Pascal (Lazarus/Delphi)

Set the Email Date Header to the Current System Date/Time

Demonstrates how to set the Date header field of an email to the computer's current date/time. Note: When an email object is instantiated, the Date header field is automatically added and initialized to the current system date/time. The need to explicitly set the Date header could arise when loading an email from a .eml. 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.Email,
  Chilkat.CkDateTime;

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

procedure RunDemo;
var
  success: Boolean;
  email: TEmail;
  dateTime: TCkDateTime;

begin
  success := False;

  email := TEmail.Create;

  //  At this point, a new email object has been instantiated, and it
  //  already has a Date header field containing the current date/time.
  WriteLn('Date: ' + email.EmailDateStr);

  //  We can also get the Date header like this:
  WriteLn('Date: ' + email.GetHeaderField('Date'));

  //  Load a .eml into the email object:
  success := email.LoadEml('myEmlFiles/someEmail.eml');
  if (success <> True) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  //  Show the Date that was in the .eml
  WriteLn('Date: ' + email.EmailDateStr);

  //  Now the Date header contains whatever was in the .eml
  //  Let's update it to the current system date/time..

  dateTime := TCkDateTime.Create;

  dateTime.SetFromCurrentSystemTime();

  success := email.SetDt(dateTime);
  if (success <> True) then
    begin
      WriteLn(email.LastErrorText);
      Exit;
    end;

  //  Now show that the Date is the current system time:
  WriteLn('Date: ' + email.EmailDateStr);
  WriteLn('Date: ' + email.GetHeaderField('Date'));


  email.Free;
  dateTime.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.