Sending HTML attachment with images

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5.00/5 (1 vote)

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C#

how to send email which contain HTML attachment with images?

Posted 1-Mar-12 20:45pm

softprga

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Sergey Alexandrovich Kryukov 2-Mar-12 3:20am

This is something good to know, and it was not absolutely easy to find out, so I voted 5 for the question.
--SA

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walterhevedeich · Answer 1 · 2012-03-01T20:52:00

Solution 1

Check these links.

http://blog.devexperience.net/en/12/Send_an_Email_in_CSharp_with_Inline_attachments.aspx[^]
http://csharp.net-informations.com/communications/csharp-email-attachment.htm[^]
http://www.systemnetmail.com/faq/4.4.aspx[^]

Or try Google[^]

Posted 1-Mar-12 20:52pm

walterhevedeich

Comments

Sergey Alexandrovich Kryukov 2-Mar-12 3:22am

What's funny, the first sample is exactly the same as the one in my answer, but from different source. My 5.
But I also explained the background, please see.
--SA

softprga 2-Mar-12 5:19am

Image is inside html document.
and send that html.when html doc open ,image will display in html page.

Sergey Alexandrovich Kryukov · Answer 2 · 2012-03-01T21:17:00

Here is the background: the images in HTML e-mail should be referenced using the special URI scheme "cid:" (Content-id). Please see:
http://en.wikipedia.org/wiki/URI_scheme[^],
http://tools.ietf.org/html/rfc2392[^].

The e-mail should be a multipart e-mail. Some parts could be HTML documents and some — base64-encoded images. To reference an image in one part in HTML part, HTML code <img> tag should reference the image as cid:<content-id></content-id>, where content-id should be the same as LinkedResource.ContentId of the image part to be referenced and thus rendered as inserted in HTML document.

This example illustrates using this technique for creation of e-mail with C# and .NET:
http://kosiara87.blogspot.com/2011/04/c-sending-mail-with-embedded-image.html[^].

(This is a pretty dumb code; it uses a placeholder "@@IMAGE@@" in the HTML code to be replaced with actual value for content id using string.Replace, instead of, say, using string.Format. It has nothing to do with the idea of embedding the images.)

I found this example using this query: http://bit.ly/zpvER5[^].

If you need more advanced example, try to find some more; it returned just about 227,000 results.

—SA