(VB.NET UWP/WinRT) Send HTML Email with Attachments

Demonstrates how to send an HTML email with file attachments.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim mailman As New Chilkat.MailMan

mailman.SmtpHost = "smtp.my-starttls-mail-server.com"

mailman.SmtpUsername = "MY-SMTP-USERNAME"
mailman.SmtpPassword = "MY-SMTP-PASSWORD"

mailman.StartTLS = True
mailman.SmtpPort = 587

' Create a new email object
Dim email As New Chilkat.Email
email.Subject = "Test SMTP API to Send HTML Email with Attachments"
email.From = "Joe Programmer <joe@my-starttls-mail-server.com>"
email.AddTo("Chilkat Support","support@chilkatsoft.com")

' Add a plain-text alternative body, which will likely never be seen.
' (It is shown if the receiving email client is incapable of displaying HTML email.)
email.AddPlainTextAlternativeBody("This is a plain-text alternative body...")

' Our HTML will include an image, so add the related image here.
Dim contentIdStarfish As String = email.AddRelatedFile("qa_data/jpg/starfish.jpg")
If (email.LastMethodSuccess <> True) Then
    Debug.WriteLine(email.LastErrorText)
    Exit Sub
End If


' The src attribute for the image tag is set to the contentIdStarfish:
Dim sbHtml As New Chilkat.StringBuilder
sbHtml.Append("<html><body><p>This is an HTML email with an embedded image.</p>")
sbHtml.Append("<p><img src=""cid:CONTENT_ID_STARFISH"" /></p></body></html>")
Dim numReplacements As Integer = sbHtml.Replace("CONTENT_ID_STARFISH",contentIdStarfish)

email.AddHtmlAlternativeBody(sbHtml.GetAsString())

' Finally, add some attachments to the email.
' Add a file attachment.
Dim success As Boolean = email.AddFileAttachment2("qa_data/pdf/fishing.pdf","application/pdf")
If (success <> True) Then
    Debug.WriteLine(email.LastErrorText)
    Exit Sub
End If


' Add an attachment where the content is contained in a string.
Dim content As String = "This is the content of the 2nd attached file."
email.AddStringAttachment("someText.txt",content)


' Send the HTML email.
success = Await mailman.SendEmailAsync(email)
If (success <> True) Then
    Debug.WriteLine(mailman.LastErrorText)
    Exit Sub
End If


success = Await mailman.CloseSmtpConnectionAsync()
If (success <> True) Then
    Debug.WriteLine("Connection to SMTP server not closed cleanly.")
End If


Debug.WriteLine("HTML email with attachments sent!")