public static FileIcon FromFile(string FileName, SHGetFileInfoConstants Flags = Flags_Default)
{
var ret = default(FileIcon);
if (Win32.SHGetFileInfo(FileName, 0, (uint)(Flags), out var shfi) == IntPtr.Zero)
{
var ErrorNumber = Win32.GetLastError();
var ErrorMessage = Win32.FormatMessage(FormatMessageFlags.FROM_SYSTEM | FormatMessageFlags.IGNORE_INSERTS, IntPtr.Zero, ErrorNumber, 0, IntPtr.Zero);
var ExceptionMessage = $@"Error #{ErrorNumber}: {ErrorMessage}";
throw new Exception(ExceptionMessage);
}
else
{
ret = new FileIcon()
{
TypeName = shfi.szTypeName,
DisplayName = shfi.szDisplayName,
ShellIcon = shfi.hIcon == IntPtr.Zero ? null : System.Drawing.Icon.FromHandle(shfi.hIcon)
};
}
return(ret);
}
Icon getIcon(bool large)
{
// Get icon index and path:
var iconPath = new StringBuilder(Win32.MAX_PATH, Win32.MAX_PATH);
Wrapped.GetIconLocation(iconPath, iconPath.Capacity, out var iconIndex);
var iconFile = iconPath.ToString();
// If there are no details set for the icon, then we must use
// the shell to get the icon for the target:
if (iconFile.Length == 0)
{
// Use the FileIcon object to get the icon:
var flags =
SHGetFileInfoConstants.SHGFI_ICON |
SHGetFileInfoConstants.SHGFI_ATTRIBUTES;
if (large)
{
flags = flags | SHGetFileInfoConstants.SHGFI_LARGEICON;
}
else
{
flags = flags | SHGetFileInfoConstants.SHGFI_SMALLICON;
}
var fileIcon = FileIcon.FromFile(Target, flags);
return(fileIcon.ShellIcon);
}
else
{
// Use ExtractIconEx to get the icon:
var hIconEx = new IntPtr[1] {
IntPtr.Zero
};
var iconCount = 0;
if (large)
{
iconCount = Win32.ExtractIconEx(
iconFile,
iconIndex,
hIconEx,
null,
1);
}
else
{
iconCount = Win32.ExtractIconEx(
iconFile,
iconIndex,
null,
hIconEx,
1);
}
// If success then return as a GDI+ object
Icon icon = null;
if (hIconEx[0] != IntPtr.Zero)
{
icon = Icon.FromHandle(hIconEx[0]);
//UnManagedMethods.DestroyIcon(hIconEx[0]);
}
return(icon);
}
}
