public ShellItem()
{
_rootItem = this;
try
{
// create a PIDL for the Desktop shell item.
_pidl = new Pidl(Environment.SpecialFolder.Desktop);
var shInfo = new Native.SHFILEINFO();
Native.Shell32.SHGetFileInfo((IntPtr) _pidl, 0, out shInfo, (uint) Marshal.SizeOf(shInfo), SHGFI.SHGFI_PIDL | SHGFI.SHGFI_DISPLAYNAME | SHGFI.SHGFI_SYSICONINDEX);
// get the root IShellFolder interface
int hResult = Native.Shell32.SHGetDesktopFolder(ref _shellFolder);
if (hResult != 0)
Marshal.ThrowExceptionForHR(hResult);
_displayName = shInfo.szDisplayName;
_typeName = string.Empty;
_iconIndex = shInfo.iIcon;
_isFolder = true;
_isVirtual = true;
_hasSubFolders = true;
}
catch (Exception ex)
{
// if an exception happens during construction, we must release the PIDL now (remember, it's a pointer!)
if (_pidl != null)
_pidl.Dispose();
throw new Exception("Creation of the root namespace shell item failed.", ex);
}
#if DEBUG
_instanceCount++;
#endif
}
private SystemImageList(bool useSmallIcons)
{
//JY: We use static instances here without IDisposable here because the system image list is allocated
// to us by shell32, and we only get one per process for a given icon size. Even doing an ImageList_Destroy
// in a destructor can cause funny business.
const int FILE_ATTRIBUTE_NORMAL = 0x80;
// retrieve the info for a fake file so we can get the image list handle.
Native.SHFILEINFO shInfo = new Native.SHFILEINFO();
Native.SHGFI uFlags = Native.SHGFI.SHGFI_USEFILEATTRIBUTES | Native.SHGFI.SHGFI_SYSICONINDEX;
if (useSmallIcons)
uFlags |= Native.SHGFI.SHGFI_SMALLICON;
else
uFlags |= Native.SHGFI.SHGFI_LARGEICON;
_handle = Native.Shell32.SHGetFileInfo(".txt", FILE_ATTRIBUTE_NORMAL, out shInfo, (uint) Marshal.SizeOf(shInfo), uFlags);
}
private SystemImageList(bool useSmallIcons)
{
//JY: We use static instances here without IDisposable here because the system image list is allocated
// to us by shell32, and we only get one per process for a given icon size. Even doing an ImageList_Destroy
// in a destructor can cause funny business.
const int FILE_ATTRIBUTE_NORMAL = 0x80;
// retrieve the info for a fake file so we can get the image list handle.
Native.SHFILEINFO shInfo = new Native.SHFILEINFO();
Native.SHGFI uFlags = Native.SHGFI.SHGFI_USEFILEATTRIBUTES | Native.SHGFI.SHGFI_SYSICONINDEX;
if (useSmallIcons)
{
uFlags |= Native.SHGFI.SHGFI_SMALLICON;
}
else
{
uFlags |= Native.SHGFI.SHGFI_LARGEICON;
}
_handle = Native.Shell32.SHGetFileInfo(".txt", FILE_ATTRIBUTE_NORMAL, out shInfo, (uint)Marshal.SizeOf(shInfo), uFlags);
}
public ShellItem()
{
_rootItem = this;
try
{
// create a PIDL for the Desktop shell item.
_pidl = new Pidl(Environment.SpecialFolder.Desktop);
var shInfo = new Native.SHFILEINFO();
Native.Shell32.SHGetFileInfo((IntPtr)_pidl, 0, out shInfo, (uint)Marshal.SizeOf(shInfo), SHGFI.SHGFI_PIDL | SHGFI.SHGFI_DISPLAYNAME | SHGFI.SHGFI_SYSICONINDEX);
// get the root IShellFolder interface
int hResult = Native.Shell32.SHGetDesktopFolder(ref _shellFolder);
if (hResult != 0)
{
Marshal.ThrowExceptionForHR(hResult);
}
_displayName = shInfo.szDisplayName;
_typeName = string.Empty;
_iconIndex = shInfo.iIcon;
_isFolder = true;
_isVirtual = true;
_hasSubFolders = true;
}
catch (Exception ex)
{
// if an exception happens during construction, we must release the PIDL now (remember, it's a pointer!)
if (_pidl != null)
{
_pidl.Dispose();
}
throw new Exception("Creation of the root namespace shell item failed.", ex);
}
#if DEBUG
_instanceCount++;
#endif
}
public FolderListViewItem(Pidl absolutePidl, Pidl myDocumentsReferencePidl, FileSizeFormat fileSizeFormat)
{
_pidl = absolutePidl;
_fullPath = absolutePidl.Path;
// request shell item info now - it's faster than binding to ShellItem directly, and we need it for sorting purposes anyway
var uFlags = SHGFI.SHGFI_PIDL | SHGFI.SHGFI_TYPENAME | SHGFI.SHGFI_DISPLAYNAME | SHGFI.SHGFI_SYSICONINDEX;
// bug #9975: asking for SHGFI_ATTRIBUTES can be a very slow operation, so we don't want to ask for them unless we really need them.
