Delphi2009之TStringBuilder类[3]:Replace

Delphi 2009 之 TStringBuilder 类[3]: Replace

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;

    procedure Button1Click(Sender: TObject);

    procedure Button2Click(Sender: TObject);

    procedure Button3Click(Sender: TObject);

    procedure Button4Click(Sender: TObject);

  end;

var

  Form1: TForm1;

implementation

{$R *.dfm}

//TStringBuilder.Replace 替换字符串

procedure TForm1.Button1Click(Sender: TObject);

var

  sb: TStringBuilder;

begin

  sb := TStringBuilder.Create;

  sb.Append('从 Delphi 2007 到 Delphi 2009');

  sb.Replace('Delphi', 'CBuilder');

  ShowMessage(sb.ToString);         {从 CBuilder 2007 到 CBuilder 2009}

  sb.Free;

end;

//TStringBuilder.Replace 替换字符

procedure TForm1.Button2Click(Sender: TObject);

var

  sb: TStringBuilder;

begin

  sb := TStringBuilder.Create;

  sb.Append('从 Delphi 2007 到 Delphi 2009');

  sb.Replace('0', '9');

  ShowMessage(sb.ToString);         {从 Delphi 2997 到 Delphi 2999}

  sb.Free;

end;

//TStringBuilder.Replace 在指定范围内替换字符

procedure TForm1.Button3Click(Sender: TObject);

var

  sb: TStringBuilder;

begin

  sb := TStringBuilder.Create;

  sb.Append('ABABABABABAB');

  sb.Replace('A', '-', 4, 5);

  ShowMessage(sb.ToString);    {ABAB-B-B-BAB}

  sb.Free;

end;

//TStringBuilder.Replace 在指定范围内替换字符串

procedure TForm1.Button4Click(Sender: TObject);

var

  sb: TStringBuilder;

begin

  sb := TStringBuilder.Create;

  sb.Append('ABC123ABC123ABC123');

  sb.Replace('ABC', '-', 3, 12);

  ShowMessage(sb.ToString);      {ABC123-123-123}

  sb.Free;

end;

end.