powershell - 编辑 Windows 任务计划程序任务的触发器

Question

我们目前在我们的 server 2008 机器上的 Windows 任务计划程序中安排了数百个任务。有许多任务无限期地每半小时运行一次。有没有办法使用脚本来更改这些任务的触发器，以便它们只会每半小时 MF 运行一次？

Answer 1

是的，如果您使用TaskService COM 对象。有关使用此对象的一些示例脚本，请参阅以下内容：

1. 在 Windows 7、Windows Server 2008 和 Windows Vista 中重命名计划任务

2. 操作方法：使用 PowerShell 报告计划任务

3. 更新计划任务的凭据

   脚本：https ://gist.github.com/Bill-Stewart/363fdf761499a071439c8ac0c18dcd54

在 Windows XP/Server 2003 之后，使用 schtasks.exe 实用程序相当有限。

Answer 2

Here are the allowed options for /SC:

/SC allows for the following frequency schedules:
        MINUTE:     1 - 1439 minutes.
        HOURLY:     1 - 23 hours.
        DAILY:      1 - 365 days.
        WEEKLY:     weeks 1 - 52. (/D MON,TUE,WED,THU,FRI,SAT,SUN)
        ONCE:       No modifiers.
        ONSTART:    No modifiers.
        ONLOGON:    No modifiers.
        ONIDLE:     No modifiers.
        MONTHLY:    1 - 12, or FIRST, SECOND, THIRD, FOURTH, LAST, LASTDAY.**

I keep editing this because I'm not happy with my findings...

I have looked into the SCHTASKS and noticed that you cannot CHANGE for the schedule through CMD.

From technet.microsoft
Changes one or more of the following properties of a task.

• The program that the task runs (/tr).
• The user account under which the task runs (/ru).
• The password for the user account (/rp).

I am going to continue to do some research on this, and hopefully will edit this answer with a workable solution.

EDIT
If you look in C:\windows\system32\tasks you will find all of your scheduled tasks They're not listed as XML, but they are indeed XML What I think should be done is using either; VBS or C# application dig to each of the following Nodes
//Task/Triggers/CalendarTrigger to delete /ScheduleByDay and it's child node /DaysInterval //Task/Triggers/CalendarTrigger to create the following:

 <?xml version="1.0" encoding="UTF-16"?>
   -<Task xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task" version="1.2"> 
     +<RegistrationInfo> 
     -<Triggers> 
       -<CalendarTrigger>
            <StartBoundary>2013-03-13T15:20:00</StartBoundary>
            <Enabled>true</Enabled> 
             -<ScheduleByWeek> 
               -<DaysOfWeek> 
                    <Monday/>
                    <Tuesday/> 
                    <Wednesday/> 
                    <Thursday/> 
                    <Friday/> 
                </DaysOfWeek>
                <WeeksInterval>1</WeeksInterval> 
              </ScheduleByWeek> 
       </CalendarTrigger> 
     </Triggers>

If anyone can pick up and run with this - I don't think I'll be able to do much with this in the next week.