Find master reccurring appointments

The following example shows you how to find all master reccurring appointments and based on master recurring appointment get all single occurences.

C# example

using System;
using System.Net;
using Independentsoft.Exchange;

namespace Sample
{
    class Program
    {
        static void Main(string[] args)
        {
            NetworkCredential credential = new NetworkCredential("username", "password");
            Service service = new Service("https://myserver/ews/Exchange.asmx", credential);

            try
            {
                Exists restriction = new Exists(AppointmentPropertyPath.RecurrenceStart);

                FindItemResponse response = service.FindItem(StandardFolder.Calendar, AppointmentPropertyPath.AllPropertyPaths, restriction);

                for (int i = 0; i < response.Items.Count; i++)
                {
                    if (response.Items[i] is Appointment)
                    {
                        Appointment master = (Appointment)response.Items[i];
                    
                        OccurrenceItemId occurrenceId = new OccurrenceItemId(master.ItemId.Id, master.ItemId.ChangeKey);
                    
                        //Get all occurences until exception occurs.
                        for(int j=1; j < 999; j++)
                        {
                            occurrenceId.Index = j;
                          
                            try
                            {
                                Appointment occurrence = service.GetAppointment(occurrenceId);
                           
                                Console.WriteLine("Subject = " + occurrence.Subject);
                                Console.WriteLine("StartTime = " + occurrence.StartTime);
                                Console.WriteLine("EndTime = " + occurrence.EndTime); 
                                Console.WriteLine("----------------------------------------------------------------");
                            }
                            catch (ServiceRequestException ex)
                            {
                                //ignore exception "Occurrence index is out of recurrence range"
                                break;
                            }
                        }                   
                    }
                }

                Console.Read();
            }
            catch (ServiceRequestException ex)
            {
                Console.WriteLine("Error: " + ex.Message);
                Console.WriteLine("Error: " + ex.XmlMessage);
                Console.Read();
            }
            catch (WebException ex)
            {
                Console.WriteLine("Error: " + ex.Message);
                Console.Read();
            }
        }
    }
}

VB example

Imports System
Imports System.Net
Imports System.Collections.Generic
Imports Independentsoft.Exchange

Namespace Sample
    Class Module1
        Shared Sub Main(ByVal args As String())

            Dim credential As New NetworkCredential("username", "password")
            Dim service As New Service("https://myserver/ews/Exchange.asmx", credential)

            Try
                Dim restriction As Exists = New Exists(AppointmentPropertyPath.RecurrenceStart)

                Dim response As FindItemResponse = service.FindItem(StandardFolder.Calendar, AppointmentPropertyPath.AllPropertyPaths, restriction)

                For i As Integer = 0 To response.Items.Count - 1

                    If TypeOf response.Items(i) Is Appointment Then

                        Dim master As Appointment = DirectCast(response.Items(i), Appointment)

                        Dim occurrenceId As OccurrenceItemId = New OccurrenceItemId(master.ItemId.Id, master.ItemId.ChangeKey)

                        ''Get all occurences until exception occurs.
                        For j As Integer = 1 To 999
                            occurrenceId.Index = j

                            Try
                                Dim occurrence As Appointment = service.GetAppointment(occurrenceId)

                                Console.WriteLine("Subject = " & occurrence.Subject)
                                Console.WriteLine("StartTime = " & occurrence.StartTime)
                                Console.WriteLine("EndTime = " & occurrence.EndTime)
                                Console.WriteLine("----------------------------------------------------------------")
                            Catch ex As ServiceRequestException
                                ''ignore exception "Occurrence index is out of recurrence range"
                                Exit For
                            End Try
                        Next
                    End If
                Next

                Console.Read()

            Catch ex As ServiceRequestException
                Console.WriteLine("Error: " & ex.Message)
                Console.WriteLine("Error: " & ex.XmlMessage)
                Console.Read()
            Catch ex As WebException
                Console.WriteLine("Error: " & ex.Message)
                Console.Read()
            End Try

        End Sub
    End Class
End Namespace

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Exchange Web Services .NET > Tutorial > Find master reccurring appointments

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