/// <summary>
/// 获取 Cron 表达式下一个发生时间
/// </summary>
/// <param name="expression"></param>
/// <param name="cronFormat"></param>
/// <returns></returns>
public static DateTime?GetCronNextOccurrence(string expression, CronFormat cronFormat = CronFormat.Standard)
{
// 解析 Cron 表达式
var cronExpression = CronExpression.Parse(expression, cronFormat);
// 获取下一个执行时间
var nextTime = cronExpression.GetNextOccurrence(DateTimeOffset.Now, TimeZoneInfo.Local);
return(nextTime?.DateTime);
}
/// <summary>
/// 开始执行 Cron 表达式任务
/// </summary>
/// <param name="expression">Cron 表达式</param>
/// <param name="doWhat"></param>
/// <param name="workerName"></param>
/// <param name="description"></param>
public static void Do(string expression, Action <SpareTimer, long> doWhat = default, string workerName = default, string description = default)
{
Do(() =>
{
// 解析 Cron 表达式
var cronExpression = CronExpression.Parse(expression, CronFormat.IncludeSeconds);
// 获取下一个执行时间
var nextTime = cronExpression.GetNextOccurrence(DateTimeOffset.Now, TimeZoneInfo.Local);
return(nextTime?.DateTime);
}, doWhat, workerName, description);
}
/// <summary>
/// 获取 Cron 表达式下一个发生时间
/// </summary>
/// <param name="expression"></param>
/// <param name="cronFormat"></param>
/// <returns></returns>
public static DateTimeOffset?GetCronNextOccurrence(string expression, CronFormat?cronFormat = default)
{
// 支持从配置模板读取
var realExpression = expression.Render();
// 自动化 CronFormat
if (cronFormat == default)
{
var parts = realExpression.Split(' ', StringSplitOptions.RemoveEmptyEntries);
cronFormat = parts.Length <= 5 ? CronFormat.Standard : CronFormat.IncludeSeconds;
}
// 解析 Cron 表达式
var cronExpression = CronExpression.Parse(realExpression, cronFormat.Value);
// 获取下一个执行时间
var nextTime = cronExpression.GetNextOccurrence(DateTimeOffset.UtcNow, TimeZoneInfo.Local);
return(nextTime);
}
