C# IdHelper 系统编码系统序号帮助类

    /// <summary>
    /// 系统编码帮助类
    /// </summary>
    public class IdHelper
    {

        /// <summary>
        /// 获取时间序号，如：20231024152456756000
        /// </summary>
        /// <param name="randomSuffix">尾部随机数长度</param>
        /// <returns></returns>
        public static string GetTimeId(int randomSuffix = 3)
        {
            var str = DateTime.Now.ToString("yyyyMMddHHmmssfff");
            var tmp = "";
            for (int i = 1; i <= randomSuffix; i++) tmp += "9";
            var value = new Random().Next(1, Int32.Parse(tmp));
            return str + value;
        }

        /// <summary>
        /// 获取GUID序号，自动转小写
        /// </summary>
        /// <returns></returns>
        public static string GetGuid()
        {
            return Guid.NewGuid().ToString().ToLower();
        }

        /// <summary>
        /// 将GUID转换为最长16位的序号字符串
        /// </summary>
        /// <param name="removeZero">移除后面的000,d6acd6cb8621a000==>d6acd6cb8621a</param>
        /// <returns></returns>
        public static string GetShortGuid(bool removeZero = true)
        {
            long result = 1;
            int index = 1;
            byte[] bs = Guid.NewGuid().ToByteArray();

            foreach (byte b in bs)
            {
                result *= ((int)b + index * 2);
                index++;
            }

            var hex = string.Format("{0:x}", result);

            //d6acd6cb8621a000==>d6acd6cb8621a
            if (removeZero)//移除后面的000
            {
                while (hex.Substring(hex.Length - 1, 1) == "0")
                    hex = hex.Substring(0, hex.Length - 1);
            }

            return hex;
        }

    }