Reading Email and Attachment From Microsoft Exchange Server

The Email Message Details are shown in the ListView.

EmailMessage message = EmailMessage.Bind(exchange, new ItemId(msgid));

if (message.HasAttachments && message.Attachments[0] is FileAttachment)
{
    FileAttachment fileAttachment = message.Attachments[0] as FileAttachment;
    fileAttachment.Load(
        @"C:\Users\Admin\Documents\Visual Studio 2012\Projects\ReadMailFromExchangeServer\ReadMailFromExchangeServer\Attachments\" + fileAttachment.Name
    );
    lblAttach.Text = "Attachment Downloaded: " + fileAttachment.Name;
}
else
{
    MessageBox.Show("No Attachments found!!");
}

Read the EmailMessage using message id.

If the message has an attachment, create the FileAttachment object and then download it.

Here's the complete code.

using Microsoft.Exchange.WebServices.Data;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ReadMailFromExchangeServer
{
    public partial class Form1 : Form
    {
        ExchangeService exchange = null;

        public Form1()
        {
            InitializeComponent();
            lstMsg.Clear();
            lstMsg.View = View.Details;
            lstMsg.Columns.Add("Date", 150);
            lstMsg.Columns.Add("From", 250);
            lstMsg.Columns.Add("Subject", 400);
            lstMsg.Columns.Add("Has Attachment", 50);
            lstMsg.Columns.Add("Id", 100);
            lstMsg.FullRowSelect = true;
        }

        private void btnRead_Click(object sender, EventArgs e)
        {
            ConnectToExchangeServer();
            TimeSpan ts = new TimeSpan(0, -1, 0, 0);
            DateTime date = DateTime.Now.Add(ts);
            SearchFilter.IsGreaterThanOrEqualTo filter = new SearchFilter.IsGreaterThanOrEqualTo(ItemSchema.DateTimeReceived, date);

            if (exchange != null)
            {
                FindItemsResults<Item> findResults = exchange.FindItems(WellKnownFolderName.Inbox, filter, new ItemView(50));

                foreach (Item item in findResults)
                {
                    EmailMessage message = EmailMessage.Bind(exchange, item.Id);
                    ListViewItem listitem = new ListViewItem(new[]
                    {
                        message.DateTimeReceived.ToString(),
                        message.From.Name.ToString() + " (" + message.From.Address.ToString() + ")",
                        message.Subject,
                        (message.HasAttachments ? "Yes" : "No"),
                        message.Id.ToString()
                    });
                    lstMsg.Items.Add(listitem);
                }

                if (findResults.Items.Count <= 0)
                {
                    lstMsg.Items.Add("No Messages found!!");
                }
            }
        }

        public void ConnectToExchangeServer()
        {
            lblMsg.Text = "Connecting to Exchange Server..";
            lblMsg.Refresh();
            try
            {
                exchange = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
                exchange.Credentials = new WebCredentials("USERNAME", "PASSWORD", "DOMAIN");
                exchange.AutodiscoverUrl("USERNAME@DOMAIN");

                lblMsg.Text = "Connected to Exchange Server: " + exchange.Url.Host;
                lblMsg.Refresh();
            }
            catch (Exception ex)
            {
                lblMsg.Text = "Error Connecting to Exchange Server!! " + ex.Message;
                lblMsg.Refresh();
            }
        }

        private void btnLoad_Click(object sender, EventArgs e)
        {
            if (exchange != null)
            {
                if (lstMsg.Items.Count > 0)
                {
                    ListViewItem item = lstMsg.SelectedItems[0];

                    if (item != null)
                    {
                        string msgid = item.SubItems[4].Text.ToString();
                        EmailMessage message = EmailMessage.Bind(exchange, new ItemId(msgid));
                        
                        if (message.HasAttachments && message.Attachments[0] is FileAttachment)
                        {
                            FileAttachment fileAttachment = message.Attachments[0] as FileAttachment;
                            // Change the below Path
                            fileAttachment.Load(
                                @"C:\Users\Admin\Documents\Visual Studio 2012\Projects\ReadMailFromExchangeServer\ReadMailFromExchangeServer\Attachments\" + fileAttachment.Name
                            );
                            lblAttach.Text = "Attachment Downloaded: " + fileAttachment.Name;
                        }
                        else
                        {
                            MessageBox.Show("No Attachments found!!");
                        }
                    }
                    else
                    {
                        MessageBox.Show("Please select a Message!!");
                    }
                }
                else
                {
                    MessageBox.Show("Messages not loaded!!");
                }
            }
            else
            {
                MessageBox.Show("Not Connected to Mail Server!!");
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
        }
    }
}

1. Import the Microsoft Exchange Services.

   using Microsoft.Exchange.WebServices.Data;
   

2. Create the instance and pass the credentials.
3. Read the emails.
4. Read the attachment.