Find task request

The following example shows you how to find task request messages, accept task and create task in the Tasks folder. Unfortunately with Exchange Web Services is not possible to send task request or task accept/decline response.

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
            {
                IsEqualTo restriction = new IsEqualTo(TaskPropertyPath.ItemClass, ItemClass.TaskRequest);

                FindItemResponse response = service.FindItem(StandardFolder.Inbox, TaskPropertyPath.AllPropertyPaths, restriction);

                for (int i = 0; i < response.Items.Count; i++)
                {
                    if (response.Items[i] is Task)
                    {
                        ItemId taskRequestId = response.Items[i].ItemId;

                        Item item = service.GetItem(taskRequestId);
                        
                        ItemAttachment itemAttachment = (ItemAttachment)service.GetAttachment(item.Attachments[0].Id);
                        
                        Task task = (Task)itemAttachment.Item;

                        Console.WriteLine("Subject = " + task.Subject);
                        Console.WriteLine("StartDate = " + task.CommonStartDate);
                        Console.WriteLine("DueDate = " + task.DueDate);
                        Console.WriteLine("Owner = " + task.Owner);
                        Console.WriteLine("Body Preview = " + task.BodyPlainText);
                        Console.WriteLine("----------------------------------------------------------------");

                        //Accept task and create new task in the Tasks folder
                        ItemId taskId = service.CreateItem(task, StandardFolder.Tasks);

                        //Delete TaskRequest from the Inbox
                        service.DeleteItem(taskRequestId);
                    }
                }

                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 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 New IsEqualTo(TaskPropertyPath.ItemClass, ItemClass.TaskRequest)

                Dim response As FindItemResponse = service.FindItem(StandardFolder.Inbox, TaskPropertyPath.AllPropertyPaths, restriction)

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

                    If TypeOf response.Items(i) Is Task Then

                        Dim taskRequestId As ItemId = response.Items(i).ItemId

                        Dim item As Item = service.GetItem(taskRequestId)

                        Dim itemAttachment As ItemAttachment = DirectCast(service.GetAttachment(item.Attachments(0).Id), ItemAttachment)

                        Dim task As Task = DirectCast(itemAttachment.Item, Task)

                        Console.WriteLine("Subject = " + task.Subject)
                        Console.WriteLine("StartDate = " + task.CommonStartDate)
                        Console.WriteLine("DueDate = " + task.DueDate)
                        Console.WriteLine("Owner = " + task.Owner)
                        Console.WriteLine("Body Preview = " + task.BodyPlainText)
                        Console.WriteLine("----------------------------------------------------------------")

                        'Accept task and create new task in the Tasks folder 
                        Dim taskId As ItemId = service.CreateItem(task, StandardFolder.Tasks)

                        'Delete TaskRequest from the Inbox 
                        service.DeleteItem(taskRequestId)
                    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

Independentsoft - any library, any programming language

Exchange Web Services .NET > Tutorial > Find task request

Need help? Ask our developers: