B4X

Remove a Part from a Multipart MIME Entity

Demonstrates the Chilkat Mime.RemovePart method, which removes the direct child at a zero-based index. The only argument is the index; valid values are 0 through NumParts - 1. An out-of-range index returns false and changes nothing.

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: Removing a part is how you strip an attachment or drop an unwanted alternative when reprocessing a message. Because parts are addressed by position, be mindful that removing one shifts the indexes of those after it — when deleting several, iterate from the last index downward so earlier removals do not renumber the parts you still intend to remove.

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Dim success As Boolean = False

Dim mime As ChilkatMime
mime.Initialize
success = mime.LoadMimeFile("qa_data/multipart_message.eml")
If success = False Then
    Log(mime.LastErrorText)
    Return
End If


'  Remove the direct child part at a zero-based index.  Valid indexes are 0 through NumParts - 1.
'  Here the last part is removed.
Dim lastIndex As Int = mime.NumParts - 1
success = mime.RemovePart(lastIndex)
If success = False Then
    Log(mime.LastErrorText)
    Return
End If


Log("Parts remaining: " & mime.NumParts)