SPDL： SHGetSpecialFolderLocation()、SHGetFileInfo()、SHGetPathFromIDList()函数

#include "shlobj.h" //包含头文件

函数介绍

1、WINSHELLAPI HRESULT WINAPI SHGetSpecialFolderLocation (HWND hwndOwner, int nFolder,LPITEMIDLIST * ppidl); //函数声明

hwndOwner: 指定了"所有者窗口",在调用这个函数是可能出現的对话框或信息框.

nFolder: 是一个整数id，決定哪个目录是待查找目录,它的取值可能是

CSIDL_BITBUCKET 回收站

CSIDL_CONTROLS 控制面板

CSIDL_DESKTOP Windows桌面desktop;

CSIDL_DESKTOPDIRECTORY desktop的目录；

CSIDL_DRIVES 我的电脑

CSIDL_FONTS 字体目录

CSIDL_NETHOOD 网上邻居

CSIDL_NETWORK 网上邻居virtual folder

CSIDL_PERSONAL 我的文档

CSIDL_PRINTERS 打印机

CSIDL_RECENT 最近打开文档

CSIDL_SENDTO 发送到菜单项

CSIDL_STARTMENU 快启菜单

CSIDL_STARTUP 启动目录

CSIDL_TEMPLATES 临时文档

ppidl: pidl地址. SHGetSpecialFolderLocation把地址写到pidl.

2、SHGetFileInfo

包含在文件#include"shellapi.h"

DWORD SHGetFileInfo( LPCTSTR pszPath,

DWORD dwFileAttributes,

SHFILEINFO FAR* psfi,

UINT cbFileInfo,

UINT uFlags);

SHGetFileInfo()函数提供关于文件系统对象的信息。这个对象可以是文件，文件夹，目录或驱动器根。DWORD的返回是指可能有相当多的返回状态，这与uFlags变量的设置有关。简单地说，使用这个函数，你可以期望：

确定可执行文件的目标平台(Win32，Win16，MS-DOS)

获取各种有特色的文件图标(小的，大的，有关联重叠的，选中的，打开的)

读出其它显示属性，如文件类型(显示在探测器类型列上的简短描述)和显示名(出现在名字列上)

读出任何其它属性，可以是文件特有的，如，是否可以拷贝，移动，删除或重命名，是否它可以形成一个快捷方式，它是否有子文件夹，是否是共享的，是拖拽目标，或有附加的属性页，等等。

3、SHGetPathFromIDList

从LPITEMIDLIST中获取文件路径



//这里给出的是项目中自己写的CDlgOpenSave类，显示我的桌面

void CDlgOpenSave::SetDeskTopList()

{

LPITEMIDLIST lpItemIDList;

SHFILEINFO shinfo;

ListItem LI;

LPWSTR szPath = new TCHAR[MAX_PATH];

DWORD dwType[4] = {CSIDL_RECENT, CSIDL_PERSONAL, CSIDL_DRIVES, CSIDL_DESKTOPDIRECTORY};

FILETYPE FT[4] = {F_RECENT, F_PERSONAL, F_COMPUTER, F_DESKTOP};

CString strDisplayName,strPath;

for (int i=0; i < 4; i++)

{

::SHGetSpecialFolderLocation(m_hWnd, dwType[i], &lpItemIDList);

::SHGetFileInfo((LPCTSTR)lpItemIDList,NULL, &shinfo, sizeof(shinfo),

SHGFI_SYSICONINDEX | SHGFI_DISPLAYNAME | SHGFI_ICON | SHGFI_SMALLICON | SHGFI_PIDL);

::SHGetPathFromIDList(lpItemIDList,szPath);

strDisplayName.Format(_T("%s"),shinfo.szDisplayName);

strPath.Format(_T("%s"), szPath);

if ( i == 3 )

{

m_strDesktop = strPath + _T("\");

m_nCurFolder = 0;

m_vFilePath.clear();

m_vFilePath.push_back(make_pair(m_strDesktop, F_DESKTOP));

ShowListContent(m_strDesktop,i);//显示桌面上的文件

delete[] szPath;

return;

}

if ( i== 2 )

