Xojo Plugin

Create a multipart/alternative MIME Entity

Demonstrates the Chilkat Mime.NewMultipartAlternative method, which initializes the object as an empty multipart/alternative entity. It takes no arguments; the alternative representations are then appended.

Background: multipart/alternative holds several renderings of the same content and lets the client pick the best one it can display — the standard way to send an email as both plain text and HTML. Order matters: parts go from least to most preferred, so the plain-text version comes first and the HTML last, and a client shows the last one it understands.

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Xojo Plugin

Dim success As Boolean
success = False

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

Dim mime As New Chilkat.Mime

success = mime.NewMultipartAlternative()
If (success = False) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

//  multipart/alternative holds two representations of the SAME content; the client displays the
//  last one it can render.  Add a plain-text part, then an HTML part.
Dim textPart As New Chilkat.Mime
success = textPart.SetBodyFromPlainText("Hello (plain text version).")
If (success = False) Then
    System.DebugLog(textPart.LastErrorText)
    Return
End If

success = mime.AppendPart(textPart)
If (success = False) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

Dim htmlPart As New Chilkat.Mime
success = htmlPart.SetBodyFromHtml("<html><body><b>Hello</b> (HTML version).</body></html>")
If (success = False) Then
    System.DebugLog(htmlPart.LastErrorText)
    Return
End If

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

System.DebugLog("Number of alternatives: " + Str(mime.NumParts))