (!m_strInitDir.IsEmpty ())
{
OLECHAR olePath[MAX_PATH];
ULONG chEaten;
ULONG dwAttributes;
HRESULT hr;
LPSHELLFOLDER pDesktopFolder;
//
// Get a pointer to the Desktop's IShellFolder interface.
//
if (SUCCEEDED(SHGetDesktopFolder(&pDesktopFolder)))
{
//
// IShellFolder::ParseDisplayName requires the file name be in Unicode.
//
MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, m_strInitDir.GetBuffer(MAX_PATH), -1,
olePath, MAX_PATH);

m_strInitDir.ReleaseBuffer (-1);
//
// Convert the path to an ITEMIDLIST.
//
hr = pDesktopFolder->ParseDisplayName(NULL,
NULL,
olePath,
&chEaten,
&pidl,
&dwAttributes);
if (FAILED(hr))
{
pMalloc ->Free (pidl);
pMalloc ->Release ();
return FALSE;
}
bInfo.pidlRoot = pidl;

}
}
bInfo.hwndOwner = pwndParent == NULL ? NULL : pwndParent->GetSafeHwnd();
bInfo.pszDisplayName = m_strPath.GetBuffer (MAX_PATH);
bInfo.lpszTitle = (m_strTitle.IsEmpty()) ? "Open" : m_strTitle;
bInfo.ulFlags = BIF_RETURNFSANCESTORS |
BIF_RETURNONLYFSDIRS |
BIF_EDITBOX | BIF_VALIDATE |
(m_bStatus ? BIF_STATUSTEXT : 0);

bInfo.lpfn = BrowseCtrlCallback; // address of callback function
bInfo.lParam = (LPARAM)this; // pass address of object to callback function

m_strPath.ReleaseBuffer();
if ((pidl = ::SHBrowseForFolder(&bInfo)) == NULL)
{
if(m_strPath.IsEmpty()) return FALSE;
}
m_iImageIndex = bInfo.iImage;
CString s;
s= m_strPath;

if (::SHGetPathFromIDList(pidl, m_strPath.GetBuffer(MAX_PATH)) == FALSE)
{
if(m_strPath.IsEmpty())
{
pMalloc ->Free(pidl);
pMalloc ->Release();
return FALSE;
}
}

m_strPath.ReleaseBuffer();
if(!s.IsEmpty()) m_strPath = s;

pMalloc ->Free(pidl);
pMalloc ->Release();

return TRUE;
}


////////////////////////////////
//use it
////////////////////////////////
void CFolderPath::OnBrowse()
{
// TODO: Add your control notification handler code here
CDirDialog dlg;
dlg.m_strWindowTitle = "选择文件夹";
dlg.m_strTitle = "请选择文件夹\n路径:";
dlg.m_strSelDir="c:\\windows";
if(dlg.DoBrowse())
{
m_sPath = dlg.m_strPath;
bool bUpdate = true;

if(!SetCurrentDirectory(m_sPath))
{
CString msg;
msg.Format("文件夹\"%s\"并不存在.\n你要建立该文件夹吗?", m_sPath);
if(MessageBox(msg, "设置", MB_YESNO | MB_ICONQUESTION)==IDYES)
{
char *p=NULL;
int nPos=m_sPath.GetLength();
p=m_sPath.GetBuffer(nPos);
if( p[nPos-1]=='\\' )
p[nPos-1]='\0';
sMainPath = p;
m_sPath.ReleaseBuffer();
}
else bUpdate = false;
}
else
{
char *p=NULL;
int nPos=m_sPath.GetLength();
p=m_sPath.GetBuffer(nPos);
if( p[nPos-1]=='\\' )
p[nPos-1]='\0';
sMainPath = p;
m_sPath.ReleaseBuffer();
}
if(bUpdate)
{
UpdateData(false);
GetDlgItem(IDC_PATH)->SetFocus();
}
}
}

[leonchen]

又一个高手为了我这个问题写了一个类！！！
非常感谢！！

[clack]

感谢还不赶紧加分？呵呵

[feijunjun]

DirDialog类我都在用，好像是微软公司的成果吧……

[kukadu8]

请问在哪里可以留言？

[100_001]

如果要在CFileDialog（只显示目录）中选择目录该怎么做？

比如，从CFileDialog派生出一个类来。