Delphi ActiveX

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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var
success: Integer;
mime: TChilkatMime;

begin
success := 0;

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

mime := TChilkatMime.Create(Self);
success := mime.LoadMimeFile('qa_data/multipart_message.eml');
if (success = 0) then
  begin
    Memo1.Lines.Add(mime.LastErrorText);
    Exit;
  end;

if (mime.IsMultipartRelated()) then
  begin
    Memo1.Lines.Add('This is a multipart/related entity.');
  end
else
  begin
    Memo1.Lines.Add('This is not multipart/related.');
  end;