Multiple appointments through RadScheduler control - Exporting ICS File

[John]

Hi 

I'm working on "Add to Calendar" feature from my Sharepoint webpart (created using VS2010). If I want to include  multiple breakdown appointments  (For Ex, one for today between 9.00 a.m - 11 a.m & one for tomorrow between 3.00 p.m - 5.00 p.m), How do I do that?
The following code works for a single appointment. Its creating an additional calendar  if I have more that one appointment. 
Instead I should be able to update my existing calendar with the multiple appointments.

Could you please assist me how to do this?

Here is part of my code 

                //........
                EventSessions = from eventobj1 in context.EventSessions
   where eventobj1.Event.Id == eventid


   select eventobj1;

      foreach (EventSessionsItem session in EventSessions)

      {

         Appointment _appointment = new Appointment();

 

         editor.Content = session.Event.EventDetails;

         _appointment.Subject = session.Title;

         _appointment.Description = Server.HtmlDecode(editor.Text);

         _appointment.Start = session.DateOfSession.Value; 

         _appointment.End = dtStart.AddHours(session.SessionDuration.Value); 

                     sbICSFile.Append(RadScheduler.ExportToICalendar(_appointment));

      }

      WriteCalendar(sbICSFile.ToString());

       



private void WriteCalendar(String data)
{
HttpResponse response = Page.Response;
response.Clear();
response.Buffer = true;
response.ContentType = "text/calendar";
response.ContentEncoding = Encoding.UTF8;
response.Charset = "utf-8";
response.AddHeader("Content-Disposition", "attachment;filename=\"Calendar.ics\"");
response.Write(data);
response.End();
}

[Cat Cheshire]

How exactly you populate the scheduler with data?
Why are you overriding the response?