VB.NET

Create a multipart/mixed MIME Entity

Demonstrates the Chilkat Mime.NewMultipartMixed method, which initializes the object as an empty multipart/mixed entity, clearing any existing content. It takes no arguments; child parts 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/mixed is the container for independent parts shown one after another — the classic "message body plus attachments" layout. Each child is its own distinct content, unlike multipart/alternative (competing renderings of the same thing) or multipart/related (a part and its embedded resources). Start here, then AppendPart a body and AppendPartFromFile the attachments.

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Dim success As Boolean = False

'  Demonstrates the Mime.NewMultipartMixed method, which initializes the object as an empty
'  multipart/mixed entity, clearing any existing headers, body, and child parts.  It takes no
'  arguments.

Dim mime As New Chilkat.Mime

success = mime.NewMultipartMixed()
If (success = False) Then
    Debug.WriteLine(mime.LastErrorText)
    Exit Sub
End If


'  Append child parts.  multipart/mixed is the container for a message body plus attachments.
Dim bodyPart As New Chilkat.Mime
success = bodyPart.SetBodyFromPlainText("See the attached report.")
If (success = False) Then
    Debug.WriteLine(bodyPart.LastErrorText)
    Exit Sub
End If

success = mime.AppendPart(bodyPart)
If (success = False) Then
    Debug.WriteLine(mime.LastErrorText)
    Exit Sub
End If


success = mime.AppendPartFromFile("qa_data/report.pdf")
If (success = False) Then
    Debug.WriteLine(mime.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Number of parts: " & mime.NumParts)