Send Email with Embedded Images in VB.NET¶

In previous section, I introduced how to send email with attachment. In this section, I will introduce how to send email with embedded images in VB.NET.

Sections:

Introduction
[VB.NET - Send Email with Embedded Images - Example]
[VB.NET - Send Email with Embedded Images - ImportHtml - Example]

Introduction¶

To attach an embedded images to email, you should add an attachment to email at first. Then you should assign an unique identifier(contentid) to this attachment. Finally, you need to replace the <img src="your file name" /> to <img src="cid:yourcontentid" />.

Note

Remarks: All of samples in this section are based on first section: Send email in a simple VB.NET project. To compile and run the following example codes successfully, please click here to learn how to create the test project and add reference of EASendMail to your project.

[VB.NET - Send Email with Embedded Images - Example]¶

The following example codes demonstrate how to send email with embedded images in VB.NET.

Note

To get the full sample projects, please refer to Samples section.

Imports EASendMail 'Add EASendMail namespace

Module Module1
    Sub Main()
        Try
            Dim oMail As New SmtpMail("TryIt")
            ' Set sender email address, please change it to yours
            oMail.From = "test@emailarchitect.net"
            ' Set recipient email address, please change it to yours
            oMail.To = "support@emailarchitect.net"

            ' Set email subject
            oMail.Subject = "test HTML email with embedded image"

            ' Add image attachment from local disk
            Dim oAttachment As Attachment = oMail.AddAttachment("d:\test.gif")

            ' Specifies the attachment as an embedded picture
            ' contentid can be any string.
            Dim contentID As String = "test001@host"
            oAttachment.ContentID = contentID
            oMail.HtmlBody = "<html><body>this is a <img src=""cid:" _
                     + contentID + """> embedded picture.</body></html>"

            ' Your SMTP server address
            Dim oServer As New SmtpServer("smtp.emailarchitect.net")

            ' User and password for ESMTP authentication
            oServer.User = "test@emailarchitect.net"
            oServer.Password = "testpassword"

            ' Most mordern SMTP servers require SSL/TLS connection now.
            ' ConnectTryTLS means if server supports SSL/TLS, SSL/TLS will be used automatically.
            oServer.ConnectType = SmtpConnectType.ConnectTryTLS

            ' If your SMTP server uses 587 port
            ' oServer.Port = 587

            ' If your smtp server requires SSL/TLS connection, please use
            ' oServer.ConnectType = SmtpConnectType.ConnectSSLAuto

            Console.WriteLine("start to send email with embedded image ...")

            Dim oSmtp As New SmtpClient()
            oSmtp.SendMail(oServer, oMail)

            Console.WriteLine("email was sent successfully!")
        Catch ep As Exception
            Console.WriteLine("failed to send email with the following error:")
            Console.WriteLine(ep.Message)
        End Try
    End Sub
End Module

To attach embedded images/pictures, SmtpMail.ImportHtmlBody and SmtpMail.ImportHtml methods are strongly recommended. With these methods, you don’t have to specify the ContentID manually. The html source/file html body can be imported to email with embedded pictures automatically.

[VB.NET - Send Email with Embedded Images - ImportHtml - Example]¶

The following example codes demonstrate how to send email using ImportHtml method with embedded images in VB.NET.

Note

To get the full sample projects, please refer to Samples section.

Imports EASendMail 'Add EASendMail namespace

Module Module1

    Sub Main()

        Try
            Dim oMail As New SmtpMail("TryIt")
            ' Set sender email address, please change it to yours
            oMail.From = "test@emailarchitect.net"
            ' Set recipient email address, please change it to yours
            oMail.To = "support@emailarchitect.net"

            ' Set email subject
            oMail.Subject = "test HTML email with embedded image"

           ' Import html body and also import linked image as embedded images.
           ' test.gif is in c:\\my picture
 oMail.ImportHtml( "<html><body>test <img src=""test.gif""> importhtml</body></html>", _
                    "c:\my picture",  _
                    ImportHtmlBodyOptions.ImportLocalPictures Or ImportHtmlBodyOptions.ImportCss )

            ' Your SMTP server address
            Dim oServer As New SmtpServer("smtp.emailarchitect.net")

            ' User and password for ESMTP authentication
            oServer.User = "test@emailarchitect.net"
            oServer.Password = "testpassword"

            ' Most mordern SMTP servers require SSL/TLS connection now.
            ' ConnectTryTLS means if server supports SSL/TLS, SSL/TLS will be used automatically.
            oServer.ConnectType = SmtpConnectType.ConnectTryTLS

            ' If your SMTP server uses 587 port
            ' oServer.Port = 587

            ' If your SMTP server requires SSL/TLS connection on 25/587/465 port
            ' oServer.Port = 25 ' 25 or 587 or 465
            ' oServer.ConnectType = SmtpConnectType.ConnectSSLAuto

            Console.WriteLine("start to send email with embedded image ...")

            Dim oSmtp As New SmtpClient()
            oSmtp.SendMail(oServer, oMail)

            Console.WriteLine("email was sent successfully!")
        Catch ep As Exception
            Console.WriteLine("failed to send email with the following error:")
            Console.WriteLine(ep.Message)
        End Try

    End Sub

End Module

You can also refer to the htmlmail.* samples in EASendMail Installer. Those samples demonstrate how to build a HTML email editor and send HTML email with attachment or embedded images/pictures.

Next Section

At next section I will introduce how to sign email with digital certificate.

Tutorial Index

Send Email with Embedded Images in VB.NET¶

Introduction¶

[VB.NET - Send Email with Embedded Images - Example]¶

[VB.NET - Send Email with Embedded Images - ImportHtml - Example]¶

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