/// <summary>
/// Returns an icon for a given file - indicated by the name parameter.
/// </summary>
/// <param name="name">Pathname for file.</param>
/// <param name="size">Large or small</param>
/// <param name="linkOverlay">Whether to include the link icon</param>
/// <returns>System.Drawing.Icon</returns>
public static SIcon GetFileIcon(string name, IconSize size, bool linkOverlay)
{
var shfi = new Shell32.Shfileinfo();
var flags = Shell32.ShgfiIcon | Shell32.ShgfiUsefileattributes;
if (linkOverlay)
{
flags += Shell32.ShgfiLinkoverlay;
}
/* Check the size specified for return. */
if (IconSize.Small == size)
{
flags += Shell32.ShgfiSmallicon;
}
else
{
flags += Shell32.ShgfiLargeicon;
}
Shell32.SHGetFileInfo(name,
Shell32.FileAttributeNormal,
ref shfi,
(uint)Marshal.SizeOf(shfi),
flags);
// Copy (clone) the returned icon to a new object, thus allowing us to clean-up properly
var icon = (SIcon)SIcon.FromHandle(shfi.hIcon).Clone();
User32.DestroyIcon(shfi.hIcon); // Cleanup
return(icon);
}
public static SDIcon GetIconFromList(IntPtr iconList, int index, int flags = ILD_TRANSPARENT)
{
IntPtr hIcon = ImageList_GetIcon(iconList, index, flags);
if (hIcon != IntPtr.Zero)
{
var managedIcon = SDIcon.FromHandle(hIcon).Clone() as SDIcon;
DestroyIcon(hIcon);
return(managedIcon);
}
return(null);
}
/// <summary>
/// The meat and potatoes of the get icon functions above. Gets an icon based on the
/// given path and flags. Will attempt to fetch icons from Image Lists if they use
/// those (eg: .lnk/.url files).
/// </summary>
/// <param name="path">The path to get the icon for.</param>
/// <param name="flags">A bitfield representing flags to pass to
/// <see cref="Trampolines.ShellGetFileInfo(string, FileAttributes, uint)"/></param>
/// <param name="attribs">FileAttributes of the given path.</param>
/// <returns>The requested icon.</returns>
private static SDIcon GetIcon(string path, uint flags, FileAttributes attribs = 0)
{
(SHFILEINFO info, IntPtr list) = Trampolines.ShellGetFileInfo(path, attribs, flags);
SDIcon icon = null;
if (info.hIcon != IntPtr.Zero)
{
icon = SDIcon.FromHandle(info.hIcon).Clone() as SDIcon;
DestroyIcon(info.hIcon);
return(icon);
}
else if (list != IntPtr.Zero && info.iIcon != IntPtr.Zero)
{
icon = Trampolines.GetIconFromList(list, info.iIcon.ToInt32());
}
return(icon);
}