{

strDisplayName = _T("我的电脑");

}

LI.strFileName = strDisplayName;

LI.strFilePath = strPath;

LI.dwFileType = FT[i];

OnNotifyShowListContent(strDisplayName, shinfo, i, LI);

}

delete[] szPath;

}

void CDlgOpenSave::ShowListContent(CString strPath, int nStartIndex)

{

int nFileType = m_pComFileType->GetCurSel();

CString strTypeName = _T("*.*");

if (nFileType > 0 && nFileType < (int)m_vFileType.size())

{

strTypeName = m_vFileType[nFileType];

}

CString strFullPath = strPath + strTypeName;

WIN32_FIND_DATA FindFileData;

int nlength = nStartIndex;

HANDLE hListFile = ::FindFirstFile((LPTSTR)(LPCTSTR)strFullPath, &FindFileData);

if (hListFile != INVALID_HANDLE_VALUE)

{

do

{

CString strFilePathName;

strFilePathName = strPath;

CString strFileName;

strFileName.Format(_T("%s"), FindFileData.cFileName);

strFilePathName += strFileName;

int nHide = (FindFileData.dwFileAttributes) & FILE_ATTRIBUTE_HIDDEN;//过滤隐藏属性

if (!nHide)

{

ShowFileToList(strPath, strFileName,nlength); //ShowFileToList接口

}

}while( ::FindNextFile(hListFile, &FindFileData) );

::FindClose(hListFile);

}

UpdateGobackBtnState();

}

//根据路径将打开的文件显示在对话框列表中

void CDlgOpenSave::ShowFileToList(CString strFilePath, CString strFileName, int &length)

{

if ( strFileName.Compare(_T(".")) ==0 || strFileName.Compare(_T("..") ) ==0 )

return;

CString strPathName = strFilePath + strFileName;

SHFILEINFOW fileInfo;

DWORD_PTR dwPtr = ::SHGetFileInfoW(strPathName,FILE_ATTRIBUTE_HIDDEN, &fileInfo, sizeof(SHFILEINFO), SHGFI_DISPLAYNAME | SHGFI_ICON | SHGFI_TYPENAME);

if (IsShowFile(strPathName))

{

ListItem itList;//这个是自定义的结构体，来存储文件信息

itList.strFileName = strFileName;

itList.strFilePath = strFilePath;

itList.dwFileType = F_NORMAL;

OnNotifyShowListContent(strFileName, fileInfo,length, itList);//添加到界面列表中

length++;

}

else if(::PathIsDirectory(strPathName + _T("\")))

{

ListItem itList;

itList.strFileName = strFileName; //文件名

itList.strFilePath = strFilePath;

itList.dwFileType = F_NORMAL;

OnNotifyShowListContent(strFileName, fileInfo, length, itList);

length++;

}

}

例如：

// The following code to get a folder path which you //select.

BOOL ShellGetOutPath(HANDLE hDlg, LPTSTR lpszRoot, LPTSTR lpszPath, LPCTSTR lpszDesc/* = 0*/)

{

BOOL bRet;

//TCHAR szPath[MAX_PATH];

LPITEMIDLIST lpil;

//HGLOBAL hgMem;



// the following segment define and initialize the BROWSEINFO, prepareing for the SHBrowseForFolder API

BROWSEINFO bi;

bi.hwndOwner=(HWND) hDlg;

IShellFolder *ppshf;

SHGetDesktopFolder(&ppshf);

if(!ppshf)

return FALSE;

LPITEMIDLIST pidlRoot = NULL;

ppshf->ParseDisplayName((HWND)hDlg, NULL, lpszRoot, NULL, &pidlRoot, NULL);

if(!pidlRoot)

return FALSE;

bi.pidlRoot = pidlRoot;

bi.pszDisplayName = lpszPath;//szPath;

//strMsg.LoadString(IDS_STR_FOLDER_OUTPUT);

bi.lpszTitle = lpszDesc;

bi.ulFlags = /*BIF_DONTGOBELOWDOMAIN |*/BIF_RETURNONLYFSDIRS | BIF_NEWDIALOGSTYLE ;

bi.lpfn = BFFCALLBACK(BrowseCallbackProcInit);

bi.lParam = (LPARAM)lpszPath;

lpil = SHBrowseForFolder(&bi);

if(lpil == NULL)

return FALSE;

bRet = SHGetPathFromIDList(lpil, lpszPath);

