/// <summary> /// （在两个时间范围内）生成随机日期 /// </summary> /// <param name="startime">开始时间</param> /// <param name="endtime">结束时间</param> /// <returns>返回随机日期，如（2014-12-25 00:00:00）</returns> public static DateTime RandomTime(DateTime startime, DateTime endtime) {     Random rd = new Random();     TimeSpan tsp = endtime - startime;     int days = rd.Next(0,tsp.Days) ;     DateTime newtime = endtime.AddDays(-days).AddHours(0).AddMinutes(0).AddSeconds(0);     return newtime; }