VB.NET

Append a Part to a Multipart MIME Entity

Demonstrates the Chilkat Mime.AppendPart method, which appends a copy of another Mime as the last direct child. The only argument is the source Mime. Chilkat copies it, so later changes to the source do not affect the appended part.

Background: This is the general way to build up a multipart entity from parts you construct yourself — a text body, an HTML body, a nested multipart. Because it appends a copy, you can reuse and modify the source object afterward, or append it more than once, without surprises. For attaching a file directly, AppendPartFromFile is more convenient.

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Dim success As Boolean = False

'  Demonstrates the Mime.AppendPart method, which appends a copy of another Mime as the last direct
'  child.  The only argument is the Mime to append.  Chilkat copies it, so later changes to the
'  source do not affect the appended part.

Dim mime As New Chilkat.Mime
success = mime.NewMultipartMixed()
If (success = False) Then
    Debug.WriteLine(mime.LastErrorText)
    Exit Sub
End If


'  Build a part and append a copy of it.
Dim part As New Chilkat.Mime
success = part.SetBodyFromPlainText("This is an appended part.")
If (success = False) Then
    Debug.WriteLine(part.LastErrorText)
    Exit Sub
End If


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


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