How to perform CRUD operation on Schedule in AngularJS?

<ej-schedule style="float: left" id="Schedule1" e-appointmentsettings-datasource="appointments" e-appointmentsettings-applytimeoffset="false" e-appointmentsettings-id="Id" e-appointmentsettings-subject="Subject" e-appointmentsettings-starttime="StartTime"
                             e-appointmentsettings-endtime="EndTime" e-appointmentsettings-description="Description" e-appointmentsettings-allday="AllDay" e-appointmentsettings-recurrence="Recurrence" e-appointmentsettings-recurrencerule="RecurrenceRule"
                             e-width="100%" e-height="525px" e-currentview="setWeek" e-currentdate="setDate">
 </ej-schedule>

window.myApp= ej.DataManager({
            url: "/Home/GetData",
            crudUrl: "/Home/Batch",
            crossDomain: true, adaptor: new ej.UrlAdaptor()
        });
 
angular.module('syncApp', ['ejangular'])
        .controller('ScheduleCtrl', function ($scope) {
             $scope.appointments = window.myApp;
             $scope.setDate = new Date(2017, 4, 5);
             $scope.setWeek = "week";
        });

public JsonResult GetData()
        {
            IEnumerable data = new ScheduleDataDataContext().Appointments.Take(100); // nw.Appointment.Take(5);
            return Json(data, JsonRequestBehavior.AllowGet);
        }
        public JsonResult Batch(EditParams param)
        {
            if (param.action == "insert" || (param.action == "batch" && param.added != null)) // this block of code will execute while inserting the appointments
            {
                var value = param.action == "insert" ? param.value : param.added[0];
                int intMax = db.Appointments.ToList().Count > 0 ? db.Appointments.ToList().Max(p => p.Id) : 1;
                DateTime startTime = Convert.ToDateTime(value.StartTime);
                DateTime endTime = Convert.ToDateTime(value.EndTime);
                var currentTimeZone = TimeZone.CurrentTimeZone;
                Appointment appoint = new Appointment()
                {
                    Id = intMax + 1,
                    StartTime = startTime,
                    EndTime = endTime,
                    Subject = value.Subject,
                    Recurrence = value.Recurrence,
                    AllDay = value.AllDay,
                    RecurrenceRule = value.RecurrenceRule,
                };
                db.Appointments.InsertOnSubmit(appoint);
                db.SubmitChanges();
            }
            if (param.action == "remove" || param.deleted != null)  // this block of code will execute while removing the appointment
            {
                if (param.action == "remove")
                {
                    int key = Convert.ToInt32(param.key);
                    Appointment app = db.Appointments.Where(c => c.Id == key).FirstOrDefault();
                    if (app != null) db.Appointments.DeleteOnSubmit(app);
                }
                else
                {
                    foreach (var apps in param.deleted)
                    {
                        Appointment app = db.Appointments.Where(c => c.Id == apps.Id).FirstOrDefault();
                        if (apps != null) db.Appointments.DeleteOnSubmit(app);
                    }
                }
                db.SubmitChanges();
            }
            if ((param.action == "batch" && param.changed != null) || param.action == "update")   // this block of code will execute while updating the appointment
            {
                var value = param.action == "update" ? param.value : param.changed[0];
                var filterData = db.Appointments.Where(c => c.Id == Convert.ToInt32(value.Id));
 
                if (filterData.Count() > 0)
                {
                    DateTime startTime = Convert.ToDateTime(value.StartTime);
                    DateTime endTime = Convert.ToDateTime(value.EndTime);
                    Appointment appoint = db.Appointments.Single(A => A.Id == Convert.ToInt32(value.Id));
                    appoint.StartTime = startTime;
                    appoint.EndTime = endTime;
                    appoint.Subject = value.Subject;
                    appoint.Recurrence = value.Recurrence;
                    appoint.AllDay = value.AllDay;
                    appoint.RecurrenceRule = value.RecurrenceRule;
                }
                db.SubmitChanges();
            }
            IEnumerable data = new ScheduleDataDataContext().Appointments.Take(500); // nw.Appointment.Take(5);
            return Json(data, JsonRequestBehavior.AllowGet);
        }      
    }