private IEnumerable <Pidl> EnumerateChildPidls(Native.SHCONTF flags)
{
if (!_isFolder)
{
throw new InvalidOperationException("Children can only be enumerated on a folder-type item.");
}
if (_shellFolder == null)
{
return(new Pidl[0]);
}
// Get the IEnumIDList interface pointer.
Native.IEnumIDList pEnum = null;
uint hRes = _shellFolder.EnumObjects(IntPtr.Zero, flags, out pEnum);
if (hRes != 0)
{
throw new Exception("IShellFolder::EnumObjects failed to enumerate child objects.", Marshal.GetExceptionForHR((int)hRes));
}
try
{
return(Pidl.ConvertPidlEnumeration(pEnum));
}
finally
{
// Free the interface pointer.
Marshal.ReleaseComObject(pEnum);
}
}
public IEnumerable <Pidl> EnumerateChildPidls(ChildType types, bool includeHiddenItems)
{
Native.SHCONTF flags = 0;
flags |= ((types & ChildType.Files) == ChildType.Files) ? Native.SHCONTF.SHCONTF_NONFOLDERS : 0;
flags |= ((types & ChildType.Folders) == ChildType.Folders) ? Native.SHCONTF.SHCONTF_FOLDERS : 0;
flags |= (includeHiddenItems) ? Native.SHCONTF.SHCONTF_INCLUDEHIDDEN : 0;
return(this.EnumerateChildPidls(flags));
}
public IEnumerable <ShellItem> EnumerateChildren(ChildType types, bool includeHiddenItems)
{
Native.SHCONTF flags = 0;
flags |= ((types & ChildType.Files) == ChildType.Files) ? Native.SHCONTF.SHCONTF_NONFOLDERS : 0;
flags |= ((types & ChildType.Folders) == ChildType.Folders) ? Native.SHCONTF.SHCONTF_FOLDERS : 0;
flags |= (includeHiddenItems) ? Native.SHCONTF.SHCONTF_INCLUDEHIDDEN : 0;
List <ShellItem> children = new List <ShellItem>();
foreach (Pidl pidl in EnumerateChildPidls(flags))
{
children.Add(new ShellItem(pidl, this));
pidl.Dispose();
}
return(children);
}