public IEnumerable <DirectoryInfoEx> EnumerateDirectories(String searchPattern, SearchOption searchOption, CancelDelegate cancel)
{
IntPtr ptrEnum = IntPtr.Zero;
IEnumIDList IEnum = null;
PIDL parentPIDL = this.PIDL;
using (ShellFolder2 sf = this.ShellFolder)
try
{
if (sf.EnumObjects(IntPtr.Zero, flag, out ptrEnum) == ShellAPI.S_OK)
{
IEnum = (IEnumIDList)Marshal.GetTypedObjectForIUnknown(ptrEnum, typeof(IEnumIDList));
IntPtr pidlSubItem;
int celtFetched;
while (!IOTools.IsCancelTriggered(cancel) && IEnum.Next(1, out pidlSubItem, out celtFetched) == ShellAPI.S_OK && celtFetched == 1)
{
ShellAPI.SFGAO attribs = ShellAPI.SFGAO.FOLDER | ShellAPI.SFGAO.FILESYSTEM | ShellAPI.SFGAO.STREAM |
ShellAPI.SFGAO.FILESYSANCESTOR | ShellAPI.SFGAO.NONENUMERATED;
sf.GetAttributesOf(1, new IntPtr[] { pidlSubItem }, ref attribs);
bool isZip = ((attribs & ShellAPI.SFGAO.FOLDER) != 0 && (attribs & ShellAPI.SFGAO.STREAM) != 0);
bool isDir = ((attribs & ShellAPI.SFGAO.FOLDER) != 0);
//0.18 Added a check for NonEnumerated items so DirectoryInfoEx.EnumerateDirectories wont return some system directories (e.g. C:\MSOCache)
//bool isNonEnumerated = ((attribs & ShellAPI.SFGAO.NONENUMERATED) != 0);
bool isFileAncestor = ((attribs & ShellAPI.SFGAO.FILESYSANCESTOR) != 0);
bool includedFolder = false;
if (!isZip && !isFileAncestor) //0.14 : Added allowed folder list so Non-FileAncestor directory (e.g. recycle-bin) is listed.
{
string[] allowedPaths = new string[]
{
"::{645FF040-5081-101B-9F08-00AA002F954E}"
};
string path = PIDLToPath(new PIDL(pidlSubItem, false));
foreach (string allowedPath in allowedPaths)
{
if (allowedPath == path)
{
includedFolder = true;
}
}
if (!includedFolder)
{
if (IOTools.HasParent(this, NetworkDirectory))
{
includedFolder = true;
}
}
}
if (isDir && !isZip /*&& !isNonEnumerated*/ && (isFileAncestor || includedFolder))
{
PIDL subPidl = new PIDL(pidlSubItem, false);
//DirectoryInfoEx di = new DirectoryInfoEx(this, subPidl);
//0.22: Fix illegal PIDL for Directory under Library.ms directory
bool isLibraryItem = IOTools.IsLibraryItem(FullName);
DirectoryInfoEx di = new DirectoryInfoEx(sf, parentPIDL, subPidl, isLibraryItem);
if (IOTools.MatchFileMask(di.Name, searchPattern))
{
yield return(di);
}
if (searchOption == SearchOption.AllDirectories)
{
IEnumerator <DirectoryInfoEx> dirEnumerator = di.EnumerateDirectories(searchPattern, searchOption, cancel).GetEnumerator();
while (dirEnumerator.MoveNext())
{
//Debug.Assert(dirEnumerator.Current.IsFolder);
yield return(dirEnumerator.Current);
}
}
}
}
}
}
finally
{
if (parentPIDL != null)
{
parentPIDL.Free();
parentPIDL = null;
}
if (IEnum != null)
{
Marshal.ReleaseComObject(IEnum);
Marshal.Release(ptrEnum);
}
}
}
