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Embed image in Email - ASP.NET , C#

, 13 Dec 2007 CPOL
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Code to embed logo and other images while sending email


This is a simple article which tells you how you can embed images in emails. This can be very useful when you want to send emails from your website.A common scenario would be when a new user registers with your site and you want to send a welcome email with your site's logo on top.

I searched the net when I faced this issue. I am grateful to many authors from where I could make a start. I have used their code while writing this. Due credit goes to them all. The intention is to make the code available for the others too. To use this all you have to so is copy the code and paste it in any button click event.

This may only work with ASP.NET 2.0 & C#. I have tested it too. It will not run in ASP.NET 1.1.

Namespaces Used

using System.Net.Mail;
using System.Net.Mime;


 // send mail to the new user who has registered.
   protected void yourButton_Click(object sender, EventArgs e)
            string strMailContent = "Welcome new user";
            string fromAddress = "";
            string toAddress = "";
            string contentId  = "image1";
            string path = Server.MapPath(@"images/Logo.jpg"); // my logo is placed in images folder
            MailMessage mailMessage = new MailMessage( fromAddress, toAddress );
            mailMessage.Bcc.Add(""); // put your id here
            mailMessage.Subject = "Welcome new User";

            LinkedResource logo = new LinkedResource(path);
            logo.ContentId = "companylogo";
            // done HTML formatting in the next line to display my logo
            AlternateView av1 = AlternateView.CreateAlternateViewFromString("<html><body><img src=cid:companylogo/><br></body></html>" + strMailContent, null, MediaTypeNames.Text.Html);

            mailMessage.IsBodyHtml = true;
            SmtpClient mailSender = new SmtpClient("localhost"); //use this if you are in the development server

Note: SmtpClient mailSender = new SmtpClient(ConfigurationManager.AppSettings["MyCustomId"]); // use this in the Production Server. I have specified my email server in the web.config file


The image may not be displayed in Outlook Express. It worked well when the mail was viewed in Yahoo. If your site is not a trusted one there is a chance that the image may be blocked. It did not work with Hotmail and Gmail.

There are other ways to show images, but like many authors have pointed out they do not embed the image. They always refer to the parent site. The image won't be displayed when offline or when the location of the image has changed in the parent site

Do please send your comments . I would be happy to hear from you.

Thank you , Happy Coding !


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Rajesh C Medackel
Web Developer
India India
A Mechanical Engineer, MBA working in Microsoft Technologies. Currently employed with a software major in Mumbai,India

Comments and Discussions

GeneralThanks PinmemberMember 1024437210-Feb-15 23:22 
QuestionI have been able to embed images in Gmail Pinmemberelectriac3-Jan-13 10:33 
Questionhtml templates in PingroupHari Chowdary8-May-12 22:38 
QuestionPicture not adding to the body of the mail PinmemberHayden Pinto9-Mar-12 6:51 
GeneralMy vote of 2 PingroupRajesh Duraisamy17-Aug-11 5:38 
GeneralChanges for it to work on Gmail and Thunderbird PinmemberMember 786410722-Apr-11 2:32 
GeneralMy vote of 1 PinmemberRam Shah23-Sep-10 0:50 
QuestionHow to display images in Windows Live Mail [modified] PinmemberMorcoveata23-Aug-10 3:12 
AnswerRe: How to display images in Windows Live Mail PinmemberrurouniRonin3-May-11 10:12 
Generalthanks ! Pinmemberaicha20089-Sep-09 1:56 
Questionhow to send mail within intranet. Pinmembersudhir behera8-Sep-09 19:00 
GeneralI had trouble getting this to work in Visual Studio 2008 Pinmembermbizzile6-Feb-09 11:56 
Generaldo not work with outlook 2007 Pinmembermrodrig@renacimiento.com24-Jul-08 2:06 
GeneralRe: do not work with outlook 2007 PinmemberKenL_MCSE31-Oct-08 8:24 
GeneralRe: do not work with outlook 2007 PinmemberMember 435949310-Dec-08 21:17 
GeneralRe: do not work with outlook 2007 PinmemberMaciusA28-Apr-10 23:17 
GeneralAdd Button in Email Pinmemberdtkubal4-Mar-08 2:54 
GeneralRe: Add Button in Email PinmemberRajesh C Medackel12-Mar-08 3:03 
GeneralVery good article Pinmembera-tibi27-Nov-07 3:44 
QuestionAdding Text after Image PinmemberSheila K26-Jul-07 10:08 
Questionimage going as attachement PinmemberDilipV26-Jun-07 7:40 
AnswerRe: image going as attachement PinmemberDilipV26-Jun-07 8:06 
Questionhow to send mail using outlook express 9.0 ( 2.0)? PinmemberJesu.Official14-Feb-07 18:08 
GeneralPost Code Pinmemberlaokimsea5-Jan-07 20:24 
GeneralRe: Post Code PinmemberRajesh C Medackel29-Jan-07 4:01 

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