如何实现一个选择文件夹的对话框？

[njust202]

如何实现一个选择文件夹的对话框？

[sans]

int CALLBACK BrowseCallbackProc(HWND hWnd,UINT msg,LPARAM lParam,LPARAM lpData)
{
if((msg & BFFM_INITIALIZED) == BFFM_INITIALIZED)
SetWindowText(hWnd,(char *)lpData);
return 0;
}

BOOL GetPath(HWND hWnd,char * szPath, char * szTitle, char * szDlgTitle)
{
BROWSEINFO bi;
LPITEMIDLIST lpi;

bi.hwndOwner = hWnd;
bi.pidlRoot = NULL;
bi.pszDisplayName = NULL;
bi.lpszTitle = szTitle;
bi.ulFlags = BIF_RETURNONLYFSDIRS|BIF_RETURNFSANCESTORS;
bi.lpfn = (BFFCALLBACK)BrowseCallbackProc;
bi.lParam = (LPARAM)szDlgTitle;
bi.iImage = 0;
lpi = SHBrowseForFolder(&bi);
if(lpi == NULL) return FALSE;

LPMALLOC pMalloc;
SHGetMalloc(&pMalloc);
SHGetPathFromIDList(lpi,szPath);
pMalloc->Free(lpi);
pMalloc->Release();
return TRUE;
}

[opentuxedo]

//h
class CDirDialog
{
public:
CDirDialog();
virtual ~CDirDialog();
int DoBrowse ();
CString m_strPath;
CString m_strInitDir;
CString m_strTitle;
int m_iImageIndex;
};

//cpp
CDirDialog::CDirDialog()
{////////////////////////////////////////////

}

CDirDialog::~CDirDialog()
{///////////////////////////////////////////

}

int CDirDialog::DoBrowse ()
{/////////////////////////////////////////

LPMALLOC pMalloc;
if (SHGetMalloc (&pMalloc)!= NOERROR)
{
return 0;
}

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 0;
}
bInfo.pidlRoot = pidl;
}
}
bInfo.hwndOwner = NULL;
bInfo.pszDisplayName = m_strPath.GetBuffer (MAX_PATH);
bInfo.lpszTitle = (m_strTitle.IsEmpty()) ? "Open":m_strTitle;
bInfo.ulFlags = BIF_RETURNFSANCESTORS|BIF_RETURNONLYFSDIRS;


if ((pidl = ::SHBrowseForFolder (&bInfo)) == NULL)
{
return 0;
}
m_strPath.ReleaseBuffer ();
m_iImageIndex = bInfo.iImage;

if (::SHGetPathFromIDList(pidl,m_strPath.GetBuffer (MAX_PATH)) == FALSE)
{
pMalloc ->Free (pidl);
pMalloc ->Release ();
return 0;
}

m_strPath.ReleaseBuffer ();

pMalloc ->Free (pidl);
pMalloc ->Release ();
return 1;
}

[xuying]

用SHBrowseForFolder()函数。

[nbgyf]

/*类似Explorer的文件选择列表*/
/*不是我写的是抄袭老外的，请见谅*/

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

#ifndef BFFM_VALIDATEFAILED
#ifndef UNICODE
#define BFFM_VALIDATEFAILED 3
#else
#define BFFM_VALIDATEFAILED 4
#endif
#endif //!BFFM_VALIDATEFAILED


// CFolderDialog

IMPLEMENT_DYNAMIC(CFolderDialog, CDialog)
CFolderDialog::CFolderDialog(LPCTSTR lpszTitle /*NULL*/,
LPCTSTR lpszFolderName /*NULL*/,
CWnd* pParentWnd /*NULL*/,
UINT uFlags /*BIF_RETURNONLYFSDIRS*/)
: CCommonDialog(pParentWnd)
, m_hWnd(NULL)
{
m_szSelectedPath[0] = '\0';
m_szFolderPath[0] = '\0';
m_szFolderDisplayName[0]= '\0';

if(lpszFolderName != NULL)
lstrcpy(m_szSelectedPath, lpszFolderName);

