TStringList als Result

[Luckie]

Mach es mit einer Klassen-Methode. (Ist auch der bessere Stil, finde ich.)

Hauptformular:

Delphi-Quellcode:

type
  TForm1 = class(TForm)
    Button1: TButton;
    ListBox1: TListBox;
    procedure Button1Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses
  Unit2;

procedure TForm1.Button1Click(Sender: TObject);
var
  sl: TStringList;
begin
  sl := TStringList.Create;
  try
    if TForm2.GetUserInput(sl) then
      Listbox1.Items.Text := sl.Text;
  finally
    FreeAndNil(sl);
  end;
end;

Eingabeformular:

Delphi-Quellcode:

type
  TForm2 = class(TForm)
    Label1: TLabel;
    Edit1: TEdit;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
    class function GetUserInput(out sl: TStringList): Boolean;
  end;

var
  Form2: TForm2;

implementation

{$R *.dfm}

class function TForm2.GetUserInput(out sl: TStringList): Boolean;
begin
  with TForm2.Create(nil) do
  begin
    ShowModal();
    sl.Add(Edit1.Text);
    Result := length(Edit1.Text) <> 0;
    Free();
  end;
end;

procedure TForm2.Button1Click(Sender: TObject);
begin
  ModalResult := mrOK;
end;

procedure TForm2.Button2Click(Sender: TObject);
begin
  ModalResult := mrCancel;
end;

Klappt wunderbar.