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PowerBuilder

Check if a MIME Entity is multipart/alternative

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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 PowerBuilder Downloads

PowerBuilder
integer li_rc
integer li_Success
oleobject loo_Mime

li_Success = 0

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

loo_Mime = create oleobject
li_rc = loo_Mime.ConnectToNewObject("Chilkat.Mime")
if li_rc < 0 then
    destroy loo_Mime
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_Mime.LoadMimeFile("qa_data/multipart_message.eml")
if li_Success = 0 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Mime
    return
end if

if loo_Mime.IsMultipartAlternative() then
    Write-Debug "This is a multipart/alternative entity."
else
    Write-Debug "This is not multipart/alternative."
end if



destroy loo_Mime