Sending Base64 Image Data As Attachment With Mail Using ASP.NET MVC

In this post we will discuss about how to send base64 image data as attachment on email using asp.net mvc c#.

MailController.cs :-

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Net.Mail;

using System.Net.Mime;

using System.Text;

using System.Web;

using System.Web.Mvc;

namespace SendMail.Controllers

{

    public class MailController : Controller

    {

        public ActionResult Index()

        {

            return View();

        }

        public ActionResult SendMailWithAttachment()

        {

            string to_email = "receiver@gmail.com";

            var from_email = "sender@gmail.com";

            var subject = "Testing email sending functionality";

            var body = "This is a body of testing email functionality";

            MailMessage message = new MailMessage();

            SmtpClient smtp = new SmtpClient();

            message.From = new MailAddress(from_email);

            message.To.Add(new MailAddress(to_email));

            message.Subject = subject;

            message.IsBodyHtml = true; //to make message body as html  

            message.Body = body;

            string FixBase64ForImage(string Image)

            {

                StringBuilder sbText = new StringBuilder(Image, Image.Length);

                sbText.Replace("\r\n", string.Empty); sbText.Replace(" ", string.Empty);

                return sbText.ToString();

            };

            var bas64Img = "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";

            Byte[] bitmapData = Convert.FromBase64String(FixBase64ForImage(bas64Img));

            System.IO.MemoryStream ms = new System.IO.MemoryStream(bitmapData);

            ms.Position = 0;

            ContentType ct = new ContentType(MediaTypeNames.Image.Jpeg);

            Attachment attach = new Attachment(ms, ct);

            attach.ContentDisposition.FileName = "myFile.Jpeg";

            message.Attachments.Add(attach);

            

            smtp.Port = 587;

            smtp.Host = "smtp.gmail.com";

            smtp.EnableSsl = true;

            smtp.UseDefaultCredentials = false;

            smtp.Credentials = new NetworkCredential("sender@gmail.com", "senderPassword");

            smtp.DeliveryMethod = SmtpDeliveryMethod.Network;

            ServicePointManager.ServerCertificateValidationCallback += (o, c, ch, er) => true;

            smtp.Send(message);

            ms.Close();

            ViewBag.mail_status = "Mail Sent";

            return View("Index");

        }

    }

}

Note: Enable "Less Secure Apps" for the email-id from which you want to send the mail. follow below link- https://www.google.com/settings/security/lesssecureapps