B4X

Create a multipart/related MIME Entity

Demonstrates the Chilkat Mime.NewMultipartRelated method, which initializes the object as an empty multipart/related entity. It takes no arguments; the primary part and its related resources are then appended.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: multipart/related ties a primary part to the resources it references — most commonly an HTML body and the inline images it embeds via cid: references. Unlike a plain attachment, a related image is displayed within the message rather than listed separately. The HTML part comes first, followed by each referenced resource with a matching Content-ID.

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Dim success As Boolean = False

'  Demonstrates the Mime.NewMultipartRelated method, which initializes the object as an empty
'  multipart/related entity, clearing any existing content.  It takes no arguments.

Dim mime As ChilkatMime
mime.Initialize

success = mime.NewMultipartRelated
If success = False Then
    Log(mime.LastErrorText)
    Return
End If


'  multipart/related groups a primary part with the resources it references, such as an HTML body
'  and the inline images it displays.
Dim htmlPart As ChilkatMime
htmlPart.Initialize
success = htmlPart.SetBodyFromHtml("<html><body><img src=" & Chr(34) & "cid:logo" & Chr(34) & "></body></html>")
If success = False Then
    Log(htmlPart.LastErrorText)
    Return
End If

success = mime.AppendPart(htmlPart)
If success = False Then
    Log(mime.LastErrorText)
    Return
End If


success = mime.AppendPartFromFile("qa_data/logo.png")
If success = False Then
    Log(mime.LastErrorText)
    Return
End If


Log("Number of parts: " & mime.NumParts)