Add/Remove Windows Scheduled Tasks programatically through C#?

[kkkanoor]

I am trying to schedule tasks in Windows from my C# program. The tasks get listed in Windows Schedule Tasks list, but it is not getting invoked. It seems I need to give the user name and password to start the task
OR
I have to set the property "RunOnlyIfLoggedOn" to true. But I don't know how to do this. Please help.

The following code I used is posted in one of the forums. Please find the code below.

--- CODE ---
simply use System.Diagnostics.Process.Start and issue an AT command.
Another option is to use the Management classes and the WMI class 'Win32_ScheduledJob'

Following a small sample to get you started:

using System;
using System.Management;
using System.Reflection;
class ScheduleJob
{
public static uint Create(string Command,uint DaysOfMonth,uint DaysOfWeek,
bool InteractWithDesktop,bool RunRepeatedly,string StartTime, // in DMTF format !
out uint JobId)
{
// See: Platform SDK (or WMI SDK) doc's for detailed info about 'Win32_ScheduledJob' class
ManagementBaseObject inputArgs = null;
ManagementClass classObj = new ManagementClass(null, "Win32_ScheduledJob", null);
inputArgs = classObj.GetMethodParameters("Create");
inputArgs["Command"] = Command;
inputArgs["DaysOfMonth"] = DaysOfMonth;
inputArgs["DaysOfWeek"] = DaysOfWeek;
inputArgs["InteractWithDesktop"] = InteractWithDesktop;
inputArgs["RunRepeatedly"] = RunRepeatedly;
inputArgs["StartTime"] = StartTime;
// use late binding to invoke "Create" method on "Win32_ScheduledJob" WMI class
ManagementBaseObject outParams = classObj.InvokeMethod("Create", inputArgs, null);
JobId = ((uint)(outParams.Properties["JobId"].Value));
return ((uint)(outParams.Properties["ReturnValue"].Value));
}
// Delete the Scheduled (JobID)

public static uint Delete(uint JobID) {
ManagementObject mo;
ManagementPath path = ManagementPath.DefaultPath;
path.RelativePath = "Win32_ScheduledJob.JobId=" + "\"" + JobID + "\"";
mo = new ManagementObject(path);
ManagementBaseObject inParams = null;
// use late binding to invoke "Delete" method on "Win32_ScheduledJob" WMI class
ManagementBaseObject outParams = mo.InvokeMethod("Delete", inParams, null);
return ((uint)(outParams.Properties["ReturnValue"].Value));
}

public static string ToDMTFTime(DateTime dateParam)
{
string tempString = dateParam.ToString("********HHmmss.ffffff");
TimeSpan tickOffset = TimeZone.CurrentTimeZone.GetUtcOffset(dateParam);
tempString += (tickOffset.Ticks >= 0) ? '+' : '-';
tempString += (Math.Abs(tickOffset.Ticks) / System.TimeSpan.TicksPerMinute).ToString("d3");
return tempString;
}
}

class JobScheduler {
public static void Main() {
uint JobID;
DateTime dt = DateTime.Now; // Get current DateTime
dt = dt.AddMinutes(1); //add 1 minute to current time
string LocalDateTime = ScheduleJob.ToDMTFTime(dt); // convert to DMTF format
// Schedule Notepad to run every Sunday and Wednesday
uint ret = ScheduleJob.Create(
// @"runas /user:administrator\domain /profile cmd ",
@"c:\winnt\notepad.exe",
0, 32, true, true, LocalDateTime, out JobID);
if(ret == 0) // sucess
{
Console.WriteLine("Wait for Job to be scheduled and Press: <Enter> to delete");
Console.ReadLine(); // For test purposes - Wait for job to be scheduled.
ret = ScheduleJob.Delete(JobID); // Get rid of this Job
}
Console.WriteLine(ret);
}
}

/* Days of week
Sunday 64,
Monday 1,
Tuesday 2,
Wednesday 4,
Thursday 8,
Friday 16,
Saturday 32

*/