private static extern int SHGetFileInfo(
string pszPath,
int dwFileAttributes,
ref SHFILEINFO psfi,
uint cbFileInfo,
uint uFlags);
public static extern IntPtr SHGetFileInfo(IntPtr pszPath, int dwFileAttributes, out SHFILEINFO psfi, int cbFileInfo, SHGFI uFlags);
/// <summary>
/// Gets the information for the specified
/// file name and flags.
/// </summary>
public void GetInfo()
{
ShellIcon = null;
TypeName = "";
DisplayName = "";
SHFILEINFO shfi = new SHFILEINFO();
uint shfiSize = (uint)Marshal.SizeOf(shfi.GetType());
int ret = SHGetFileInfo(FileName, 0, ref shfi, shfiSize, (uint)(Flags));
if (ret != 0)
{
if (shfi.hIcon != IntPtr.Zero)
{
ShellIcon = System.Drawing.Icon.FromHandle(shfi.hIcon);
// Now owned by the GDI+ object
//DestroyIcon(shfi.hIcon);
}
TypeName = shfi.szTypeName;
DisplayName = shfi.szDisplayName;
}
else
{
int err = GetLastError();
Console.WriteLine($"Error {err}");
string txtS = new string('\0', 256);
int len = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, IntPtr.Zero, err, 0, txtS, 256, 0);
Console.WriteLine($"Len {len} text {txtS}");
}
}
public int GetSystemImageListIndex(IntPtr pidl, ShellIconType type, ShellIconFlags flags) {
var info = new SHFILEINFO();
IntPtr result = Shell32.SHGetFileInfo(pidl, 0, out info, Marshal.SizeOf(info),
SHGFI.Icon | SHGFI.SysIconIndex | SHGFI.OverlayIndex | SHGFI.PIDL | (SHGFI)type | (SHGFI)flags);
if (result == IntPtr.Zero) {
throw new Exception("Error retrieving shell folder icon");
}
User32.DestroyIcon(info.hIcon);
return info.iIcon;
}
/*
public void SetSize(int size) {
ImageList_Destroy(this.Handle);
this._ImageList = Marshal.GetObjectForIUnknown(ImageList_Create(size, size, 0x00020000 | 0x00000020, 30, 30)) as IImageList2;
this._ImageList.SetImageCount(3000);
}
private Lazy<Int32Size> _SizePixels;
public ImageListSize Size {
get {
return this._Size;
}
}
public int Width {
get {
return this._SizePixels.Value.Width;
}
}
public int Height {
get {
return this._SizePixels.Value.Height;
}
}
*/
/*
private IntPtr Handle {
get {
return Marshal.GetIUnknownForObject(this._ImageList);
}
}
*/
/*
public static ImageListSize MaxSize {
get {
if (Environment.OSVersion.Platform == PlatformID.Win32NT) {
if (Environment.OSVersion.Version.Major >= 6) {
return ImageListSize.Jumbo;
}
else {
return ImageListSize.ExtraLarge;
}
}
return ImageListSize.Jumbo;
}
}
*/
#endregion
#region Method
/*
[Obsolete("Consider Inlining")]
private int GetIconIndex(IntPtr path) {
var options = SHGetFileInfoOptions.SysIconIndex | SHGetFileInfoOptions.Pidl;
var shfi = new SHFILEINFO();
var shfiSize = Marshal.SizeOf(shfi.GetType());
IntPtr retVal = Win32Api.SHGetFileInfo(path, FileAttributes.None, ref shfi, shfiSize, options);
if (shfi.hIcon != IntPtr.Zero) {
Win32Api.DestroyIcon(shfi.hIcon);
}
if (retVal.Equals(IntPtr.Zero)) {
throw new Win32Exception(Marshal.GetLastWin32Error());
}
else {
return shfi.iIcon;
}
}
*/
/// <summary>
///
/// </summary>
/// <param name="path"></param>
/// <param name="overlayIndex">Index of the overlay icon that use for Draw or GetIndexOfOverlay method.</param>
/// <returns></returns>
public int GetIconIndexWithOverlay(IntPtr path, out int overlayIndex) {
var options = SHGetFileInfoOptions.SysIconIndex | SHGetFileInfoOptions.OverlayIndex | SHGetFileInfoOptions.Icon | SHGetFileInfoOptions.AddOverlays | SHGetFileInfoOptions.Pidl;
var shfi = new SHFILEINFO();
var shfiSize = Marshal.SizeOf(shfi.GetType());
IntPtr retVal = Win32Api.SHGetFileInfo(path, FileAttributes.None, ref shfi, shfiSize, options);
if (shfi.hIcon != IntPtr.Zero) {
Win32Api.DestroyIcon(shfi.hIcon);
}
if (retVal.Equals(IntPtr.Zero)) {
//throw new Win32Exception(Marshal.GetLastWin32Error());
overlayIndex = 0;
return 0;
}
else {
/* brakes stack on optimized build
int idx = shfi.iIcon & 0xFFFFFF;
int iOverlay = shfi.iIcon >> 24;
overlayIndex = iOverlay;
return idx;
*/
overlayIndex = shfi.iIcon >> 24;
return shfi.iIcon & 0xFFFFFF;
}
}
public static extern IntPtr SHGetFileInfo(IntPtr pszPath, FileAttributes attr, ref SHFILEINFO psfi, int cbSizeFileInfo, SHGetFileInfoOptions uFlags);
private void UpdateIconCacheForFolder(String wszPath) {
var sfi = new SHFILEINFO();
var res = Shell32.SHGetFileInfo(Marshal.StringToHGlobalAuto(wszPath), 0, out sfi, (Int32)Marshal.SizeOf(sfi),
SHGFI.IconLocation);
Int32 iIconIndex = Shell32.Shell_GetCachedImageIndex(sfi.szDisplayName.Replace(@"\\", @"\"), sfi.iIcon, 0);
Shell32.SHUpdateImage(sfi.szDisplayName.Replace(@"\\", @"\"), sfi.iIcon, 0x0002, iIconIndex);
Shell32.SHChangeNotify(Shell32.HChangeNotifyEventID.SHCNE_UPDATEIMAGE,
Shell32.HChangeNotifyFlags.SHCNF_DWORD | Shell32.HChangeNotifyFlags.SHCNF_FLUSHNOWAIT, IntPtr.Zero,
(IntPtr)sfi.iIcon);
}