I have written some articles on sending email from .net application. In this article I will show you a tricky way of sending embeded image to your mail.
The trick to embed image is to create an alternative view and to add a linked resource to the alternative view. Alternative views enable you to create different versions of the email message -- typically one in plain text and the other formatted with HTML. These then substitute for the basic msg.Body property.
To do the actual embedding, you need to do a number of things:
Here is example code sample:
The trick to embed image is to create an alternative view and to add a linked resource to the alternative view. Alternative views enable you to create different versions of the email message -- typically one in plain text and the other formatted with HTML. These then substitute for the basic msg.Body property.
To do the actual embedding, you need to do a number of things:
- Create an HTML-formatted message.
- Use an <img> tag in the message body.
- For the src attribute of the <img>, point to a content ID (cid). This points to the portion of the message containing the image stream.
- Create an alternative view.
- Create a linkedResource that slurps up the image you want to embed.
- Assign a content ID to the linked resource -- this should match the cid you used in the <img> tag.
- Assign the image's file name to the linked resource.
Here is example code sample:
protected void btnSend_Click(object sender, EventArgs e) { MailMessage mail = BuildMail(); SendEMail(mail); }
private MailMessage BuildMail() { string from, to, bcc, cc, subject, body; from = "uniquesaiful@gmail.com"; //Email Address of Sender to = "tips.asp.net@gmail.com,saifulondotnet@gmail.com,uniquesaiful@gmail.com"; //Email Address of Receiver bcc = ""; cc = ""; subject = "This is a test email. I am just checking whether email client is working properly."; string imagePath = Server.MapPath("~") + "\\"; string fileName = imagePath + "Logo.JPG"; StringBuilder sb = new StringBuilder(); sb.Append("Hi Scott,<br/>"); sb.Append("This is a test email. We are testing out email client. Please don't mind.<br/>"); sb.Append("We are sorry for this unexpected mail to your mail box.<br/>"); sb.Append("<br/>"); sb.Append("Thanking you<br/>"); sb.Append("Tips.Asp.Net"); body = sb.ToString(); AlternateView av = AlternateView.CreateAlternateViewFromString(body, null, MediaTypeNames.Text.Html); LinkedResource linkedRes = new LinkedResource(fileName); linkedRes.ContentId = "image1"; linkedRes.ContentType.Name = fileName; av.LinkedResources.Add(linkedRes); MailMessage mail = new MailMessage(); mail.From = new MailAddress(from); if (to.Contains(",")) { string[] tos = to.Split(','); for (int i = 0; i < tos.Length; i++) { mail.To.Add(new MailAddress(tos[i])); } } else { mail.To.Add(new MailAddress(to)); } if (!string.IsNullOrEmpty(bcc)) { mail.Bcc.Add(new MailAddress(bcc)); } if (!string.IsNullOrEmpty(cc)) { mail.CC.Add(new MailAddress(cc)); } mail.Subject = subject; mail.Body = body; mail.AlternateViews.Add(av); mail.IsBodyHtml = true; return mail; } private void SendEMail(MailMessage mail) { SmtpClient client = new SmtpClient(); client.Host = "smtp.gmail.com"; client.Port = 587; client.EnableSsl = true; client.Credentials = new System.Net.NetworkCredential("uniquesaiful", ami@janina.com); try { client.Send(mail); } catch (Exception ex) { throw ex; } }
