public bool GetChildrenAsync(bool showHiddenObjects, bool showNonFolders, bool sortResults, FoundChildDelegate callback)
{
if (this.pidl == null || !this.pidl.IsFolder || folder == null)
{
return(true);
}
int hresult = folder.EnumObjects(IntPtr.Zero, NativeMethods.SHCONTF.SHCONTF_FOLDERS | (showNonFolders ? NativeMethods.SHCONTF.SHCONTF_NONFOLDERS : 0) | (showHiddenObjects ? NativeMethods.SHCONTF.SHCONTF_INCLUDEHIDDEN : 0), out enumList);
if (hresult != 0)
{
return(true);
}
IntPtr pidl = IntPtr.Zero;
int fetched = 0;
while (enumList.Next(1, ref pidl, out fetched) == 0 && fetched == 1)
{
if (callback(new PIDL(this.pidl.Pidl, pidl)))
{
if (enumList != null)
{
Marshal.ReleaseComObject(enumList);
}
enumList = null;
return(true);
}
}
if (enumList != null)
{
Marshal.ReleaseComObject(enumList);
}
enumList = null;
return(false);
}
public int CountChildren(bool showHiddenObjects, bool showNonFolders)
{
int result = 0;
NativeMethods.IEnumIDList enumList = null;
if (this.pidl == null || !this.pidl.IsFolder || folder == null)
{
return(0);
}
int hr = folder.EnumObjects(IntPtr.Zero, NativeMethods.SHCONTF.SHCONTF_FOLDERS | (showNonFolders ? NativeMethods.SHCONTF.SHCONTF_NONFOLDERS : 0) | (showHiddenObjects ? NativeMethods.SHCONTF.SHCONTF_INCLUDEHIDDEN : 0), out enumList);
if (hr != 0)
{
return(0);
}
IntPtr pidl = IntPtr.Zero;
int fetched = 0;
while (enumList.Next(1, ref pidl, out fetched) == 0 && fetched == 1)
{
result++;
}
if (enumList != null)
{
Marshal.ReleaseComObject(enumList);
}
enumList = null;
return(result);
}
public List <PIDL> GetChildren1(bool showHiddenObjects, bool showNonFolders, bool sortResults)
{
Cancel = false;
List <PIDL> children = new List <PIDL>();
if (this.pidl == null || !this.pidl.IsFolder || folder == null)
{
return(children);
}
int hresult = folder.EnumObjects(IntPtr.Zero, NativeMethods.SHCONTF.SHCONTF_FOLDERS | (showNonFolders ? NativeMethods.SHCONTF.SHCONTF_NONFOLDERS : 0) | (showHiddenObjects ? NativeMethods.SHCONTF.SHCONTF_INCLUDEHIDDEN : 0), out enumList);
if (hresult != 0)
{
return(null);
}
IntPtr pidl = IntPtr.Zero;
int fetched = 0;
while (enumList.Next(1, ref pidl, out fetched) == 0 && fetched == 1)
{
if (Cancel)
{
break;
}
children.Add(new PIDL(this.pidl.Pidl, pidl));
}
if (enumList != null)
{
Marshal.ReleaseComObject(enumList);
}
enumList = null;
return(children);
}
public void CancelFind()
{
if (enumList != null)
{
Marshal.ReleaseComObject(enumList);
}
enumList = null;
}
public PIDL NextChild()
{
int fetched = 0;
IntPtr pidl = IntPtr.Zero;
if (enumList.Next(1, ref pidl, out fetched) == 0 && fetched == 1)
{
return(new PIDL(this.pidl.Pidl, pidl));
}
HasChildren = false;
if (enumList != null)
{
Marshal.ReleaseComObject(enumList);
}
enumList = null;
return(null);
}
public bool Children(bool showHiddenObjects, bool showNonFolders)
