Delphi ActiveX

Attach a File to a Multipart MIME Entity

Demonstrates the Chilkat Mime.AppendPartFromFile method, which reads a local file, creates an attachment part, and appends it. The only argument is the file path; the content headers are chosen from the filename extension.

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

Background: This is the one-call way to add an attachment: Chilkat reads the file, infers its Content-Type from the extension, base64-encodes binary content, and appends it as a child part — typically inside a multipart/mixed. It is the building block behind adding attachments to an email, saving you from constructing the part and setting its headers by hand.

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var
success: Integer;
mime: TChilkatMime;
bodyPart: TChilkatMime;

begin
success := 0;

//  Demonstrates the Mime.AppendPartFromFile method, which reads a local file, creates an attachment
//  part, and appends it.  The only argument is the file path; the content headers are chosen from
//  the filename extension.

mime := TChilkatMime.Create(Self);
success := mime.NewMultipartMixed();
if (success = 0) then
  begin
    Memo1.Lines.Add(mime.LastErrorText);
    Exit;
  end;

//  A message body part.
bodyPart := TChilkatMime.Create(Self);
success := bodyPart.SetBodyFromPlainText('Please see the attached files.');
if (success = 0) then
  begin
    Memo1.Lines.Add(bodyPart.LastErrorText);
    Exit;
  end;
success := mime.AppendPart(bodyPart.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(mime.LastErrorText);
    Exit;
  end;

//  Attach files directly.
success := mime.AppendPartFromFile('qa_data/report.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add(mime.LastErrorText);
    Exit;
  end;
success := mime.AppendPartFromFile('qa_data/photo.jpg');
if (success = 0) then
  begin
    Memo1.Lines.Add(mime.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add('Number of parts: ' + IntToStr(mime.NumParts));