/// <summary>
/// Used to access system folder icons.
/// </summary>
/// <param name="size">Specify large or small icons.</param>
/// <param name="folderType">Specify open or closed FolderType.</param>
/// <returns>System.Drawing.Icon</returns>
public static Icon GetFolderIcon(IconSize size, FolderType folderType)
{
// Need to add size check, although errors generated at present!
uint flags = NativeMethods.SHGFI_ICON | NativeMethods.SHGFI_USEFILEATTRIBUTES;
if (folderType == FolderType.Open)
{
flags += NativeMethods.SHGFI_OPENICON;
}
flags += size == IconSize.Small ? NativeMethods.SHGFI_SMALLICON : NativeMethods.SHGFI_LARGEICON;
// Get the folder icon
NativeMethods.SHFILEINFO shfi = new NativeMethods.SHFILEINFO();
NativeMethods.SHGetFileInfo(@"Q:\Temp", //Must be a valid path, even if the drive doesn't exist
NativeMethods.FILE_ATTRIBUTE_DIRECTORY,
ref shfi,
(uint)Marshal.SizeOf(shfi),
flags);
// Now clone the icon, so that it can be successfully stored in an ImageList
var icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
if (NativeMethods.DestroyIcon(shfi.hIcon) == 0) // Cleanup
{
throw new Win32Exception();
}
return(icon);
}
/// <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 Icon GetPathIcon(string name, IconSize size, bool linkOverlay)
{
NativeMethods.SHFILEINFO shfi = new NativeMethods.SHFILEINFO();
uint flags = NativeMethods.SHGFI_ICON | NativeMethods.SHGFI_USEFILEATTRIBUTES;
if (linkOverlay)
{
flags += NativeMethods.SHGFI_LINKOVERLAY;
}
flags += size == IconSize.Small ? NativeMethods.SHGFI_SMALLICON : NativeMethods.SHGFI_LARGEICON;
NativeMethods.SHGetFileInfo(name,
Directory.Exists(name) ? NativeMethods.FILE_ATTRIBUTE_DIRECTORY : NativeMethods.FILE_ATTRIBUTE_NORMAL,
ref shfi,
(uint)Marshal.SizeOf(shfi),
flags);
// Copy (clone) the returned icon to a new object, thus allowing us to clean-up properly
Icon icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
if (NativeMethods.DestroyIcon(shfi.hIcon) == 0) // Cleanup
{
throw new Win32Exception();
}
return(icon);
}
