public:howto:tmimepart [Ararat Synapse]

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====== TMimeMess And TMimePart Objects ======

Synapse class implementing a mime-formatted message. Commonly used to encode/decode email messages. TMimeMess contains one or more TMimeParts.
TMimeMess provides support for assembling, encoding/decoding and modifying mime messages. TMimemess contains one root TMimePart class, what can hold any subsequent tree of next tMimepart classes called as SubParts.

For access to subpart (subpart is nested MimePart) are methods:

  * GetSubPartCount return count of subpart. (it is like Count method in stringlists.)
  * GetSubPart return subpart with reqested index. You can use for cycle from 0 to GetSubPartCount-1 for access to all subparts on this message level.
  * Addsubpart add new subpart. ;-)
  * ClearSubParts clears and destroy all subparts.

This functions allows easy access to any part in message.

example:

You have tmimepart object called 'm', where is decomposed message. 
You need get headers of first subpart, whitch is second subpart of 
root multipart. For this you can use:

  m.getsubpart(1).getsubpart(0).Headers

Example for create mail message with attached file:
<code delphi>
procedure TForm1.Button13Click(Sender: TObject);
var
  m:TMimemess;
  l:tstringlist;
  p: TMimepart;
begin
  m:=TMimemess.create;
  l:=tstringlist.create;
  try
    p := m.AddPartMultipart('mixed', nil);
    l.loadfromfile('c:\search.log');
    m.AddPartText(l,p);
    m.AddPartBinaryFromFile('c:\search.log',p);
    m.header.from:='youraddress@somewhere.com';
    m.header.tolist.add('You@somewhere.com');
    m.header.subject:='test message';
    m.EncodeMessage;
    memo1.lines.assign(m.lines);
  finally
    m.free;
    l.free;
  end;
end;
</code>

See MailAttach demo for another example.

Related subjects: TMimePart TSMTPSend TMimeMess