private ShellFolder2 getIShellFolder()
{
if (this.FullName.Equals(IOTools.IID_Desktop))
{
return(getDesktopShellFolder());
}
else
{
ShellFolder2 retVal = getIShellFolderFromParent();
if (retVal != null)
{
return(retVal);
}
return(this.RequestPIDL((pidl, relPIDL) =>
{
using (ShellFolder2 parentShellFolder = getParentIShellFolder(pidl, out relPIDL))
{
IntPtr ptrShellFolder;
int hr = parentShellFolder.BindToObject(relPIDL.Ptr, IntPtr.Zero, ref ShellAPI.IID_IShellFolder2,
out ptrShellFolder);
if (ptrShellFolder == IntPtr.Zero || hr != ShellAPI.S_OK)
{
Marshal.ThrowExceptionForHR(hr);
}
return new ShellFolder2(ptrShellFolder);
}
}));
}
}
//internal static string getParentParseName(PIDL pidl)
//{
// PIDL relPIDL;
// PIDL parentPIDL = getParentPIDL(pidl, out relPIDL);
// IShellFolder sf = getParentIShellFolder(parentPIDL, out relPIDL);
// if (relPIDL.Size == 0)
// return IOTools.IID_Desktop;
// return loadName(sf, relPIDL, ShellAPI.SHGNO.FORPARSING);
//}
internal static ShellFolder2 getParentIShellFolder(PIDL pidl, out PIDL relPIDL)
{
int hr;
IntPtr ptrShellFolder = IntPtr.Zero;
if (pidl.Size == 0 || PIDL.ILFindLastID(pidl.Ptr) == pidl.Ptr || //is root or parent is root
PIDLToPath(pidl) == Environment.GetFolderPath(Environment.SpecialFolder.Desktop))
{
hr = ShellAPI.SHGetDesktopFolder(out ptrShellFolder);
relPIDL = new PIDL(pidl, true);
}
else
{
PIDL parentPIDL = getParentPIDL(pidl, out relPIDL);
//Console.WriteLine("ParentPIDL.Size = {0}", parentPIDL.Size);
Guid guid = ShellAPI.IID_IShellFolder2;
using (ShellFolder2 _desktopShellFolder = getDesktopShellFolder())
hr = _desktopShellFolder.BindToObject(parentPIDL.Ptr, IntPtr.Zero,
ref guid, out ptrShellFolder);
if (parentPIDL != null)
{
parentPIDL.Free();
}
}
if (hr == ShellAPI.S_OK && ptrShellFolder != IntPtr.Zero)
{
return(new ShellFolder2(ptrShellFolder));
}
Marshal.ThrowExceptionForHR(hr);
return(null); //mute error.
}
private ShellFolder2 getIShellFolder()
{
if (this.FullName.Equals(IOTools.IID_Desktop))
{
return(getDesktopShellFolder());
}
else
{
ShellFolder2 retVal = getIShellFolderFromParent();
if (retVal != null)
{
return(retVal);
}
PIDL pidlLookup = PIDL;
PIDL relPIDL = this.PIDLRel;
try
{
using (ShellFolder2 parentShellFolder = getParentIShellFolder(pidlLookup, out relPIDL))
{
IntPtr ptrShellFolder;
int hr = parentShellFolder.BindToObject(relPIDL.Ptr, IntPtr.Zero, ref ShellAPI.IID_IShellFolder2,
out ptrShellFolder);
if (ptrShellFolder == IntPtr.Zero || hr != ShellAPI.S_OK)
{
Marshal.ThrowExceptionForHR(hr);
}
return(new ShellFolder2(ptrShellFolder));
}
}
finally
{
if (pidlLookup != null)
{
pidlLookup.Free();
}
if (relPIDL != null)
{
relPIDL.Free();
}
relPIDL = null;
pidlLookup = null;
}
}
}
private ShellFolder2 getIShellFolderFromParent()
{
if (_parent != null)
{
using (ShellFolder2 parentShellFolder = _parent.ShellFolder)
{
IntPtr ptrShellFolder;
PIDL relPIDL = this.PIDLRel;
int hr = parentShellFolder.BindToObject(relPIDL.Ptr, IntPtr.Zero, ref ShellAPI.IID_IShellFolder2,
out ptrShellFolder);
if (ptrShellFolder != IntPtr.Zero && hr == ShellAPI.S_OK)
{
return(new ShellFolder2(ptrShellFolder));
}
}
}
return(null);
}