(Delphi DLL) Determine if Connected and Logged On

The IsConnected property indicates whether or not the FTP component has a valid TCP/IP connection (and is logged on) to the FTP server.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Ftp2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
ftp: HCkFtp2;
success: Boolean;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

ftp := CkFtp2_Create();

CkFtp2_putHostname(ftp,'ftp.example.com');
CkFtp2_putUsername(ftp,'mylogin');
CkFtp2_putPassword(ftp,'mypassword');

// Connect and login to the FTP server.
success := CkFtp2_Connect(ftp);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    Exit;
  end;

// ...

// At any point in an FTP session, the IsConnected property
// can be checked to determine if the component has remained
// connected to the FTP server.
if (CkFtp2_getIsConnected(ftp) = True) then
  begin
    Memo1.Lines.Add('Connected!');
  end
else
  begin
    Memo1.Lines.Add('Not connected!');
  end;

// ...

success := CkFtp2_Disconnect(ftp);

CkFtp2_Dispose(ftp);

end;