How to embed an Image Stream to MailMessage

Question

I\'m having some difficulty embedding an image from the Properties.Resources to a MailMessage, currently the image does not show in the email i receive.

I have succe

Answer 1

You can embed the image and skip working with resources by converting it to base64 instead:

public static string BitmapToBase64(Bitmap b)
{
   ImageConverter ic = new ImageConverter();
   byte[] ba = (byte[])ic.ConvertTo(b, typeof(byte[]));
   return Convert.ToBase64String(ba, 0, ba.Length);
}

and use it as html image src :

string logoimage="<img src='data:image/png;base64," + BitmapToBase64(logo) + "'>";

Note that converting to Base64 slighly increases the size of the image.

Answer 2

Ok i have solved the problem.

Instead of using the BitMap save method I converted the BitMap to Byte[] and gave the memory stream the Byte[]

Did not work :

 b.Save(logo, ImageFormat.Jpeg);

Did Work:

Bitmap b = new Bitmap(Properties.Resources.companyLogo);
ImageConverter ic = new ImageConverter();
Byte [] ba = (Byte[]) ic.ConvertTo(b,typeof(Byte[]));
MemoryStream logo = new MemoryStream(ba);

I think it has something to do with the Bitmap.Save method, in the MSDN lib it mentioned that the stream has to have an offset of 0.

Answer 3

Try look here:

http://www.eggheadcafe.com/community/aspnet/2/10219822/send-mail-with-atttached-image.aspx

From the link above:

static void EmbedImages()
{
   var mail = new MailMessage();

   mail.From = new MailAddress("me@mycompany.com");
   mail.To.Add("you@yourcompany.com");
   mail.Subject = "This is an email";

   var plainView = AlternateView.CreateAlternateViewFromString(
      "This is my plain text content, viewable by those clients that don't support html",
      null, "text/plain");

   var htmlView = AlternateView.CreateAlternateViewFromString(
      "Here is an embedded image.<img src=cid:companylogo>", 
      null, "text/html");

   LinkedResource logo = new LinkedResource( "c:\\temp\\logo.gif" );
   logo.ContentId = "companylogo";

   htmlView.LinkedResources.Add(logo);

   mail.AlternateViews.Add(plainView);
   mail.AlternateViews.Add(htmlView);

   var smtp = new SmtpClient("127.0.0.1"); //specify the mail server address
   smtp.Send(mail);
}

Answer 4

Instead of adding the "logo" to Resources, I added it directly to the project and set it to build as an "Embedded Resource".

Then using System.Reflection.Assymbly I can get it (I assume directly) as a Stream:

  var _assembly = Assembly.GetExecutingAssembly();
  var _logoStream = _assembly.GetManifestResourceStream("[Project].[Filename].png");
  var logo = new LinkedResource(_logoStream, "image/png");
  logo.ContentId = "Logo";
  html.LinkedResources.Add(logo);

Answer 5

Bitmap b = new Bitmap(Properties.Resources.companyLogo);
MemoryStream logo = new MemoryStream();
b.Save(logo, ImageFormat.Jpeg);

After you do the save, you have to "seek" the MemoryStream back to the start.

logo.Position = 0;