Get the Nth Binary Part of a Content-Type into BinData

See more Email Object Examples

Demonstrates the Chilkat Email.GetNthBinaryPartOfTypeBd method, which loads the binary bytes of the Nth MIME sub-part matching a content-type pattern into a BinData object. The arguments are the zero-based index among the matching parts, the content-type pattern, an inlineOnly flag, an excludeAttachments flag, and the BinData that receives the bytes. This example extracts the first image/png part.

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Email,
  Chilkat.BinData;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  email: TEmail;
  bdImage: TBinData;
  bd: TBinData;

begin
  success := False;

  //  Demonstrates the GetNthBinaryPartOfTypeBd method, which loads the binary bytes of the Nth
  //  MIME sub-part matching a Content-Type pattern into a BinData object.  The arguments are
  //  the zero-based index among matching parts, the Content-Type pattern, inlineOnly,
  //  excludeAttachments, and the BinData that receives the bytes.

  email := TEmail.Create;
  email.Subject := 'GetNthBinaryPartOfTypeBd example';
  email.Body := 'See the attached image.';

  //  Load the image from a file into a BinData object and attach it (binary data belongs
  //  in a BinData, never in a string).
  bdImage := TBinData.Create;
  success := bdImage.LoadFile('qa_data/images/photo.png');
  if (success = False) then
    begin
      WriteLn(bdImage.LastErrorText);
      Exit;
    end;
  success := email.AddAttachmentBd('photo.png',bdImage,'image/png');
  if (success = False) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  //  Load the bytes of the first (index 0) image/png part into a BinData object.
  bd := TBinData.Create;
  success := email.GetNthBinaryPartOfTypeBd(0,'image/png',False,False,bd);
  if (success = False) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  WriteLn('image/png part size (bytes) = ' + bd.NumBytes);

  //  Note: The path "qa_data/images/photo.png" is a relative local filesystem path,
  //  relative to the current working directory of the running application.


  email.Free;
  bdImage.Free;
  bd.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.