private static IntPtr GetPidl([NotNull] DirectoryInfo directoryInfo)
{
if (directoryInfo.Parent != null)
{
var oParentFolder = GetParentFolder(directoryInfo.Parent.FullName);
if (null == oParentFolder)
{
return(IntPtr.Zero);
}
uint pchEaten = 0;
Enums.Sfgao pdwAttributes = 0;
IntPtr pPidl;
oParentFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, directoryInfo.Name, ref pchEaten, out pPidl, ref pdwAttributes);
return(pPidl);
}
return(IntPtr.Zero);
}
private static IShellFolder GetParentFolder(string folderName)
{
if (null == _oParentFolder)
{
var oDesktopFolder = (IShellFolder)SHGetDesktopFolder.GetDesktopFolder();
if (null == oDesktopFolder)
{
return(null);
}
IntPtr pPidl;
uint pchEaten = 0;
Enums.Sfgao pdwAttributes = 0;
var nResult = oDesktopFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, folderName, ref pchEaten, out pPidl, ref pdwAttributes);
if (SOk != nResult)
{
return(null);
}
var pStrRet = Marshal.AllocCoTaskMem(MaxPath * 2 + 4);
Marshal.WriteInt32(pStrRet, 0, 0);
nResult = _oDesktopFolder.GetDisplayNameOf(pPidl, Enums.Shgno.FORPARSING, pStrRet);
var strFolder = new StringBuilder(MaxPath);
DllImports.StrRetToBuf(pStrRet, pPidl, strFolder, MaxPath);
Marshal.FreeCoTaskMem(pStrRet);
pStrRet = IntPtr.Zero;
_strParentFolder = strFolder.ToString();
IntPtr pUnknownParentFolder;
nResult = oDesktopFolder.BindToObject(pPidl, IntPtr.Zero, ref _iidIShellFolder, out pUnknownParentFolder);
Marshal.FreeCoTaskMem(pPidl);
if (SOk != nResult)
{
return(null);
}
_oParentFolder = (IShellFolder)Marshal.GetTypedObjectForIUnknown(pUnknownParentFolder, typeof(IShellFolder));
}
return(_oParentFolder);
}