// if we're dealing with a regular file or directory, then getting the attributes gives us no additional information, so we can avoid it
var isFile = !string.IsNullOrEmpty(_fullPath) && File.Exists(_fullPath);
var isDirectory = !string.IsNullOrEmpty(_fullPath) && Directory.Exists(_fullPath);
if (!isFile && !isDirectory)
{
uFlags = uFlags | SHGFI.SHGFI_ATTRIBUTES;
}
var shInfo = new SHFILEINFO();
Shell32.SHGetFileInfo((IntPtr) _pidl, 0, out shInfo, (uint)Marshal.SizeOf(shInfo), uFlags);
// check if item is purely virtual or is a physical file system object
var isPureVirtual = !isFile && !isDirectory && ((SFGAO)shInfo.dwAttributes & SFGAO.SFGAO_FILESYSTEM) == 0;
// check if item is actually a folder or potentially has subfolders; exclude real files that provide subfolders via shell namespace extensions (e.g. ZIP files in WinXP)
var isFolder = isDirectory || (((SFGAO) shInfo.dwAttributes & (SFGAO.SFGAO_FOLDER | SFGAO.SFGAO_HASSUBFOLDER)) != 0 && !isFile);
byte itemClass;
if (_pidl == myDocumentsReferencePidl)
itemClass = 0;
else if (isPureVirtual && isFolder)
itemClass = 64;
else if (isFolder)
itemClass = (byte) (128 + GetRootVolumeIndex(_fullPath));
else
itemClass = byte.MaxValue;
this._iconIndex = shInfo.iIcon;
this._lastModifiedValid = false;
this.DisplayName = shInfo.szDisplayName;
this.TypeName = shInfo.szTypeName;
this.ItemClass = itemClass;
this.LastModified = DateTime.MinValue;
this.IsFolder = isFolder;
this.FileSize = -1;
if (File.Exists(_fullPath))
{
FileInfo fileInfo = new FileInfo(this._fullPath);
this._lastModifiedValid = true;
this.LastModified = fileInfo.LastWriteTime;
this.FileSize = fileInfo.Length;
}
else if (Directory.Exists(_fullPath))
{
this._lastModifiedValid = true;
this.LastModified = Directory.GetLastWriteTime(_fullPath);
}
this.Text = this.DisplayName;
this.ImageIndex = this._iconIndex;
this.SubItems.Add(CreateSubItem(this, FormatFileSize(this.FileSize, fileSizeFormat)));
this.SubItems.Add(CreateSubItem(this, this.TypeName));
this.SubItems.Add(CreateSubItem(this, FormatLastModified(this.LastModified, this._lastModifiedValid)));
}
public ShellItem(Pidl pidl, ShellItem parentShellItem, bool relativePidl)
{
int hResult;
_rootItem = parentShellItem._rootItem;
try
{
IntPtr tempPidl;
if (relativePidl)
{
_pidl = new Pidl(parentShellItem.Pidl, pidl);
tempPidl = (IntPtr) pidl; // use the relative one from parameters
}
else
{
_pidl = pidl.Clone();
tempPidl = (IntPtr) _pidl; // use the absolute one that we constructed just now
}
const Native.SHGFI flags = Native.SHGFI.SHGFI_PIDL // indicates that we're specifying the item by PIDL
| Native.SHGFI.SHGFI_DISPLAYNAME // indicates that we want the item's display name
| Native.SHGFI.SHGFI_SYSICONINDEX // indicates that we want the item's icon's index in the system image list
| Native.SHGFI.SHGFI_ATTRIBUTES // indicates that we want the item's attributes
| Native.SHGFI.SHGFI_TYPENAME; // indicates that we want the item's type name
Native.SHFILEINFO shInfo = new Native.SHFILEINFO();
Native.Shell32.SHGetFileInfo((IntPtr) _pidl, 0, out shInfo, (uint) Marshal.SizeOf(shInfo), flags);
// read item attributes
Native.SFGAO attributeFlags = (Native.SFGAO) shInfo.dwAttributes;
// create the item's IShellFolder interface
if ((attributeFlags & Native.SFGAO.SFGAO_FOLDER) != 0)
{
Guid iidIShellFolder = new Guid(IID.IID_IShellFolder);
if (_pidl == _rootItem._pidl)
{
// if the requested PIDL is the root namespace (the desktop) we can't use the the BindToObject method, so get it directly
hResult = Native.Shell32.SHGetDesktopFolder(ref _shellFolder);
}
else
{
if (relativePidl)
hResult = (int) parentShellItem._shellFolder.BindToObject(tempPidl, IntPtr.Zero, ref iidIShellFolder, out _shellFolder);
else
hResult = (int) _rootItem._shellFolder.BindToObject(tempPidl, IntPtr.Zero, ref iidIShellFolder, out _shellFolder);
}
if (hResult != 0)
{
// some objects are marked as folders, but really aren't and thus cannot be bound to an IShellFolder
// log these events for future study, but it's not exactly something to be concerned about in isolated cases.
