How to add images from resources folder as attachment and embed into outlook mail body in C#

Question

I have a couple of images stored in visual studio project Resources folder, and I have to load them and display on the outlook mail body. Here it is the code:

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Answer 1

Create an attachment and set the PR_ATTACH_CONTENT_ID property (DASL name "http://schemas.microsoft.com/mapi/proptag/0x3712001F") using Attachment.PropertyAccessor.

Your HTML body (MailItem.HTMLBody property) would then need to reference that image attachment through the cid:

img src="cid:xyz"

where xyz is the value of the PR_ATTACH_CONTENT_ID property.

Look at an existing message with OutlookSpy (click IMessage button).

attachment = mailitem.Attachments.Add("c:\temp\MyPicture.jpg")
attachment.PropertyAccessor.SetProperty("http://schemas.microsoft.com/mapi/proptag/0x3712001F", "MyId1")
mailitem.HTMLBody = "Test image "