Delphi 2009之TStringBuilder类[7]: ToString

unit Unit1;

interface
uses
　Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
　Dialogs, StdCtrls;
type
　TForm1 = class(TForm)
　　Button1: TButton;
　　procedure Button1Click(Sender: TObject);
　end;

var

　Form1: TForm1;
implementation
{$R *.dfm}

//TStringBuilder.ToString 可以带参数

procedure TForm1.Button1Click(Sender: TObject);
var
　sb: TStringBuilder;
begin
　sb := TStringBuilder.Create('123456789');
　ShowMessage(sb.ToString);　　　 {123456789}
　ShowMessage(sb.ToString(3, 4)); {4567}
　sb.Free;
end;
end.