在 HangFire 中设置特定的日期和时间

Question

如何设置具体时间？例如 7/2/2021 8:00 上午。
我应该使用哪些方法？ Enqueue 方法或 Schedule 方法或 AddOrUpdate 方法？

Answer 1

Hangfire 使用 cron 调度表达式。您可以设置任何您想要的日期时间表达式。例如

0 8 24 7 * => “At 08:00 on day-of-month 24 in July.”

下面的代码展示了如何使用表达式，您可以使用一些在线工具来创建表达式，例如crontab。

RecurringJob.AddOrUpdate(jobId, methodCall, "0 8 24 7 *", TimeZoneInfo.Local);

如果你想执行一次你应该使用 BackgroundJob。

var selectedDate = DateTimeOffset.Parse("2021-07-02 08:00:00");
BackgroundJob.Schedule(() => YourDelayedJob(), selectedDate);

Answer 2

来自文档：

Delayed jobs

Delayed jobs are executed only once too, but not immediately, after a certain time interval.

var jobId = BackgroundJob.Schedule(
              () => Console.WriteLine("Delayed!"),
                    TimeSpan.FromDays(7));

Sometimes you may want to postpone a method invocation; for example, to send an email to newly registered users a day after their registration. To do this, just call the BackgroundJob.Schedule method and pass the desired delay

https://docs.hangfire.io/en/latest/background-methods/calling-methods-with-delay.html

Answer 3

如果您只有预定日期：

DateTime dateSchedule = new DateTime(2021, 2, 7);
BackgroundJob.Schedule(job, dateSchedule - DateTime.Now);

只需添加日期验证，使预定日期 (dateSchedule) 不在过去。

在 HangFire 中设置特定的日期和时间

set a specific Date And Time in HangFire

c#

asp.net

scheduler

hangfire