Xojo Plugin

Check if a MIME Entity is multipart/alternative

Demonstrates the Chilkat Mime.IsMultipartAlternative method, which returns whether the Content-Type is exactly multipart/alternative. 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: Recognizing multipart/alternative matters because its children are the same content in different formats — you display one (usually the last renderable), not all of them. That is the opposite of multipart/mixed, where every child is shown.

Chilkat Xojo Plugin Downloads

Download Chilkat for Xojo Plugin

Xojo Plugin

Dim success As Boolean
success = False

//  Demonstrates the Mime.IsMultipartAlternative method, which returns whether the Content-Type is multipart/alternative.  It takes no arguments.

Dim mime As New Chilkat.Mime
success = mime.LoadMimeFile("qa_data/multipart_message.eml")
If (success = False) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

If (mime.IsMultipartAlternative()) Then
    System.DebugLog("This is a multipart/alternative entity.")
Else
    System.DebugLog("This is not multipart/alternative.")
End If