Find unread messages

The following example shows you how to find unread messages and how to mark messages as read(update IsRead property). During update (method UpdateMessage) you can specify which properties you want to update. All other Update* methods have the same functionality.

C# example

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Independentsoft.Graph;
using Independentsoft.Graph.Mails;
using Independentsoft.Graph.Users;
using Independentsoft.Graph.QueryOptions;

namespace Sample
{
    class Program
    {
        static async Task Main(string[] args)
        {
            try
            {
                GraphClient client = new GraphClient();

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

                Query query = new Query();
                query.Top = 999;
                query.Filter = new IsEqualTo(MessagePropertyName.IsRead, false);

                IList<Message> unreadMessages = await client.GetMessages(StandardMailboxFolder.Inbox, new UserId("info@independentsoft.onmicrosoft.com"), query);

                for(int i=0; i < unreadMessages.Count; i++)
                {
                    Console.WriteLine("Id = " + unreadMessages[i].Id);
                    Console.WriteLine("Subject = " + unreadMessages[i].Subject);
                    Console.WriteLine("IsRead = " + unreadMessages[i].IsRead);

                    //Mark message as read
                    unreadMessages[i].IsRead = true;

                    //update only IsRead property
                    Message updatedMessage = await client.UpdateMessage(unreadMessages[i], new List<String>() { MessagePropertyName.IsRead }, new UserId("info@independentsoft.onmicrosoft.com"));

                    Console.WriteLine("After update (marked as read) ---------------");
                    Console.WriteLine("Id = " + updatedMessage.Id);
                    Console.WriteLine("Subject = " + updatedMessage.Subject);
                    Console.WriteLine("IsRead = " + updatedMessage.IsRead);
                    Console.WriteLine("--------------------------------------------");
                }

                Console.Read();
            }
            catch (GraphException ex)
            {
                Console.WriteLine("Error: " + ex.Code);
                Console.WriteLine("Message: " + ex.Message);
                Console.Read();
            }
        }
    }
}

VB example

Imports System.IO
Imports Independentsoft.Graph
Imports Independentsoft.Graph.Users
Imports Independentsoft.Graph.Mails
Imports Independentsoft.Graph.QueryOptions

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 query As Query = New Query()
                query.Top = 999
                query.Filter = New IsEqualTo(MessagePropertyName.IsRead, False)

                Dim unreadMessages As IList(Of Message) = Await client.GetMessages(StandardMailboxFolder.Inbox, new UserId("info@independentsoft.onmicrosoft.com"), query);

                For i As Integer = 0 To unreadMessages.Count - 1
                    Console.WriteLine("Id = " & unreadMessages(i).Id)
                    Console.WriteLine("Subject = " & unreadMessages(i).Subject)
                    Console.WriteLine("IsRead = " & unreadMessages(i).IsRead)
                    unreadMessages(i).IsRead = True

                    Dim updatedMessage As Message = Await client.UpdateMessage(unreadMessages(i), New List(Of String)() From {MessagePropertyName.IsRead}, new UserId("info@independentsoft.onmicrosoft.com"))

                    Console.WriteLine("After update (marked as read) ---------------")
                    Console.WriteLine("Id = " & updatedMessage.Id)
                    Console.WriteLine("Subject = " & updatedMessage.Subject)
                    Console.WriteLine("IsRead = " & updatedMessage.IsRead)
                    Console.WriteLine("--------------------------------------------")
                Next

            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 > Find unread messages

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