{
using (ShellFolder sf = new ShellFolder(this))
{
bool children = false;
NativeMethods.IEnumIDList enumList = null;
try
{
if (!this.IsFolder || sf.Folder == null)
{
return(children);
}
int hr = sf.Folder.EnumObjects(
IntPtr.Zero,
NativeMethods.SHCONTF.SHCONTF_FOLDERS |
(showNonFolders ? NativeMethods.SHCONTF.SHCONTF_NONFOLDERS : 0) |
(showHiddenObjects ? NativeMethods.SHCONTF.SHCONTF_INCLUDEHIDDEN : 0),
out enumList
);
if (hr != 0)
{
return(children);
}
IntPtr pidl = IntPtr.Zero;
int fetched = 0;
while (enumList.Next(1, ref pidl, out fetched) == 0 && fetched == 1)
{
Marshal.FreeCoTaskMem(pidl);
pidl = IntPtr.Zero;
fetched = 0;
children = true;
break;
}
}
finally
{
if (enumList != null)
{
Marshal.ReleaseComObject(enumList);
}
enumList = null;
}
return(children);
}
}
private static void GetChildren(IntPtr pidl, bool getFolders, bool getFiles, ref Pidl[] _children)
{
NativeMethods.IShellFolder folder = null;
if (LowLevelPidlWorks.GetSize(pidl) <= 2)
{
if (NativeMethods.SHGetDesktopFolder(out folder) != 0)
{
return;
}
}
else
{
GetIShellFolderForPidl(pidl, out folder);
}
if (folder == null)
{
return;
}
try
{
NativeMethods.IEnumIDList enumIdList = null;
ArrayList items = new ArrayList();
if (getFolders)
{
uint itemsToInclude = NativeMethods.SHCONTF_FOLDERS /* | WinApiProvider.SHCONTF.SHCONTF_INCLUDEHIDDEN*/;
if (folder.EnumObjects(IntPtr.Zero, itemsToInclude, out enumIdList) == S_OK)
{
try
{
IntPtr newPidl = IntPtr.Zero;
IntPtr fetched = IntPtr.Zero;
enumIdList.Reset();
while (enumIdList.Next(1, out newPidl, out fetched) == 0)
{
IntPtr pidlConcat = IntPtr.Zero;
LowLevelPidlWorks.Concatenate(pidl, newPidl, out pidlConcat);
NativeMethods.CoTaskMemFree(newPidl);
Pidl item = new Pidl(pidlConcat, PidlType.Folder);
items.Add(item);
newPidl = IntPtr.Zero;
}
}
finally
{
Marshal.ReleaseComObject(enumIdList);
}
}
}
if (getFiles)
{
uint itemsToInclude = NativeMethods.SHCONTF_NONFOLDERS /*| WinApiProvider.SHCONTF.SHCONTF_INCLUDEHIDDEN | WinApiProvider.SHCONTF.SHCONTF_STORAGE*/;
if (folder.EnumObjects(IntPtr.Zero, itemsToInclude, out enumIdList) == S_OK)
{
try
{
IntPtr newPidl = IntPtr.Zero;
IntPtr fetched = IntPtr.Zero;
enumIdList.Reset();
while (enumIdList.Next(1, out newPidl, out fetched) == 0)
{
IntPtr pidlConcat = IntPtr.Zero;
LowLevelPidlWorks.Concatenate(pidl, newPidl, out pidlConcat);
NativeMethods.CoTaskMemFree(newPidl);
if (LowLevelPidlWorks.HasSuchAttributes(pidlConcat, NativeMethods.SFGAO_STREAM))
{
Pidl item = new Pidl(pidlConcat, PidlType.File);
items.Add(item);
}
else
{
NativeMethods.CoTaskMemFree(pidlConcat);
}
newPidl = IntPtr.Zero;
}
}
finally
{
Marshal.ReleaseComObject(enumIdList);
}
}
}
_children = new Pidl[items.Count];
for (int i = 0; i < _children.Length; i++)
{
_children[i] = (Pidl)items[i];
}
}
finally
{
Marshal.ReleaseComObject(folder);
}
}
