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Код: Выделить всё

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    Button1: TButton;
    BitBtn1: TBitBtn;
    OpenDialog1: TOpenDialog;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  f:TextFile;
  fName:String[80];
  buf:String[80];
begin
  if not OpenDialog1.Execute
    then exit;
  fName:=OpenDialog1.FileName;
  Form1.Caption:=fName;
  AssignFile(f,FName);
  try
    Reset(f);
  except
    on EInOutError do
  begin
    ShowMessage('Ошибка открытия');
    exit;
  end;
end;
  while not EOF(f) do
    begin
      readln(f,buf);
      Memo1.Lines.Add(buf);
    end;
  CloseFile(f);
end;


procedure TForm1.FormCreate(Sender: TObject);
begin
 OpenDialog1.Filter:='Текстовые файлы(*txt)';
end;

end.