Delphi 2009之TStringBuilder类[2]: Append与AppendFormat

unit Unit1;

interface
uses
　Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
　Dialogs, StdCtrls;
type
　TForm1 = class(TForm)
　　Button1: TButton;
　　Button2: TButton;
　　Button3: TButton;
　　Button4: TButton;
　　Button5: TButton;
　　procedure Button1Click(Sender: TObject);
　　procedure Button2Click(Sender: TObject);
　　procedure Button3Click(Sender: TObject);
　　procedure Button4Click(Sender: TObject);
　　procedure Button5Click(Sender: TObject);
　end;

var

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

//TStringBuilder.Append 可以添加几乎所有数据类型, 甚至是对象

procedure TForm1.Button1Click(Sender: TObject);
var
　sb1,sb2: TStringBuilder;
　ver: Cardinal;
begin
　sb1 := TStringBuilder.Create;
　sb2 := TStringBuilder.Create;
　sb1.Append('Delphi ');
　ver := 2009;
　sb1.Append(ver);
　ShowMessage(sb1.ToString); {Delphi 2009}
　sb2.Append(sb1);
　{换行}
　sb2.AppendLine;
　sb2.Append(Self);
　ShowMessage(sb2.ToString); {Delphi 2009
　　　　　　　　　　　　　　　TForm1}
　sb1.Free;
　sb2.Free;
end;