防止石英在加载后立即运行作业

我有一个石英作业，计划在特定时间运行，但是一旦加载作业，它就会运行一次，而不考虑时间，然后在计划的时间再次运行。

如何限制它仅在计划时间运行而不是在加载后立即运行？

public void Initialze()
    {
        _schedulerFactory = new StdSchedulerFactory();
        _scheduler = _schedulerFactory.GetScheduler();
        _scheduler.Start();            
    }
 public StatusObject AddJobToQuartzScheduler(T_BIT_Scheduler item)
    {
        return AddJobToQuartzScheduler(new QuartzModel { BeginDateTime = item.BeginDateTime, IdeaId = item.IdeaId, IsActive = item.IsActive, SchedulerExpression = item.SchedulerExpression, SchedulerID = item.SchedulerID, SchedulerName = item.SchedulerName, SchedulerType = item.SchedulerType });
    }

    public StatusObject AddJobToQuartzScheduler(QuartzModel quartzData, bool AddToDB = false)
    {
        IGlobalFunction globalFunction = new GlobalFunction();
        try
        {
            int schedulerId = quartzData.SchedulerID;
            if (AddToDB)
            {
                using (var dbContext = new DBEntities())
                {
                    IQuartzRepository quartzRepository = new QuartzRepository(dbContext);
                    schedulerId = quartzRepository.Add(new T_BIT_Scheduler { BeginDateTime = quartzData.BeginDateTime, IdeaId = quartzData.IdeaId, IsActive = quartzData.IsActive, SchedulerExpression = quartzData.SchedulerExpression, SchedulerName = quartzData.SchedulerName, SchedulerType = quartzData.SchedulerType }).SchedulerID;
                }
            }

            CronExpression cron = new CronExpression(quartzData.SchedulerExpression);
            if (cron.GetNextValidTimeAfter(DateTime.Now) == null)
            {
                globalFunction.FailureObject("Invalid Time");
            }
            ITrigger trigger = TriggerBuilder.Create()
                .WithIdentity(quartzData.SchedulerName + "Trigger", "BrightIdeaGroup")
                .StartAt(quartzData.BeginDateTime)
                .WithCronSchedule(cron.CronExpressionString)
                .Build();
            //task.TaskName+"Job" is added to give unique job name
            IJobDetail job = JobBuilder.Create<QuartzJob>()
                       .WithIdentity(schedulerId + "Job", "ScheduledJobGroup")
                       .UsingJobData("IdeaID", quartzData.IdeaId)
                        .UsingJobData("Type", quartzData.SchedulerType)
                       .Build();
            // Tell quartz to schedule the job using our trigger
            _scheduler.ScheduleJob(job, trigger);
            return globalFunction.SuccessObject("Successfully Added the job");
        }
        catch (Exception e)
        {
            return globalFunction.FailureObject(e.Message);
        }
        // log if a job failed to get add

    }