(VB.NET UWP/WinRT) Create Complex Email

This is an example showing how to create an email that has file attachments, contains both plain-text and HTML alternative bodies, and has embedded images within the HTML. The email is saved to a .eml file, which is a text file and can be viewed in any text editor. EML is nothing more than the MIME source of an email. In this example, you'll see that the MIME is structured in three layers of multipart content types. The outermost layer is multipart/mixed. This is typically where you'll find file attachments and attached messages. Underneath the multipart/mixed is a multipart/related envelope. Within this you'll find the "related" items -- which are the items belonging to the HTML body (images and style sheets). Underneath the multipart/related you'll find the multipart/alternative, and this contains the text/plain and text/html alternative bodies.

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 email As New Chilkat.Email

' Adding attachments, HTML/plain-text bodies, etc can be done
' in any order:

' Add an attachment
Dim contentType As String = email.AddFileAttachment("hamlet.zip")
If (email.LastMethodSuccess <> True) Then
    Debug.WriteLine(email.LastErrorText)
    Exit Sub
End If


' Add some headers:
email.Subject = "This is a complex email"
Dim success As Boolean = email.AddTo("Chilkat Support","support@chilkatsoft.com")
email.From = "Matt <matt@chilkatsoft.com>"

' Add a plain-text body:
success = email.AddPlainTextAlternativeBody("This is the plain-text body")

' Add an image that will be embedded in the HTML body.
Dim contentIdDude As String = email.AddRelatedFile("dude.gif")
If (email.LastMethodSuccess <> True) Then
    Debug.WriteLine(email.LastErrorText)
    Exit Sub
End If

' Update the CONTENT_ID_DUDE to the actual content ID when sending the email.
success = email.SetReplacePattern("CONTENT_ID_DUDE",contentIdDude)


' Add an HTML body:
Dim html As String
html = "<html><body><b>This is the HTML body</b><br><img src=""cid:CONTENT_ID_DUDE""></body></html>"

success = email.AddHtmlAlternativeBody(html)

' Save the email as a .eml

success = email.SaveEml("complex.eml")
If (success <> True) Then
    Debug.WriteLine(email.LastErrorText)
Else
    Debug.WriteLine("Created email!")
End If