CODEWITHSUNDEEP
.netwindowsc#-4.0scheduled-tasks
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Reputation: 13068

Create win task to run once and delete immediately using C#

Here is the use case: - Create a new win task, run immediately and once complete, delete the task.

Here is basic code to create a task using C#. 

    using (TaskService ts = new TaskService(null))
    {
        string projectName = "runnowtest" + Guid.NewGuid().ToString();

        //create new task
        TaskDefinition td = ts.NewTask();
        Trigger mt = null;

        //setup task as Registration trigger
        mt = td.Triggers.AddNew(TaskTriggerType.Registration);
        mt.StartBoundary = DateTime.Now;

        //delete the task 1 minute after the program ends
        td.Settings.DeleteExpiredTaskAfter = new TimeSpan(0, 1, 0); 

        //run the notepad++ in the task
        td.Actions.Add(new ExecAction("notepad.exe"));

        //register task
        Task output = ts.RootFolder.RegisterTaskDefinition(projectName, td);

        //check output
        Console.WriteLine(output != null ? "Task created" : "Task not created");
    }

The API doesn't seem to have a property/flag to mark task as run once. I am trying to ensure the above task runs only once and deletes immediately after that. Any thoughts are much appreciated!

Upvotes: 2

Views: 5134

Answers (3)

Rafael Pizao
Rafael Pizao

Reputation: 841

You have a collection running tasks and you can end them using the Stop() method.
I did in the OnStop method to clean up created tasks, just take the same logic and include it where needed.

protected override void OnStop()
{
    TaskService ts = new TaskService();
    var tasks = ts.GetRunningTasks();
    foreach(var t in tasks)
    {
        t.Stop();
    }
}

Upvotes: 0

user592911
user592911

Reputation: 31

I know its old but for reference... To use DeleteExpiredTaskAfter you need to give trigger EndBoundary:

var trigger = new RegistrationTrigger{Delay = TimeSpan.FromSeconds(5), EndBoundary = DateTime.Now.Add(TimeSpan.FromSeconds(50))};

Upvotes: 3

Ben
Ben

Reputation: 35613

You can set the task XML definition to set all the things not exposed directly by the API.

Upvotes: 0

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