public ActionResult GetRunningTasks()
        {
            if (!_scheduleTaskService.HasRunningTasks())
            {
                return(Json(null));
            }

            var runningTasks = from t in _scheduleTaskService.GetRunningTasks()
                               select new
            {
                id      = t.Id,
                percent = t.ProgressPercent,
                message = t.ProgressMessage,
            };

            return(Json(runningTasks.ToArray()));
        }