/// <summary>
/// Used to access system folder icons.
/// </summary>
/// <param name="largeIcon">Specify large or small icons.</param>
/// <param name="openFolder">Specify open or closed FolderType.</param>
/// <returns>The requested Icon.</returns>
public static Icon GetFolderIcon(Boolean largeIcon, Boolean openFolder)
{
win32.SHFILEINFO sfi = new win32.SHFILEINFO();
Icon icon = null;
uint flags = win32.SHGFI_ICON | win32.SHGFI_USEFILEATTRIBUTES;
flags |= openFolder ? win32.SHGFI_OPENICON : 0;
flags |= largeIcon ? win32.SHGFI_LARGEICON : win32.SHGFI_SMALLICON;
//获取Windows文件夹的图标
string strWinDir = Directory.GetParent(Environment.GetFolderPath(Environment.SpecialFolder.System)).FullName;
//获取Windows目录图标（xp、win7等任何系统都有的）
int nTotal = (int)win32.SHGetFileInfo(strWinDir, win32.FILE_ATTRIBUTE_DIRECTORY, ref sfi, (uint)Marshal.SizeOf(sfi), flags);
//判断是否成功
if (nTotal > 0)
{
icon = (Icon)Icon.FromHandle(sfi.hIcon).Clone();
}
//销毁
if (sfi.hIcon != IntPtr.Zero)
{
win32.DestroyIcon(sfi.hIcon);
}
return(icon);
}
/// <summary>
/// 从文件扩展名得到文件关联图标
/// </summary>
/// <param name="fileName">文件名或文件扩展名</param>
/// <param name="smallIcon">是否是获取小图标，否则是大图标</param>
/// <returns>图标</returns>
public static Icon GetFileIcon(string fileName, bool smallIcon)
{
win32.SHFILEINFO sfi = new win32.SHFILEINFO();
Icon icon = null;
//到这里确定下是否是文件夹
int nTotal = (int)win32.SHGetFileInfo(fileName, 100, ref sfi, 0, (uint)(smallIcon ? 273 : 272));
//判断是否成功
if (nTotal > 0)
{
icon = (Icon)Icon.FromHandle(sfi.hIcon).Clone();
}
//销毁
if (sfi.hIcon != IntPtr.Zero)
{
win32.DestroyIcon(sfi.hIcon);
}
return(icon);
}
