public static extern IntPtr SHGetFileInfo(string pszPath, FileAttributes dwFileAttributes, ref SHFILEINFO psfi, uint cbFileInfo, uint uFlags);
private static Image GetSpecialFolderIcon(string clsid, ref Size size)
{
Image image;
IShellFolder desktopFolder = ShellItem.GetDesktopFolder();
try
{
uint num;
IntPtr ptr;
SFGAO pdwAttributes = 0;
desktopFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, clsid, out num, out ptr, ref pdwAttributes);
SHFILEINFO psfi = new SHFILEINFO();
Shell32.SHGetFileInfo(ptr, FileAttributes.Directory, ref psfi, (SHGFI.SHGFI_LARGEICON | SHGFI.SHGFI_PIDL | SHGFI.SHGFI_USEFILEATTRIBUTES | SHGFI.SHGFI_ICON) | ((size.Height < 0x20) ? SHGFI.SHGFI_SMALLICON : SHGFI.SHGFI_LARGEICON));
image = IconToImage(psfi.hIcon);
}
catch (ArgumentException)
{
image = null;
}
finally
{
Marshal.ReleaseComObject(desktopFolder);
}
return image;
}
public static IntPtr SHGetFileInfo(string pszPath, FileAttributes dwFileAttributes, ref SHFILEINFO psfi, SHGFI Flags)
{
return SHGetFileInfo(pszPath, dwFileAttributes, ref psfi, (uint) Marshal.SizeOf(((SHFILEINFO) psfi).GetType()), (uint) Flags);
}
private Image GetIcon(string fileName, FileAttributes attributes, bool useAttributes, ref Size size)
{
Image image;
IDictionary<Size, Image> dictionary;
Dictionary<int, IDictionary<Size, Image>> dictionary2;
SHFILEINFO psfi = new SHFILEINFO();
Shell32.SHGetFileInfo(fileName, attributes, ref psfi, (useAttributes ? (SHGFI.SHGFI_LARGEICON | SHGFI.SHGFI_USEFILEATTRIBUTES) : SHGFI.SHGFI_LARGEICON) | (SHGFI.SHGFI_LARGEICON | SHGFI.SHGFI_SYSICONINDEX));
lock ((dictionary2 = this.IconCache))
{
if (this.IconCache.TryGetValue(psfi.iIcon, out dictionary))
{
if (dictionary == null)
{
return null;
}
if (dictionary.TryGetValue(size, out image))
{
return image;
}
}
}
psfi = new SHFILEINFO();
Shell32.SHGetFileInfo(fileName, attributes, ref psfi, ((useAttributes ? (SHGFI.SHGFI_LARGEICON | SHGFI.SHGFI_USEFILEATTRIBUTES) : SHGFI.SHGFI_LARGEICON) | (SHGFI.SHGFI_LARGEICON | SHGFI.SHGFI_ICON)) | ((size.Height < 0x20) ? SHGFI.SHGFI_SMALLICON : SHGFI.SHGFI_LARGEICON));
image = IconToImage(psfi.hIcon);
lock ((dictionary2 = this.IconCache))
{
if (dictionary != null)
{
dictionary.Add(size, image);
}
else
{
dictionary = IconCollection.Create();
dictionary.Add(size, image);
this.IconCache.Add(psfi.iIcon, dictionary);
}
}
return image;
}
