CFileDialog怎么实现目录的选择？

Question

想实现目录的选择。
就是选择的目录显示在编辑框中。

Answer 1

//如下实现
CString strTmpPath;
int CALLBACK BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData)
{
TCHAR szDir[MAX_PATH];
switch(uMsg){
case BFFM_INITIALIZED:
if (lpData){
strcpy(szDir, strTmpPath.GetBuffer(strTmpPath.GetLength()));
SendMessage(hwnd,BFFM_SETSELECTION,TRUE,(LPARAM)szDir);
}
break;
case BFFM_SELCHANGED: {
   if (SHGetPathFromIDList((LPITEMIDLIST) lParam ,szDir)){
  SendMessage(hwnd,BFFM_SETSTATUSTEXT,0,(LPARAM)szDir);
   }
   break;
}
default:
   break;
}
         
return 0;
}BOOL GetFolder(CString* strSelectedFolder,
   const char* lpszTitle,
   const HWND hwndOwner, 
   const char* strRootFolder, 
   const char* strStartFolder)
{
char pszDisplayName[MAX_PATH];
LPITEMIDLIST lpID;
BROWSEINFOA bi;

bi.hwndOwner = hwndOwner;
if (strRootFolder == NULL){
bi.pidlRoot = NULL;
}else{
   LPITEMIDLIST  pIdl = NULL;
   IShellFolder* pDesktopFolder;
   char          szPath[MAX_PATH];
   OLECHAR       olePath[MAX_PATH];
   ULONG         chEaten;
   ULONG         dwAttributes;    strcpy(szPath, (LPCTSTR)strRootFolder);
   if (SUCCEEDED(SHGetDesktopFolder(&pDesktopFolder)))
   {
   MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, szPath, -1, olePath, MAX_PATH);
   pDesktopFolder->ParseDisplayName(NULL, NULL, olePath, &chEaten, &pIdl, &dwAttributes);
   pDesktopFolder->Release();
   }
   bi.pidlRoot = pIdl;
}
bi.pszDisplayName = pszDisplayName;
bi.lpszTitle = lpszTitle;
bi.ulFlags = BIF_RETURNONLYFSDIRS | BIF_STATUSTEXT;
bi.lpfn = BrowseCallbackProc;
if (strStartFolder == NULL){
bi.lParam = FALSE;
}else{
strTmpPath.Format("%s", strStartFolder);
bi.lParam = TRUE;
}
bi.iImage = NULL;
lpID = SHBrowseForFolderA(&bi);
if (lpID != NULL){
BOOL b = SHGetPathFromIDList(lpID, pszDisplayName);
if (b == TRUE){
strSelectedFolder->Format("%s",pszDisplayName);
return TRUE;
}
}else{
strSelectedFolder->Empty();
}
return FALSE;
}//CGetFolderDlg为对话框程序主窗口类
void CGetFolderDlg::OnGetfolder() 
{
CString strFolderPath;
if (GetFolder(&strFolderPath, "Sample of  getting folder.", this->m_hWnd, NULL, NULL))
{
if (!strFolderPath.IsEmpty())
{
//strFolderPath便是
}
}
}

Answer 2

CFileDialog中有一个OPENFILENAME类型的成员m_ofn
设置m_ofn各个域的值可以对CFileDialog的行为作出各种各样的修改
比如：设置缺省目录：CFileDialog openfile(true,"dat","d:\pcm\pcm1.dat");
openfile.m_ofn.lpstrInitialDir = "d;\pcm\";
openfile.DoModal();