Pascal (Lazarus/Delphi)

Render an Email to MIME in a StringBuilder

Demonstrates the Chilkat MailMan.RenderToMimeSb method, which renders an Email object as MIME text and appends the result to a StringBuilder, without sending the email. This example renders a message into a StringBuilder and prints it.

Background: This is the StringBuilder version of RenderToMime. Appending into a StringBuilder is more efficient when the MIME is large or when you plan to further inspect or manipulate it — searching, replacing, or accumulating additional text — without creating extra intermediate string copies.

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Pascal (Lazarus/Delphi)

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.MailMan,
  Chilkat.StringBuilder,
  Chilkat.Email;

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

procedure RunDemo;
var
  success: Boolean;
  mailman: TMailMan;
  email: TEmail;
  sbMime: TStringBuilder;

begin
  success := False;

  //  Demonstrates the MailMan.RenderToMimeSb method, which renders an Email object as MIME text
  //  and appends the result to a StringBuilder (without sending the email).

  mailman := TMailMan.Create;

  //  Build the email to render.
  email := TEmail.Create;
  email.Subject := 'Rendered email';
  email.From := 'alice@example.com';
  email.AddTo('Bob','bob@example.com');
  email.Body := 'This message is rendered to MIME in a StringBuilder.';

  //  Render the MIME into a StringBuilder.
  sbMime := TStringBuilder.Create;

  success := mailman.RenderToMimeSb(email,sbMime);
  if (success = False) then
    begin
      WriteLn(mailman.LastErrorText);
      Exit;
    end;

  WriteLn(sbMime.GetAsString());


  mailman.Free;
  email.Free;
  sbMime.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.