Mac地址的读取（包括base64的转换）

 string mac =null;        /// <summary>        /// 获取MAC地址        /// </summary>        /// <returns>mac地址</returns>        public  ReadMac()//获取本机MAC地址        {                        ManagementClass mc;            mc = new ManagementClass("Win32_NetworkAdapterConfiguration");            ManagementObjectCollection moc = mc.GetInstances();            foreach (ManagementObject mo in moc)            {                if (mo["IPEnabled"].ToString() == "True")                    mac = mo["MacAddress"].ToString();            }                    }        /// <summary>        /// mac地址转换成base64字符        /// </summary>        /// <param name="mac">原始mac地址</param>        /// <returns>转换后的mac地址</returns>        public  string ChangeMac()        {            if (mac != null)            {                string str = mac.Replace(":", "");//去除mac中的":"                var strMac = Encoding.Default.GetBytes(str);//对其中字符进行编码                string endStr = Convert.ToBase64String(strMac);//将编码后的字符转换成base64                //string endStr = Encoding.Default.GetString(strMac);                return endStr;            }            else            {                return "Mac地址转换失败";            }        }        /// <summary>        /// Mac base64后的解码        /// </summary>        /// <param name="str">base64编码字符</param>        /// <returns>原始去除“：”的Mac</returns>        public  string firstMac()        {            //var baseStr = Convert.FromBase64String (str);            //string firstStr = Encoding.Default.GetString(baseStr);            if (mac != null)            {                string firstStr = mac.Replace(":", "");                return firstStr;            }            else            {                return "本机Mac请求失败";            }        }        /// <summary>        /// 检查Mac地址是否匹配        /// </summary>        /// <param name="url">服务器路径</param>        /// <returns></returns>        public int CheckMac(string url)        {            string strCheckMac= PostUpload.PostMoth(url,"mac="+ ChangeMac() , Encoding.Default);//true上传成功，false上传失败            if (strCheckMac == "true")            {                return 1;            }            else            {                return 0;            }        }    }