/// <summary>
        /// 获取文件大小 by  何问起
        /// </summary>
        /// <param name="path">文件的路径（全名）</param>
        /// <returns>文件大小（字节）</returns>
        public static long  HovertreeGetFileSize(string path)
        {
            FileInfo m_fileInfo = new FileInfo(path);
            return m_fileInfo.Length;
        }