在 Delphi 中調用 JavaScript(2)

本例:

代碼檔案:

unit Unit1;interfaceuses  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,  Dialogs, StdCtrls;type  TForm1 = class(TForm)    Memo1: TMemo;    Button1: TButton;    Edit1: TEdit;    Label1: TLabel;    procedure Button1Click(Sender: TObject);  end;var  Form1: TForm1;implementation{$R *.dfm}uses ComObj;{此函數需要 ComObj 單元的支援}{參數 JsCode 是要執行的 Js 代碼; 參數 JsVar 是要返回的變數}function RunJs(const JsCode, JsVar: string): string;var  script: OleVariant;begin  try    script := CreateOleObject('ScriptControl');    script.Language := 'JavaScript';    script.ExecuteStatement(JsCode);    Result := script.Eval(JsVar);  except    Result := '';  end;end;procedure TForm1.Button1Click(Sender: TObject);var  s: string;begin  s := RunJs(Memo1.Text, 'str');  ShowMessage(s);end;end.

表單檔案:

object Form1: TForm1  Left = 0  Top = 0  Caption = 'Form1'  ClientHeight = 167  ClientWidth = 244  Color = clBtnFace  Font.Charset = DEFAULT_CHARSET  Font.Color = clWindowText  Font.Height = -11  Font.Name = 'Tahoma'  Font.Style = []  OldCreateOrder = False  Position = poDesktopCenter  PixelsPerInch = 96  TextHeight = 13  object Label1: TLabel    Left = 10    Top = 140    Width = 72    Height = 13    Caption = #35201#36820#22238#30340#21464#37327  end  object Memo1: TMemo    Left = 0    Top = 0    Width = 244    Height = 121    Align = alTop    Font.Charset = DEFAULT_CHARSET    Font.Color = clWindowText    Font.Height = -13    Font.Name = 'Courier New'    Font.Style = []    Lines.Strings = (      'Memo1')    ParentFont = False    ScrollBars = ssBoth    TabOrder = 0    ExplicitWidth = 323  end  object Button1: TButton    Left = 159    Top = 134    Width = 75    Height = 25    Caption = #25191#34892#20195#30721    TabOrder = 1    OnClick = Button1Click  end  object Edit1: TEdit    Left = 85    Top = 136    Width = 61    Height = 21    TabOrder = 2    Text = 'str'  endend