B4X

Check if a MIME Entity is multipart/related

Demonstrates the Chilkat Mime.IsMultipartRelated method, which returns whether the Content-Type is exactly multipart/related. It takes no arguments.

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

Background: multipart/related signals that the parts belong together — typically an HTML body plus the inline images it references by Content-ID. Detecting it tells your code the non-primary parts are embedded resources, not standalone attachments to list.

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Dim success As Boolean = False

'  Demonstrates the Mime.IsMultipartRelated method, which returns whether the Content-Type is multipart/related.  It takes no arguments.

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


If mime.IsMultipartRelated Then
    Log("This is a multipart/related entity.")
Else
    Log("This is not multipart/related.")
End If