public static extern int SHGetFileInfo(string pszPath, uint dwFileAttributes, out SHFILEINFO psfi, uint cbfileInfo, SHGFI uFlags);
/// <summary>
/// 获取文件的默认图标,可以只是文件名，甚至只是文件的扩展名(.*)；
/// 如果想获得.ICO文件所表示的图标，则必须是文件的完整路径。
/// </summary>
/// <param name="fileName">文件名</param>
/// <param name="largeIcon">是否大图标</param>
public static Icon GetFileIcon(string fileName, bool largeIcon)
{
SHFILEINFO info = new SHFILEINFO();
int cbFileInfo = Marshal.SizeOf(info); SHGFI flags;
if (largeIcon)
{
flags = SHGFI.Icon | SHGFI.LargeIcon | SHGFI.UseFileAttributes;
}
else
{
flags = SHGFI.Icon | SHGFI.SmallIcon | SHGFI.UseFileAttributes;
}
NativeMethods.SHGetFileInfo(fileName, 256, out info, (uint)cbFileInfo, flags);
return Icon.FromHandle(info.hIcon);
}