public static Icon GetIcon(string path)
{
var directoryName = Path.GetDirectoryName(path);
var fileName = Path.GetFileName(path);
IntPtr folderPtr;
if (SHGetDesktopFolder(out folderPtr) != SOk)
{
return(null);
}
var desktopFolder = (IShellFolder)Marshal.GetTypedObjectForIUnknown(folderPtr, typeof(IShellFolder));
try
{
Sfgao pdwAttributes = 0;
uint pchEaten = 0;
IntPtr ppidl;
desktopFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, directoryName, ref pchEaten, out ppidl, ref pdwAttributes);
Guid iidShellFolder = new Guid("000214E6-0000-0000-C000-000000000046");
IntPtr ppv;
desktopFolder.BindToObject(ppidl, IntPtr.Zero, iidShellFolder, out ppv);
var folder = (IShellFolder)Marshal.GetTypedObjectForIUnknown(ppv, typeof(IShellFolder));
try
{
folder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, fileName, ref pchEaten, out ppidl, ref pdwAttributes);
try
{
return(ExtractIcon(folder, ppidl));
}
finally
{
Marshal.Release(ppidl);
}
}
finally
{
Marshal.Release(ppv);
Marshal.ReleaseComObject(folder);
}
}
finally
{
Marshal.Release(folderPtr);
Marshal.ReleaseComObject(desktopFolder);
}
}
/// <summary>
/// Gets the parent folder
/// </summary>
/// <param name="folderName">Folder path</param>
/// <returns>IShellFolder for the folder (relative from the desktop)</returns>
private IShellFolder GetParentFolder(string folderName)
{
if (null != _oParentFolder)
{
return(_oParentFolder);
}
var oDesktopFolder = GetDesktopFolder();
if (null == oDesktopFolder)
{
return(null);
}
// Get the PIDL for the folder file is in
IntPtr pPidl;
uint pchEaten = 0;
Sfgao pdwAttributes = 0;
var nResult = oDesktopFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, folderName, ref pchEaten,
out pPidl,
ref pdwAttributes);
if (S_OK != nResult)
{
return(null);
}
var pStrRet = Marshal.AllocCoTaskMem(MAX_PATH * 2 + 4);
Marshal.WriteInt32(pStrRet, 0, 0);
_oDesktopFolder.GetDisplayNameOf(pPidl, Shgno.ForParsing, pStrRet);
var strFolder = new StringBuilder(MAX_PATH);
StrRetToBuf(pStrRet, pPidl, strFolder, MAX_PATH);
Marshal.FreeCoTaskMem(pStrRet);
_strParentFolder = strFolder.ToString();
// Get the IShellFolder for folder
IntPtr pUnknownParentFolder;
nResult = oDesktopFolder.BindToObject(pPidl, IntPtr.Zero, ref _iidIShellFolder, out pUnknownParentFolder);
// Free the PIDL first
Marshal.FreeCoTaskMem(pPidl);
if (S_OK != nResult)
{
return(null);
}
_oParentFolder =
(IShellFolder)Marshal.GetTypedObjectForIUnknown(pUnknownParentFolder, typeof(IShellFolder));
return(_oParentFolder);
}
/// <summary>
/// Get the PIDLs
/// </summary>
/// <param name="arrFi">Array of FileInfo</param>
/// <returns>Array of PIDLs</returns>
protected IntPtr[] GetPidLs(FileInfo[] arrFi)
{
if (null == arrFi || 0 == arrFi.Length)
{
return(null);
}
var oParentFolder = GetParentFolder(arrFi[0].DirectoryName);
if (null == oParentFolder)
{
return(null);
}
var arrPidLs = new IntPtr[arrFi.Length];
var n = 0;
foreach (var fi in arrFi)
{
// Get the file relative to folder
uint pchEaten = 0;
Sfgao pdwAttributes = 0;
IntPtr pPidl;
var nResult = oParentFolder.ParseDisplayName(IntPtr.Zero, IntPtr.Zero, fi.Name, ref pchEaten, out pPidl,
ref pdwAttributes);
if (S_OK != nResult)
{
FreePidLs(arrPidLs);
return(null);
}
arrPidLs[n] = pPidl;
n++;
}
return(arrPidLs);
}