C# Windows Schedule task此次收购task下一步执行时间

最近进行了一次需求和Windows Schedule task相关职能，通过schedule，计算下一次运行task时间。

它用于由第三方DLL实现，以下网站，以下载来自：

http://taskscheduler.codeplex.com/

1. 在Schedule Task里添加一个task。命名为“testJing”, trigger设置为每五天

添加一个Trigger，例如以下图：

2. 使用VS2012，创建一个Console Application，命名为ScheduleTaskDemo

3.加入引用。

从上述的站点下载（http://taskscheduler.codeplex.com/releases/view/120747），解压后，找到Microsoft.Win32.TaskScheduler.dll（我用的是v4.0目录下的，我建的application的.NET framework 4.5）

4. 打开program.cs文件。代码例如以下：

方法一：

using Microsoft.Win32.TaskScheduler;

      using System;

public static void Main(string[] args)

        {

            using (TaskService ts = new TaskService())

            {

                Task task = ts.FindTask("testJing");

                DateTime nextRunTime = task.NextRunTime;

                Console.WriteLine("NextRunTime:" + nextRunTime);

            }

        }

NextRunTime 就可以获取下次跑task的时间。

这是直接用Task的属性NextRunTime，以下是我自己写的方法获取next run time.

方法二：使用Task里的一系列属性来计算，代码例如以下：

        public static void Main(string[] args)
        {
            try
            {
                DateTime?

beginDateGMT = null;
                DateTime? endDateGMT = null;
                GetDaysInterval(out beginDateGMT, out endDateGMT);
                if (!beginDateGMT.HasValue || !endDateGMT.HasValue)
                {
                    throw new Exception("BeginDateGMT(" + beginDateGMT + ") or EndDateGMT(" + endDateGMT + ") is null. Please check schedule setting.");
                }
                else
                {
                    Console.WriteLine("BeginDateGMT:" + beginDateGMT + ", EndDateGMT:" + endDateGMT);
                }
            }
            catch (Exception ex)
            {
                throw;
            }

            Console.Read();
        }

        private static void GetDaysInterval(out DateTime? beginDateGMT, out DateTime? endDateGMT)
        {
            using (TaskService ts = new TaskService())
            {
                Task task = ts.FindTask("testJing");
                TaskTriggerType taskTriggerType = task.Definition.Triggers[0].TriggerType;
                //// get current day, e.g. 2014/11/10 00:00:00
                DateTime nowGMT = DateTime.Now;
                nowGMT = new DateTime(nowGMT.Year, nowGMT.Month, nowGMT.Day, 0, 0, 0);
                beginDateGMT = nowGMT;
                endDateGMT = null;
                switch (taskTriggerType)
                {
                    case TaskTriggerType.Daily:
                        DailyTrigger dailyTrigger = task.Definition.Triggers[0] as DailyTrigger;
                        if (dailyTrigger.DaysInterval > 0)
                        {
                            endDateGMT = beginDateGMT.Value.AddDays(dailyTrigger.DaysInterval);
                        }
                        else
                        {
                            throw new Exception("ScheduleType is daily, but daysInterval <= 0.");
                        }
                        break;
                    case TaskTriggerType.Weekly:
                        WeeklyTrigger weeklyTrigger = task.Definition.Triggers[0] as WeeklyTrigger;
                        if (weeklyTrigger.WeeksInterval > 0)
                        {
                            endDateGMT = beginDateGMT.Value.AddDays(weeklyTrigger.WeeksInterval * 7);
                        }
                        else
                        {
                            throw new Exception("ScheduleType is weekly, but weeksInterval <= 0.");
                        }

