示例#1
0
        /// <summary>
        /// 取文件MD5值
        /// </summary>
        /// <param name="stream"></param>
        /// <returns></returns>
        /// <exception cref="ArgumentNullException"></exception>
        public static string FileMD5(Stream stream)
        {
            if (!stream.TrySeek()) return string.Empty;
            byte[] bs = MD5.Create().ComputeHash(stream);
            stream.TrySeek();

            return BitConverter.ToString(bs).Replace("-", "");
        }
示例#2
0
        /// <summary>
        ///  通过文件头取扩展名编号
        /// </summary>
        /// <param name="stream"></param>
        /// <returns></returns>
        public static string GetFileCode(Stream stream)
        {
            if (!stream.TrySeek()) return string.Empty;
            var r = new BinaryReader(stream);

            byte buffer = r.ReadByte();
            string bx = buffer.ToString("D3");
            buffer = r.ReadByte();
            bx += buffer.ToString("D3");

            stream.TrySeek();

            return bx;
        }