Delphi2009之TStringBuilder类[4]:Insert与Remove

Delphi 2009 之 TStringBuilder 类[4]: Insert 与 Remove

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 的插入与删除

procedure TForm1.Button1Click(Sender: TObject);

var

  sb: TStringBuilder;

begin

  sb := TStringBuilder.Create;

  sb.Append('CodeGear 2007');

  sb.Insert(Length('CodeGear '), 'Delphi ');

  ShowMessage(sb.ToString);      {CodeGear Delphi 2007}

  sb.Remove(Length('CodeGear Delphi'), Length(' 2007'));

  ShowMessage(sb.ToString);      {CodeGear Delphi}

  sb.Insert(sb.Length, ' 2009');

  ShowMessage(sb.ToString);      {CodeGear Delphi 2009}

  sb.Free;

end;

end.