Is it possible to use Windows 7 Task scheduler in own application

Question

I'm developing add-on based application. Every add-on use scheduler. Loaded add-on schedule task. My application run only one instance. Sometimes application closed, sometimes running. Therefore i need to use Windows 7 Task scheduler

How to use task scheduler on own application?

I need create new task from application
I need that when task finish, Send message to my application or invoke any function of my application
Is it possible?
How to do it?

Answer 1

Check out this project at CodeProject.

A New Task Scheduler Class Library for .NET

Answer 2

If you want to interact with the Windows 7 Scheduled Tasks system from your code to create, manage, or delete a task that is no problem. (I cover this in the Windows 7 course I wrote for Pluralsight.) Add a COM reference to TaskScheduler and you then do this sort of thing:

        ITaskService scheduler = new TaskSchedulerClass();
        scheduler.Connect(null, null, null, null);

        ITaskFolder rootFolder = scheduler.GetFolder("\\");
        ITaskFolder folder = rootFolder.GetFolders(0).Cast<ITaskFolder>().FirstOrDefault(f => f.Name == "Windows7Course");
        if (folder == null)
        {
            folder = rootFolder.CreateFolder("Windows7Course", null);
        }

        ITaskDefinition task = scheduler.NewTask(0);
        IExecAction action = (IExecAction)task.Actions.Create(_TASK_ACTION_TYPE.TASK_ACTION_EXEC);

        action.Path = typeof(SayHello.Form1).Assembly.Location;
        action.WorkingDirectory = Path.GetDirectoryName(typeof(SayHello.Form1).Assembly.Location);

        ISessionStateChangeTrigger trigger = (ISessionStateChangeTrigger)task.Triggers.Create(_TASK_TRIGGER_TYPE2.TASK_TRIGGER_SESSION_STATE_CHANGE);
        trigger.StateChange = _TASK_SESSION_STATE_CHANGE_TYPE.TASK_SESSION_UNLOCK;

        task.Settings.DisallowStartIfOnBatteries = true;

        task.RegistrationInfo.Author = "Kate Gregory";
        task.RegistrationInfo.Description = "Launches a greeting.";

        IRegisteredTask ticket = folder.RegisterTaskDefinition("GreetReturningUser", task, (int)_TASK_CREATION.TASK_CREATE_OR_UPDATE, null, null, _TASK_LOGON_TYPE.TASK_LOGON_INTERACTIVE_TOKEN, null);

This particular sample runs an exe that is in the same solution (another project). You would have to adjust the Action.Path, Action.WorkingDirectory etc to meet your needs.