免费小工具

type
 
  TPerson = record
    Name: string[50];
    vorname: string[50];
  end;
 
  TComputer = record
    Name: string[30];
    cpu: string[30];
  end;
 
var
  Form1: TForm1;
 
  Person: TPerson;
  Computer: TComputer;
 
  Stream: TFileStream;
 
implementation
 
{$R *.DFM}
 
//Speichern resp. Erstellen von Datei
//Save or create the file
procedure TForm1.Button1Click(Sender: TObject);
begin
  try
    Stream := TFileStream.Create('c:\test.dat', fmOpenReadWrite);
  except
    Stream := TFileStream.Create('c:\test.dat', fmCreate);
  end;
 
  //2 Einträge pro Record
  //save 2 records for TPerson and TComputer
  Person.Name    := 'Grossenbacher';
  Person.vorname := 'Simon';
  Stream.WriteBuffer(Person, SizeOf(TPerson));
 
  Person.Name    := 'Stutz';
  Person.vorname := 'Thomas';
  Stream.WriteBuffer(Person, SizeOf(TPerson));
 
  Computer.Name := 'Delphi';
  Computer.cpu  := 'Intel';
  Stream.WriteBuffer(Computer, SizeOf(TComputer));
 
  Computer.Name := 'Win';
  Computer.cpu  := 'AMD';
  Stream.WriteBuffer(Computer, SizeOf(TComputer));
 
  Stream.Free;
end;
 
//lädt alle daten von TPerson in listbox1 und
//daten von TComputer in Listbox2
 
//load records from TPerson to listbox1 and
//load records from TComputer to listbox2
procedure TForm1.Button2Click(Sender: TObject);
var
  i: Integer;
begin
  try
    // nur lesen öffnen
    //open read only
    Stream := TFileStream.Create('c:\test.dat', fmOpenRead);
  except
    ShowMessage('Datei konnte nicht geladen werden.');
    Exit;
  end;
 
  //variable i auf anzahl Einträge setzen
 
  //set variable i to the record count
 
  //Einlesen von TPerson
  //Read records TPerson
  for i := 2 downto 1 do
  begin
    Stream.ReadBuffer(Person, SizeOf(TPerson));
    Listbox1.Items.Add(Person.vorname + ' ' + Person.Name);
  end;
 
  //Einlesen von TComputer
  //Read Records TComputer
  for i := 2 downto 1 do
  begin
    Stream.ReadBuffer(Computer, SizeOf(TComputer));
    Listbox2.Items.Add(Computer.Name + ' ' + Computer.cpu);
  end;
 
  Stream.Free;
end;