Get message changes (get message delta)

Retrieve a list of messages that have been added, deleted, or updated in a specified folder.

C# example

using System;
using System.Threading.Tasks;
using Independentsoft.Graph;
using Independentsoft.Graph.Users;
using Independentsoft.Graph.Mails;

namespace ConsoleApp1
{
    class Program
    {
        static async Task Main()
        {
            try
            {
                GraphClient client = new GraphClient();

                client.ClientId = "63333333-209e-454e-b7bd-55a4d201270f";
                client.Tenant = "independentsoft.onmicrosoft.com";
                client.ClientSecret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";

                //initial request
                MessageChanges changes = await client.GetMessageChanges(StandardMailboxFolder.Inbox, new UserId("info@independentsoft.onmicrosoft.com"));

                while (true)
                {
                    while (true)
                    {
                        foreach (Message message in changes.Messages)
                        {
                            Console.WriteLine("Id: " + message.Id);
                            Console.WriteLine("Subject: " + message.Subject);
                            Console.WriteLine("ReceivedTime: " + message.ReceivedTime);
                            Console.WriteLine("----------------------------------------" );
                        }

                        if(changes.NextLink != null)
                        {
                            //next page
                            changes = await client.GetMessageChanges(changes.NextLink);
                        }
                        else
                        {
                            break;
                        }
                    }

                    System.Threading.Thread.Sleep(60000); //1 min pause

                    //get changes since last request
                    changes = await client.GetMessageChanges(changes.DeltaLink);
                }
            }
            catch (GraphException ex)
            {
                Console.WriteLine("Error: " + ex.Code);
                Console.WriteLine("Message: " + ex.Message);
                Console.Read();
            }
        }
    }
}

VB example

Imports Independentsoft.Graph
Imports Independentsoft.Graph.Users
Imports Independentsoft.Graph.Mails

Namespace Sample
    Class Module1

        Shared Sub Main(ByVal args As String())

            Dim task = New Task(AddressOf Run)

            ' Start and wait for task to end.
            task.Start()
            Console.Read()

        End Sub

        Shared Async Sub Run()
            Try

                Dim client As GraphClient = New GraphClient()

                client.ClientId = "63333333-209e-454e-b7bd-55a4d201270f"
                client.Tenant = "independentsoft.onmicrosoft.com"
                client.ClientSecret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

                Dim changes As MessageChanges = Await client.GetMessageChanges(StandardMailboxFolder.Inbox, New UserId("info@independentsoft.onmicrosoft.com"))

                While True

                    While True

                        For Each message In changes.Messages
                            Console.WriteLine("Id: " + message.Id)
                            Console.WriteLine("Subject: " + message.Subject)
                            Console.WriteLine("ReceivedTime: " + message.ReceivedTime)
                            Console.WriteLine("----------------------------------------")
                        Next

                        If Not changes.NextLink Is Nothing Then
                            ''next page
                            changes = Await client.GetMessageChanges(changes.NextLink)
                        Else
                            Exit While

                        End If
                    End While


                    System.Threading.Thread.Sleep(60000) ''1 min pause

                    'get changes since last request
                    changes = Await client.GetMessageChanges(changes.DeltaLink)

                End While


            Catch ex As GraphException
                Console.WriteLine("Error: " + ex.Code)
                Console.WriteLine("Error: " + ex.Message)
                Console.Read()
            End Try
        End Sub

    End Class
End Namespace

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Graph .NET > Tutorial > Get message changes (get message delta)

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