Qrartz.net 在core上的学习记录 3、获取下次或下几次的运行时间

备注：以下代码是从网上摘抄

　　方法体：

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/// <summary> /// Corn表达式的运行时间 /// </summary> /// <param name="cron">表达式</param> /// <param name="times">计算次数</param> /// <param name="startTime">开始时间</param> /// <returns></returns> public static String GetCronSchdule(String cron, int times, DateTimeOffset startTime) {     String timeSchdule = "";     if (!CronExpression.IsValidExpression(cron))     {         return "Cron is Illegal!";     }     try     {           ITrigger trigger1 = TriggerBuilder.Create()           .WithCronSchedule(cron).StartAt(DateTime.Now)         .Build();         DateTimeOffset? LastTime = startTime;         Console.WriteLine(LastTime.ToString());         for (int i = 0; i < times; i++)         {             DateTimeOffset? s = trigger1.GetFireTimeAfter(LastTime);             LastTime = s;             Console.WriteLine(((DateTimeOffset)s).AddHours(8).ToString());         }     }     catch (Exception e)     {         timeSchdule = "unKnow Time!";     }     return timeSchdule; }

　　调用：

            GetCronSchdule("/5 * * ? * *", 10, DateTime.Now);

 

　如果是简单表达式，代码如下：

            ITrigger trigger1 = TriggerBuilder.Create()
                                        .WithIdentity("触发器名称", "触发器组")
                                        .StartAt(DateTime.Now.AddSeconds(180))
                                        .EndAt(DateTime.Now.AddMinutes(10))//现在开始
                                        .Build();

            var ds = trigger1.GetFireTimeAfter(DateTime.Now);
            Console.WriteLine(((DateTimeOffset)ds).ToString());