// Fill
::ZeroMemory(&m_bi, sizeof(BROWSEINFO));
m_bi.hwndOwner = pParentWnd->GetSafeHwnd();
m_bi.pidlRoot = NULL;
m_bi.pszDisplayName = m_szFolderDisplayName;
m_bi.lpszTitle = lpszTitle;
m_bi.ulFlags = uFlags;
m_bi.lpfn = BrowseCallbackProc;
m_bi.lParam = (LPARAM)this;
}

CFolderDialog::~CFolderDialog(void)
{
}

BEGIN_MESSAGE_MAP(CFolderDialog, CCommonDialog)
END_MESSAGE_MAP()

// CFolderDialog message handlers

int CFolderDialog::DoModal(void)
{
ASSERT_VALID(this);
ASSERT(m_bi.lpfn != NULL);

m_bi.hwndOwner = PreModal();
INT_PTR nRet = -1;
LPITEMIDLIST pItemIDList = ::SHBrowseForFolder(&m_bi);

if(pItemIDList != NULL)
{
if(::SHGetPathFromIDList(pItemIDList, m_szFolderPath))
{
IMalloc* pMalloc = NULL;
if(SUCCEEDED(::SHGetMalloc(&pMalloc)))
{
pMalloc->Free(pItemIDList);
pMalloc->Release();
}
nRet = IDOK;
}
else
{
nRet = IDCANCEL;
}
}
PostModal();
return nRet;
}

// Overridables:

void CFolderDialog::OnInitialized(void)
{
if(lstrlen(m_szSelectedPath))
SetSelection(m_szSelectedPath);
}

int CFolderDialog::OnValidateFailed(LPCTSTR lpstrFolderPath)
{
lpstrFolderPath="AAA";
int nRet = AfxMessageBox(_T("The path entered is not valid! Continue ?"),
MB_YESNO | MB_ICONQUESTION | MB_DEFBUTTON2);

// Return 1 = continue, 0 = EndDialog
return((nRet == IDYES) ? 0 : 1);
}

void CFolderDialog::OnSelChanged(LPITEMIDLIST /*pItemIDList*/)
{
}

// Callback function used with the SHBrowseForFolder function.

INT CALLBACK CFolderDialog::BrowseCallbackProc(HWND hWnd,
UINT uMsg, LPARAM lParam, LPARAM lpData)
{
CFolderDialog* pThis = (CFolderDialog*)(lpData);
pThis->m_hWnd = hWnd;
int nRet = 0;

switch(uMsg)
{
case BFFM_INITIALIZED:
pThis->OnInitialized();
break;
case BFFM_SELCHANGED:
pThis->OnSelChanged((LPITEMIDLIST)lParam);
break;
case BFFM_VALIDATEFAILED:
nRet = pThis->OnValidateFailed((LPCTSTR)lParam);
break;
}
pThis->m_hWnd = NULL;
return nRet;
}

[alickguo]

SDK我不懂 我就说个MFC实现吧
void CCPfileDlg::OnBrowns()
{

CFileDialog dlg(TRUE,"*.htm", "",
OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,
"超文本文件(.htm)|*.htm|超文本文件(.html)|*.html|文本文件(.txt)|*.txt|All Files (*.*)|*.*||", this);

dlg.m_ofn.lpstrTitle = "。。。添加文件。。。";

if (dlg.DoModal() == IDOK)
{
m_from = dlg.GetPathName();
UpdateData(FALSE);
}

}

[FFXI]

LPITEMIDLIST SHBrowseForFolder(
LPBROWSEINFO lpbi
);

typedef struct _browseinfo {
HWND hwndOwner;
LPCITEMIDLIST pidlRoot;
LPTSTR pszDisplayName;
LPCTSTR lpszTitle;
UINT ulFlags;
BFFCALLBACK lpfn;
LPARAM lParam;
int iImage;
} BROWSEINFO, *PBROWSEINFO, *LPBROWSEINFO;