在 Delphi 中调用 JavaScript(1) 回复 "fancy" 的问题

问题来源: http://www.cnblogs.com/del/archive/2008/07/30/1256669.html#1272732

源码下载: https://files.cnblogs.com/del/Dephi-JavaScript.rar

本例测试用的 Html 文件(包含三个要测试的 Js 函数):

本例效果图:

代码文件:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    WebBrowser1: TWebBrowser;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
var
  HtmlPath: string;
begin
  WebBrowser1.Left := -WebBrowser1.Width; {隐藏 WebBrowser1}
  HtmlPath := ExtractFilePath(ParamStr(0)) + 'Test.htm';
  WebBrowser1.Navigate(HtmlPath);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  str: Variant;
begin
  str := WebBrowser1.OleObject.document.parentWindow.JsStr2('12345');
  ShowMessage(str);
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  num: Variant;
begin
  num := WebBrowser1.OleObject.document.parentWindow.JsNum2(4);
  ShowMessage(num);
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  WebBrowser1.OleObject.document.parentWindow.JsMsg('ABC');

  {也可以这样:}
  WebBrowser1.OleObject.document.parentWindow.execScript('JsMsg("ABCDEFG")', 'JavaScript');
end;

end.

窗体文件:

object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 167
  ClientWidth = 280
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  Position = poDesktopCenter
  OnCreate = FormCreate
  PixelsPerInch = 96
  TextHeight = 13
  object WebBrowser1: TWebBrowser
    Left = 64
    Top = 48
    Width = 154
    Height = 97
    TabOrder = 0
    ControlData = {
      4C000000EB0F0000060A00000000000000000000000000000000000000000000
      000000004C000000000000000000000001000000E0D057007335CF11AE690800
      2B2E126208000000000000004C0000000114020000000000C000000000000046
      8000000000000000000000000000000000000000000000000000000000000000
      00000000000000000100000000000000000000000000000000000000}
  end
  object Button1: TButton
    Left = 104
    Top = 40
    Width = 75
    Height = 25
    Caption = 'Button1'
    TabOrder = 1
    OnClick = Button1Click
  end
  object Button2: TButton
    Left = 104
    Top = 81
    Width = 75
    Height = 25
    Caption = 'Button2'
    TabOrder = 2
    OnClick = Button2Click
  end
  object Button3: TButton
    Left = 104
    Top = 120
    Width = 75
    Height = 25
    Caption = 'Button3'
    TabOrder = 3
    OnClick = Button3Click
  end
end