XE3随笔5:Format与转义字符

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses SuperObject;

//Format
procedure TForm1.Button1Click(Sender: TObject);
var
  jo: ISuperObject;
begin
  jo := SO('{"Name":"张三", "Age":88, "Tel":["111,222"], "Children":{"Name":"张继"}}');

  ShowMessage(jo.Format('姓名: %Name%; 年龄: %Age%'));

  ShowMessage(jo.Format('%Tel%; %Tel[0]%; %Tel[1]%'));

  ShowMessage(jo.Format('%Children%; %Children.Name%'));

  ShowMessage(jo.Format('[Name], [Age]', '[', ']')); {可更换默认的 % 标记}
end;

//特殊字符
procedure TForm1.Button2Click(Sender: TObject);
var
  jo: ISuperObject;
begin
  jo := SO;

  { \u }
  jo := SO('"\u0041\u0042\u0043"');
  ShowMessage(jo.AsString);

  { \x }
  jo := SO('"\x41\x42\x43"');
  ShowMessage(jo.AsString);

  { \u 汉字}
  jo := SO('"\u4e07\u4e00"');
  ShowMessage(jo.AsString);

  { \u 后面的数字可大写 }
  jo := SO('"\u4E07\u4E00"');
  ShowMessage(jo.AsString);

  { \\、\/ }
  jo := SO('"A\\B\/C"');
  ShowMessage(jo.AsString);

  { \t、\n 还有 \b、\f、\r }
  jo := SO('"A\tB\nC"');
  ShowMessage(jo.AsString);

  { \"" }
  jo := SO('"\"ABC\""');
  ShowMessage(jo.AsString);

  { null 是 JSON 的一种数据类型, 代表空值, 空值也是值的一种 }
  jo := SO('[1,2,3,null]');
  ShowMessage(jo.AsString);
end;

end.