CoTaskMemFree(lpil);

//CString strPath = lpszPath;

TCHAR szDrive[_MAX_DRIVE];

_tsplitpath(lpszPath, szDrive, NULL, NULL, NULL);

return bRet;

}



[cpp] view plaincopy

// the callback function for the BROWSEINFO, to implement your own function

// here I try to do that:

// 1, when the user slelect CD/DVD drives, the OK and Make New Folder button

// will be disable.

// 2, Change the title of the dialogbox.

int CALLBACK BrowseCallbackProcInit(HWND hwnd, UINT uMsg, LPARAM lParam, LPARAM lpData)

{

TCHAR szPath[MAX_PATH];

// TCHAR szTargetPath[MAX_PATH];

TCHAR szDrive[MAX_PATH], szDir[MAX_PATH], szFile[MAX_PATH], szExt[MAX_PATH];

LPCITEMIDLIST pidl;

// WIN32_FIND_DATA FileData;

// HANDLE hSearch;

static HWND hMakeNewFolder=NULL;



TCHAR szWindosText[MAX_PATH+1];

switch(uMsg)

{

case BFFM_SELCHANGED:

{

pidl = LPCITEMIDLIST(lParam);

SHGetPathFromIDList(pidl, szPath);

if (szPath[0] == '/0')

SendMessage(hwnd, BFFM_ENABLEOK, lParam, 0);

_tsplitpath(szPath, szDrive, szDir, szFile, szExt);

TCHAR szRoot[MAX_PATH+1];

lstrcpyn(szRoot,szPath, MAX_PATH);

::PathStripToRoot(szRoot);

// disable when select CD/DVD drive, otherwise enables

if(GetDriveType(szRoot)==DRIVE_CDROM)

{

HWND btnHwnd=GetDlgItem(hwnd,IDOK);

::EnableWindow( btnHwnd, FALSE);

if(hMakeNewFolder)

::EnableWindow(hMakeNewFolder,FALSE);

//SendMessage(hwnd,BFFM_SETSELECTION ,TRUE ,(LPARAM)(_T("C://")));

}

else

{

HWND btnHwnd=GetDlgItem(hwnd,IDOK);

::EnableWindow( btnHwnd, TRUE);

if(hMakeNewFolder)

::EnableWindow(hMakeNewFolder,TRUE);

}



}

break;

case BFFM_INITIALIZED:

{

SendMessage(hwnd, BFFM_SETSELECTION, TRUE, (LPARAM)(LPCTSTR)lpData);

//if (szLastPath[0] == '/0')

// SendMessage(hwnd, BFFM_ENABLEOK, lParam, 0);

//Change the caption of the Browse for Folder caption

CString szCaption((LPCTSTR)lpData);

if(szCaption.GetLength()>2)

{

szCaption.LoadString(IDS_S***E_AGENT_INSTALLER);

SetWindowText(hwnd,szCaption);

}

HWND hChild=GetWindow(hwnd, GW_CHILD);

//Get the tree view handle

//while(hChild)

//{

// TCHAR szClass[256];

// GetClassName(hChild, szClass, 255);

// //

// if (strcmp(szClass, _T("SHBrowseForFolder ShellNameSpace Control")) == 0)

// {

// hTree=hChild;

// break;

// }

// hChild = GetNextWindow(hChild, GW_HWNDNEXT);

//}

while(hChild)

{

GetWindowText(hChild,szWindosText,MAX_PATH);

TCHAR szText[]=_T("&Make New Folder");

if(lstrcmp(szWindosText,szText)==0)

{

//find and keep the make new folder button handle

hMakeNewFolder=hChild;

//::OutputDebugString(_T("find the control"));

//::OutputDebugString(szWindosText);

break;

}

hChild = GetNextWindow(hChild, GW_HWNDNEXT);

}



}

break;

}

return 0;

}