Stringlisten in mehreren Prozeduren nutzen

[DeddyH]

Ich kann das Problem nicht nachvollziehen
Hier mal eine Testunit:

Delphi-Quellcode:

unit UnitNix;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private-Deklarationen }
    sl: TStringList;
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
begin
  sl := TStringList.Create;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  if Assigned(sl) then
    FreeAndNil(sl);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if Assigned(sl) then
    begin
      sl.Add('eine Zeile');
      Button2Click(self);
      Button3Click(self);
    end;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  if Assigned(sl) then
    sl.Add('eine weitere Zeile');
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  if Assigned(sl) then
    sl.SaveToFile('C:\blablubb.txt');
end;

end.