MD5加密 时间差 流水号等方法

        /// <summary>
        /// 使用TimeSpan计算两个时间差 
        /// </summary>
        /// <param name="DateTime1"></param>
        /// <param name="DateTime2"></param>
        /// <returns>Subtract:从中减去另一个TimeSpan值</returns>
        private string DateDiff(DateTime DateTime1, DateTime DateTime2)
        {
            string dateDiff = null;
            TimeSpan ts = DateTime1.Subtract(DateTime2).Duration();
            dateDiff = ts.Days.ToString() + "天" + ts.Hours.ToString() + "小时" + ts.Minutes.ToString() + "分钟" + ts.Seconds.ToString() + "秒";
            return dateDiff;
        }

        /// <summary>
        /// // 计算字符串的 MD5 哈希值，并将该哈希作为 32 字符的十六进制格式字符串返回
        /// </summary>
        /// <param name="inputStr"></param>
        /// <returns>常用于用户注册</returns>
        public string ToMD5Hash(string inputStr)
        {
            // 创建一个MD5CryptoServiceProvider对象的新实例
            MD5 newMd5 = new MD5CryptoServiceProvider();
            // 将输入的字符串转换为一个字节数组并计算哈希值。
            byte[] sourceBit = Encoding.Default.GetBytes(inputStr);
            byte[] dataBit = newMd5.ComputeHash(sourceBit);
            string directStr = BitConverter.ToString(dataBit).Replace("-", "");
            return directStr;
        }
        
        /// <summary>
        /// // 验证输入字符串经MD5转换后，是否等同于一个哈希值
        /// </summary>
        /// <param name="inputStr"></param>
        /// <param name="hash"></param>
        /// <returns>常用于用户登录</returns>
        public bool VerifyMd5Hash(string inputStr, string hash)
        {
            // 将输入字符串MD5加密
            string hashOfInput = ToMD5Hash(inputStr);

            // 创建一个StringComparer实例来比较两个哈希值
            // StringComparer.OrdinalIgnoreCase：获取 StringComparer 对象
            // 该对象执行不区分大小写的序号字符串比较。
            StringComparer comparer = StringComparer.OrdinalIgnoreCase;

            return comparer.Compare(hashOfInput, hash) == 0;
        }
        /// <summary>
        /// 生成年月日时分秒时间流水号格式
        /// </summary>
        /// <param name="now"></param>
        /// <returns></returns>
        public static string SerialNumber(DateTime now)
        {
            int year = now.Year;
            int Month = now.Month;//月部分
            int Day = now.Day;//月中的第几天
            int Hour = now.Hour;//时
            int Minute = now.Minute;//分
            int Second = now.Second; //秒            
            return year.ToString("0000") + Month.ToString("00") + Day.ToString("00") + Hour.ToString("00") + Minute.ToString("00") + Second.ToString("00");
        }
        /// <summary>
        /// 根据号以及年月日时分秒生成订单编号
        /// </summary>
        /// <param name="now"></param>
        /// <param name="berthCode"></param>
        /// <returns></returns>
        public static string SerialNumber(DateTime now, string Code)
        {
            int year = now.Year;
            int Month = now.Month;//月部分
            int Day = now.Day;//月中的第几天
            int Hour = now.Hour;//时
            int Minute = now.Minute;//分
            int Second = now.Second; //秒            
            return Code + year.ToString("0000") + Month.ToString("00") + Day.ToString("00") + Hour.ToString("00") + Minute.ToString("00") + Second.ToString("00");
        }
        /// <summary>
        /// 传过来的DateTime时间格式转换为Unix时间戳格式
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string ConventDateTimeInt(string time)
        {
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1, 0, 0, 0, 0));
            //截取时间转换为标准时间格式
            string str = time.Substring(0, 4) + "-" + time.Substring(4, 2) + "-" + time.Substring(6, 2) + " " + time.Substring(8, 2) + ":" + time.Substring(10, 2) + ":" + time.Substring(12, 2);
            DateTime nowTime = Convert.ToDateTime(str);
            long unixTime = (long)Math.Round((nowTime - startTime).TotalMilliseconds / 1000, MidpointRounding.AwayFromZero) * 1000;
            return unixTime.ToString();
        }
        /// <summary>
        /// Unix时间戳转换为DateTime类型时间
        /// </summary>
        /// <param name="d"></param>
        /// <returns></returns>
        public static System.DateTime ConvertIntDateTime(double d)
        {
            System.DateTime time = System.DateTime.MinValue;
            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
            time = startTime.AddMilliseconds(d);
            return time;
        }
        /// <summary>
        /// 时间差 
        /// </summary>
        /// <param name="now"></param>
        /// <returns></returns>
        public static int DateTimeSubtract(DateTime now)
        {
            TimeSpan time = DateTime.Now.Subtract(now);
            int hours = time.Hours;//获取小时
            int Minutes = time.Minutes;//获取分钟
            int Seconds = time.Seconds;//获取秒数
            return hours * 60 * 60 + Minutes * 60 + Seconds;
        }