                        break;
                    case TaskTriggerType.MonthlyDOW:
                    case TaskTriggerType.Monthly:
                        switch (taskTriggerType)
                        {
                            case TaskTriggerType.Monthly:
                                MonthlyTrigger monthlyTrigger = task.Definition.Triggers[0] as MonthlyTrigger;
                                endDateGMT = beginDateGMT.Value.AddMonths(1);
                                break;
                            case TaskTriggerType.MonthlyDOW:
                                MonthlyDOWTrigger monthlyDOWTrigger = task.Definition.Triggers[0] as MonthlyDOWTrigger;
                                if ((monthlyDOWTrigger.WeeksOfMonth == WhichWeek.FirstWeek
                                    || monthlyDOWTrigger.WeeksOfMonth == WhichWeek.SecondWeek || monthlyDOWTrigger.WeeksOfMonth == WhichWeek.ThirdWeek
                                    || monthlyDOWTrigger.WeeksOfMonth == WhichWeek.FourthWeek || monthlyDOWTrigger.WeeksOfMonth == WhichWeek.LastWeek)
                                    && (monthlyDOWTrigger.DaysOfWeek == DaysOfTheWeek.Sunday
                                    || monthlyDOWTrigger.DaysOfWeek == DaysOfTheWeek.Monday || monthlyDOWTrigger.DaysOfWeek == DaysOfTheWeek.Tuesday
                                    || monthlyDOWTrigger.DaysOfWeek == DaysOfTheWeek.Wednesday || monthlyDOWTrigger.DaysOfWeek == DaysOfTheWeek.Thursday
                                    || monthlyDOWTrigger.DaysOfWeek == DaysOfTheWeek.Friday || monthlyDOWTrigger.DaysOfWeek == DaysOfTheWeek.Saturday))
                                {
                                    DateTime nextMonthFirstDay = new DateTime(beginDateGMT.Value.AddMonths(1).Year, beginDateGMT.Value.AddMonths(1).Month, 1, 0, 0, 0);
                                    DateTime nextMonthLastDay = nextMonthFirstDay.AddMonths(1).AddDays(-1);
                                    if (monthlyDOWTrigger.WeeksOfMonth == WhichWeek.LastWeek)
                                    {
                                        DayOfWeek? dayOfWeek = GetDayOfWeek(monthlyDOWTrigger.DaysOfWeek);
                                        while (nextMonthLastDay >= nextMonthFirstDay)
                                        {
                                            if (nextMonthLastDay.DayOfWeek == dayOfWeek.Value)
                                            {
                                                endDateGMT = nextMonthLastDay;
                                                break;
                                            }
                                            nextMonthLastDay = nextMonthLastDay.AddDays(-1);
                                        }
                                    }
                                    else
                                    {
                                        //// weeksOfMonth: 1,2,3,4; daysOfWeekForMonth:7,1,2,3,4,5,6;
                                        int weeksOfMonthInt = 0;
                                        switch (monthlyDOWTrigger.WeeksOfMonth)
                                        {
                                            case WhichWeek.FirstWeek:
                                                weeksOfMonthInt = 1;
                                                break;
                                            case WhichWeek.SecondWeek:
                                                weeksOfMonthInt = 2;
                                                break;
                                            case WhichWeek.ThirdWeek:
                                                weeksOfMonthInt = 3;
                                                break;
                                            case WhichWeek.FourthWeek:
                                                weeksOfMonthInt = 4;
                                                break;
                                            default:
                                                weeksOfMonthInt = 0;
                                                break;
                                        }

                                        if (weeksOfMonthInt > 0 && weeksOfMonthInt <= 4)
                                        {
                                            DayOfWeek? dayOfWeek = GetDayOfWeek(monthlyDOWTrigger.DaysOfWeek);
                                            int countDayOfWeek = 0;
                                            while (nextMonthLastDay >= nextMonthFirstDay)
                                            {
                                                if (nextMonthFirstDay.DayOfWeek == dayOfWeek)
                                                {
                                                    countDayOfWeek++;
                                                    if (countDayOfWeek == weeksOfMonthInt)
                                                    {
                                                        endDateGMT = nextMonthFirstDay;
                                                        break;
                                                    }
                                                }

                                                nextMonthFirstDay = nextMonthFirstDay.AddDays(1);
                                            }
                                        }
                                        else
                                        {
                                            throw new Exception("ScheduleType is monthly, but weeksOfMonth is not between 1 and 4.");
                                        }
                                    }
                                }
                                else
                                {
                                    throw new Exception("ScheduleType is monthly, but weeksOfMonth or daysOfWeekForMonth has multiple values.");
                                }
                                break;
                            default:
                                throw new Exception("ScheduleType is monthly, but scheduleByMonthType is " + taskTriggerType + ".");
                        }
                        break;
                    default:
                        throw new Exception("ScheduleType(" + taskTriggerType + ") is not in (Daily;Weekly;Monthly;).");
                }
            }
        }

        private static DayOfWeek?

GetDayOfWeek(DaysOfTheWeek daysOfTheWeek)
        {
            DayOfWeek?

dayOfWeek = null;
            switch (daysOfTheWeek)
            {
                case DaysOfTheWeek.Sunday:
                    dayOfWeek = DayOfWeek.Sunday;
                    break;
                case DaysOfTheWeek.Monday:
                    dayOfWeek = DayOfWeek.Monday;
                    break;
                case DaysOfTheWeek.Tuesday:
                    dayOfWeek = DayOfWeek.Tuesday;
                    break;
                case DaysOfTheWeek.Wednesday:
                    dayOfWeek = DayOfWeek.Wednesday;
                    break;
                case DaysOfTheWeek.Thursday:
                    dayOfWeek = DayOfWeek.Thursday;
                    break;
                case DaysOfTheWeek.Friday:
                    dayOfWeek = DayOfWeek.Friday;
                    break;
                case DaysOfTheWeek.Saturday:
                    dayOfWeek = DayOfWeek.Saturday;
                    break;
                default:
                    throw new Exception("ScheduleType is monthly, but daysOfWeek is not between Sunday and Saturday.");
            }

            return dayOfWeek;
        }

执行。就可以。

结果和方法一是一样的。

注意：方法二里。对于Monthly里。不支持选择months。自己可自行扩展。

版权声明：本文博客原创文章，博客，未经同意，不得转载。