// Marshal.ThrowExceptionForHR(hResult);
if ((attributeFlags & Native.SFGAO.SFGAO_HASSUBFOLDER) == 0)
attributeFlags = attributeFlags & ~Native.SFGAO.SFGAO_FOLDER;
}
}
_displayName = shInfo.szDisplayName;
_typeName = shInfo.szTypeName;
_iconIndex = shInfo.iIcon;
_isFolder = (attributeFlags & Native.SFGAO.SFGAO_FOLDER) != 0;
_isVirtual = (attributeFlags & Native.SFGAO.SFGAO_FILESYSTEM) == 0;
_hasSubFolders = (attributeFlags & Native.SFGAO.SFGAO_HASSUBFOLDER) != 0;
}
catch (Exception ex)
{
// if an exception happens during construction, we must release the PIDL now (remember, it's a pointer!)
if (_pidl != null)
_pidl.Dispose();
throw new Exception("Creation of the specified shell item failed.", ex);
}
#if DEBUG
_instanceCount++;
#endif
}
public ShellItem(Pidl pidl, ShellItem parentShellItem, bool relativePidl)
{
int hResult;
_rootItem = parentShellItem._rootItem;
try
{
IntPtr tempPidl;
if (relativePidl)
{
_pidl = new Pidl(parentShellItem.Pidl, pidl);
tempPidl = (IntPtr)pidl; // use the relative one from parameters
}
else
{
_pidl = pidl.Clone();
tempPidl = (IntPtr)_pidl; // use the absolute one that we constructed just now
}
const Native.SHGFI flags = Native.SHGFI.SHGFI_PIDL // indicates that we're specifying the item by PIDL
| Native.SHGFI.SHGFI_DISPLAYNAME // indicates that we want the item's display name
| Native.SHGFI.SHGFI_SYSICONINDEX // indicates that we want the item's icon's index in the system image list
| Native.SHGFI.SHGFI_ATTRIBUTES // indicates that we want the item's attributes
| Native.SHGFI.SHGFI_TYPENAME; // indicates that we want the item's type name
Native.SHFILEINFO shInfo = new Native.SHFILEINFO();
Native.Shell32.SHGetFileInfo((IntPtr)_pidl, 0, out shInfo, (uint)Marshal.SizeOf(shInfo), flags);
// read item attributes
Native.SFGAO attributeFlags = (Native.SFGAO)shInfo.dwAttributes;
// create the item's IShellFolder interface
if ((attributeFlags & Native.SFGAO.SFGAO_FOLDER) != 0)
{
Guid iidIShellFolder = new Guid(IID.IID_IShellFolder);
if (_pidl == _rootItem._pidl)
{
// if the requested PIDL is the root namespace (the desktop) we can't use the the BindToObject method, so get it directly
hResult = Native.Shell32.SHGetDesktopFolder(ref _shellFolder);
}
else
{
if (relativePidl)
{
hResult = (int)parentShellItem._shellFolder.BindToObject(tempPidl, IntPtr.Zero, ref iidIShellFolder, out _shellFolder);
}
else
{
hResult = (int)_rootItem._shellFolder.BindToObject(tempPidl, IntPtr.Zero, ref iidIShellFolder, out _shellFolder);
}
}
if (hResult != 0)
{
// some objects are marked as folders, but really aren't and thus cannot be bound to an IShellFolder
// log these events for future study, but it's not exactly something to be concerned about in isolated cases.
// Marshal.ThrowExceptionForHR(hResult);
if ((attributeFlags & Native.SFGAO.SFGAO_HASSUBFOLDER) == 0)
{
attributeFlags = attributeFlags & ~Native.SFGAO.SFGAO_FOLDER;
}
}
}
_displayName = shInfo.szDisplayName;
_typeName = shInfo.szTypeName;
_iconIndex = shInfo.iIcon;
_isFolder = (attributeFlags & Native.SFGAO.SFGAO_FOLDER) != 0;
_isVirtual = (attributeFlags & Native.SFGAO.SFGAO_FILESYSTEM) == 0;
_hasSubFolders = (attributeFlags & Native.SFGAO.SFGAO_HASSUBFOLDER) != 0;
}
catch (UnauthorizedAccessException ex)
{
// if an exception happens during construction, we must release the PIDL now (remember, it's a pointer!)
var path = string.Empty;
if (_pidl != null)
{
path = _pidl.Path;
_pidl.Dispose();
}
throw new PathAccessException(path, ex);
}
catch (Exception ex)
{
// if an exception happens during construction, we must release the PIDL now (remember, it's a pointer!)
if (_pidl != null)
{
_pidl.Dispose();
}
throw new Exception("Creation of the specified shell item failed.", ex);
}
#if DEBUG
_instanceCount++;
#endif
}
public static extern IntPtr SHGetFileInfo(IntPtr pIDL, uint dwFileAttributes, out SHFILEINFO psfi, uint cbFileInfo, SHGFI uFlags);
public static extern IntPtr SHGetFileInfo([MarshalAs(UnmanagedType.LPTStr)] string pszPath, uint dwFileAttribs, out SHFILEINFO psfi, uint cbFileInfo, SHGFI uFlags);
