如何使用“运行用户是否登录”在任务计划中创建任务

Question

And also tell me about "Run whether user is logged on or not" in detail. to avoid future hurdles to run the created task(details about username and password)

Answer 1

To create a task in taskscheduler with the setting: " run wether user is loggd on or not " use following code:

                    var taskDefinition = taskService.NewTask();
                    taskDefinition.RegistrationInfo.Author = WindowsIdentity.GetCurrent().Name;

                    taskDefinition.RegistrationInfo.Description = "Runs Application";

                    // TaskLogonType.S4U = run wether user is logged on or not 
                    taskDefinition.Principal.LogonType = TaskLogonType.S4U; 

                    var action = new ExecAction(path, arguments);
                    taskDefinition.Actions.Add(action);
                    taskService.RootFolder.RegisterTaskDefinition("NameOfApplication", taskDefinition);

Note: I dont work with a Trigger here. You can start the created task directly from code with following code:

                    //get task:
                    var task = taskService.RootFolder.GetTasks().Where(a => a.Name == "NameOfApplication").FirstOrDefault();

                    try
                    {
                        task.Run();
                    }
                    catch (Exception ex)
                    {
                        log.Error("Error starting task in TaskSheduler with message: " + ex.Message);
                    }

Answer 2

You can set the UserId to SYSTEM and it will automatically set the option 'Run whether user is logged on or not'.

using (TaskService ts = new TaskService())
{
    var newTask = ts.NewTask();
    newTask.Principal.UserId = "SYSTEM";
    newTask.Triggers.Add(new TimeTrigger(DateTime.Now));
    newTask.Actions.Add(new ExecAction("notepad"));
    ts.RootFolder.RegisterTaskDefinition("NewTask", newTask);
}

The program executing the above code must run as Administrator.

Found this solution posted in the comments here, http://taskscheduler.codeplex.com/wikipage?title=Examples

Answer 3

ITaskFolder rootFolder = taskService.GetFolder(@"\");
rootFolder.RegisterTaskDefinition(taskName, 
                                  taskDefinition,
                                  (int)_TASK_CREATION.TASK_CREATE_OR_UPDATE,
                                  null,
                                  null, 
                                  _TASK_LOGON_TYPE.TASK_LOGON_S4U,
                                  null);

I just try to use all of _TASK_LOGON_TYPE and found that "TASK_LOGON_S4U" work for setting Run whether user is logged on or not . Details about TaskScheduler http://msdn.microsoft.com/en-us/library/windows/desktop/bb736357(v=vs.85).aspx