/// <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 GetFileIcon(string name, IconSize size, bool linkOverlay)
{
var shfi = new NKnife.Win.Api.Shell32.Shfileinfo();
var flags = NKnife.Win.Api.Shell32.SHGFI_ICON | NKnife.Win.Api.Shell32.SHGFI_USE_FILE_ATTRIBUTES;
if (linkOverlay)
{
flags += NKnife.Win.Api.Shell32.SHGFI_LINK_OVERLAY;
}
/* Check the size specified for return. */
if (IconSize.Small == size)
{
flags += NKnife.Win.Api.Shell32.SHGFI_SMALL_ICON;
}
else
{
flags += NKnife.Win.Api.Shell32.SHGFI_LARGE_ICON;
}
NKnife.Win.Api.Shell32.SHGetFileInfo(name,
NKnife.Win.Api.Shell32.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
var icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
Api.User32.DestroyIcon(shfi.hIcon);// Cleanup
return(icon);
}
/// <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!
var flags = NKnife.Win.Api.Shell32.SHGFI_ICON | NKnife.Win.Api.Shell32.SHGFI_USE_FILE_ATTRIBUTES;
if (FolderType.Open == folderType)
{
flags += NKnife.Win.Api.Shell32.SHGFI_OPEN_ICON;
}
if (IconSize.Small == size)
{
flags += NKnife.Win.Api.Shell32.SHGFI_SMALL_ICON;
}
else
{
flags += NKnife.Win.Api.Shell32.SHGFI_LARGE_ICON;
}
// Get the folder icon
var shfi = new NKnife.Win.Api.Shell32.Shfileinfo();
NKnife.Win.Api.Shell32.SHGetFileInfo(null,
NKnife.Win.Api.Shell32.FILE_ATTRIBUTE_DIRECTORY,
ref shfi,
(uint)Marshal.SizeOf(shfi),
flags);
Icon.FromHandle(shfi.hIcon); // Load the icon from an HICON handle
// Now clone the icon, so that it can be successfully stored in an ImageList
var icon = (Icon)Icon.FromHandle(shfi.hIcon).Clone();
Api.User32.DestroyIcon(shfi.hIcon); // Cleanup
return(icon);
}
