Send Email with Attachment in C# from Windows Store Apps - XAML - UWP

In previous section, I introduced how to send HTML email. In this section, I will introduce how to add attachment to email in C#.


To send an email with file attachment, we need to use AddAttachmentAsync method. This method can attach a file to the email message from local disk or a remote URL.


Remarks: All of samples in this section are based on first section: Send email in A simple C# XAML Windows Store App project. To compile and run the following example codes successfully, please click here to learn how to create the test project and add reference of EASendMail to your project.

[C# - Add attachment from local disk or remote URL]

The following example codes demonstrate how to use EASendMail SMTP component to send email with file attachments.


To get the full sample projects, please refer to Samples section.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// Add EASendMail and Tasks Namespace
using System.Threading.Tasks;
using EASendMail;

namespace CSharp_Windows_Store_App
    public sealed partial class MainPage : Page
        public MainPage()

        protected override void OnNavigatedTo(NavigationEventArgs e)

        private async void btnSend_Click(object sender, RoutedEventArgs e)
            btnSend.IsEnabled = false;
            await Send_Email();
            btnSend.IsEnabled = true;

        private async Task Send_Email()
            String Result = "";
                SmtpMail oMail = new SmtpMail("TryIt");
                SmtpClient oSmtp = new SmtpClient();

                // Set sender email address, please change it to yours
                oMail.From = new MailAddress("");

                // Add recipient email address, please change it to yours
                oMail.To.Add(new MailAddress(""));

                // Set email subject
                oMail.Subject = "test email from C# XAML project with file attachment";

                // Set Html body
                oMail.HtmlBody = "<font size=5>This is</font> <font color=red><b>a test</b></font>";

                // get a file path from PicturesLibrary,
                // to access files in PicturesLibrary, you MUST have "Pictures Library" checked in
                // your project -> Package.appxmanifest -> Capabilities
                Windows.Storage.StorageFile file =
                    await Windows.Storage.KnownFolders.PicturesLibrary.GetFileAsync("test.jpg");

                string attfile = file.Path;
                Attachment oAttachment = await oMail.AddAttachmentAsync(attfile);

                // if you want to add attachment from remote URL instead of local file.
                // string attfile = "";
                // Attachment oAttachment = await oMail.AddAttachmentAsync(attfile);

                // you can change the Attachment name by
                // oAttachment.Name = "mytest.jpg";

                // Your SMTP server address
                SmtpServer oServer = new SmtpServer("");

                // User and password for ESMTP authentication
                oServer.User = "";
                oServer.Password = "testpassword";

                // If your SMTP server requires TLS connection on 25 port, please add this line
                // oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;

                // If your SMTP server requires SSL connection on 465 port, please add this line
                // oServer.Port = 465;
                // oServer.ConnectType = SmtpConnectType.ConnectSSLAuto;

                await oSmtp.SendMailAsync(oServer, oMail);
                Result = "Email was sent successfully!";
            catch (Exception ep)
                Result = String.Format("Failed to send email with the following error: {0}", ep.Message);

            // Display Result by Diaglog box
            Windows.UI.Popups.MessageDialog dlg = new

            await dlg.ShowAsync();

Next Section

At next section I will introduce how to add embedded images/pictures to email message.



If you have any comments or questions about above example codes, please click here to add your comments.