if (!IsPostBack)
{
 // SECTION 1: Defining the data source
 var sessiontime = from st in ndx.SessionAttendees
 join ss in ndx.Sessions on st.SessionID equals ss.SessionID
 join sts in ndx.SessionTimeSlots on ss.TimeSlotID equals sts.TimeSlotID
 where st.UserID == Convert.ToInt32(userID.Value)
 orderby sts.FromTime
 select new
 {
 FromTime = sts.FromTime,
 Duration = sts.Durationinmins,
 EndTime = sts.FromTime.AddMinutes(Convert.ToDouble(sts.Durationinmins)),
 Title = ss.Title,
 SessionAttendeeUID = st.SessionAttendeeUID,
 SessionID = st.SessionID,
 UserID = st.UserID
 };

 // SECTION 2: Extracting the current user details
 int userid = (from m in ndx.UserProfiles
 where m.Username == User.Identity.Name
 select m.UserId).First();
 userID.Value = userid.ToString();

 // SECTION 3: Setting the RadScheduler Properties (necessary)
 sessionCartScheduler.DataKeyField = "SessionAttendeeUID";
 sessionCartScheduler.DataStartField = "FromTime";
 sessionCartScheduler.DataEndField = "EndTime";
 sessionCartScheduler.DataSubjectField = "Title";

// SECTION 3.1: Attach the newly created dataSource to the control
 sessionCartScheduler.DataSource = sessiontime.ToList();

// SECTION 4: Setting further properties of RadScheduler(optional)
 var minDate = from d in sessiontime
 orderby d.FromTime
 select d.FromTime;
 if (minDate.Count() != 0)
 sessionCartScheduler.SelectedDate = Convert.ToDateTime(minDate.FirstOrDefault());

// SECTION 5: Binding the control with the dataSource
 sessionCartScheduler.DataBind();
}

protected void sessionCartScheduler_AppointmentClick(object sender, SchedulerEventArgs e)
 {
 int sessionIDvalue = (from sa in ndx.SessionAttendees
 where sa.SessionAttendeeUID == Convert.ToInt16(e.Appointment.ID)
 select sa.SessionID).FirstOrDefault();
 string sessionURL = "~/session/" + sessionIDvalue.ToString();
 Response.Redirect(sessionURL);
 }

protected void sessionCartScheduler_AppointmentDelete(object sender, AppointmentDeleteEventArgs e)
{
 //SECTION 1: Extracting the complete row of the selected tab and deleting it
 int uid = Convert.ToInt32(e.Appointment.ID);
 SessionAttendee sa = (from s in ndx.SessionAttendees
 where s.SessionAttendeeUID == uid
 select s).First() as SessionAttendee;
 ndx.Delete(sa);
 ndx.SaveChanges();

//SECTION 2: Refreshing the control
 var sessiontime = from st in ndx.SessionAttendees
 join ss in ndx.Sessions on st.SessionID equals ss.SessionID
 join sts in ndx.SessionTimeSlots on ss.TimeSlotID equals sts.TimeSlotID
 where st.UserID == Convert.ToInt32(userID.Value)
 orderby sts.FromTime
 select new
 {
 FromTime = sts.FromTime,
 Duration = sts.Durationinmins,
 EndTime = sts.FromTime.AddMinutes(Convert.ToDouble(sts.Durationinmins)),
 Title = ss.Title,
 SessionAttendeeUID = st.SessionAttendeeUID,
 SessionID = st.SessionID,
 UserID = st.UserID
 };

 sessionCartScheduler.DataSource = sessiontime.ToList();
 sessionCartScheduler.DataBind();

 e.Cancel = true;
}

SECTION 1: To delete the item from the table we first need to extract that row from the context. Once we have extracted the row we can easily remove the data using the CRUD Operations of OpenAccess ORM.

“e.Appointment.ID” is used to abstract the DataKeyField of the RadScheduler.

SECTION 2: Once the data is removed we need to rebind the data. To rebind the data, we need to refresh the data source. Hence, we create a data source and bind the control.