本文实例为大家分享了C#生成唯一订单号的具体代码，供大家参考，具体内容如下

根据GUID+DateTime.Now.Ticks生产唯一订单号

/// <summary> /// 生成唯一数 /// </summary> public class UniqueData { private static object obj = new object(); private static int GuidInt { get { return Guid.NewGuid().GetHashCode(); } } private static string GuidIntStr { get { return Math.Abs(GuidInt).ToString(); } } /// <summary> /// 生成 /// </summary> /// <param name="mark">前缀</param> /// <param name="timeType">时间精确类型 1 日,2 时,3 分，4 秒(默认) </param> /// <param name="id">id 小于或等于0则随机生成id</param> /// <returns></returns> public static string Gener(string mark, int timeType = 4, int id = 0) { lock (obj) { var number = mark; var ticks = (DateTime.Now.Ticks - GuidInt).ToString(); int fillCount = 0;//填充位数 number += GetTimeStr(timeType, out fillCount); if (id > 0) { number += ticks.Substring(ticks.Length - (fillCount + 3)) + id.ToString().PadLeft(10, '0'); } else { number += ticks.Substring(ticks.Length - (fillCount + 3)) + GuidIntStr.PadLeft(10, '0'); } return number; } } /// <summary> /// 生成 /// </summary> /// <param name="mark">前缀</param> /// <param name="timeType">时间精确类型 1 日,2 时,3 分，4 秒(默认)</param> /// <param name="id">id 小于或等于0则随机生成id</param> /// <returns></returns> public static string GenerLong(string mark, int timeType = 4, long id = 0) { lock (obj) { var number = mark; var ticks = (DateTime.Now.Ticks - GuidInt).ToString(); int fillCount = 0;//填充位数 number += GetTimeStr(timeType, out fillCount); if (id > 0) { number += ticks.Substring(ticks.Length - fillCount) + id.ToString().PadLeft(19, '0'); } else { number += GuidIntStr.PadLeft(10, '0') + ticks.Substring(ticks.Length - (9 + fillCount)); } return number; } } /// <summary> /// 获取时间字符串 /// </summary> /// <param name="timeType">时间精确类型 1 日,2 时,3 分，4 秒(默认)</param> /// <param name="fillCount">填充位数</param> /// <returns></returns> private static string GetTimeStr(int timeType, out int fillCount) { var time = DateTime.Now; if (timeType == 1) { fillCount = 6; return time.ToString("yyyyMMdd"); } else if (timeType == 2) { fillCount = 4; return time.ToString("yyyyMMddHH"); } else if (timeType == 3) { fillCount = 2; return time.ToString("yyyyMMddHHmm"); } else { fillCount = 0; return time.ToString("yyyyMMddHHmmss"); } } }

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