您的位置:首页 > 编程语言 > Delphi

Delphi_判断Webbrowser打开的网页组件是否存在?

2016-05-13 11:43 429 查看
网页代码:

[html] view
plain copy

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<title>新建网页 1</title>

<script>

function aa(){

alert("abc");

}

</script>

</head>

<body>

<form method="POST" action="--WEBBOT-SELF--">

<p><input type="button" value="按钮" name="B3" onclick="aa()"></p>

</form>

</body>

</html>

delphi判断网页中是否存在某个名字的控件

[delphi] view
plain copy

unit Unit1;

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, OleCtrls, SHDocVw, StdCtrls, MSHTML_TLB;

type

TForm1 = class(TForm)

WebBrowser1: TWebBrowser;

Button1: TButton;

procedure FormCreate(Sender: TObject);

procedure Button1Click(Sender: TObject);

private

{ Private declarations }

public

{ Public declarations }

end;

var

Form1: TForm1;

implementation

uses Math;

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);

begin

WebBrowser1.Navigate('c:\index.htm');

end;

procedure TForm1.Button1Click(Sender: TObject);

var b:IHTMLElement;

begin

b:=(WebBrowser1.Document as IHTMLDocument3).getElementById('B3');

if b=nil then exit;//这里判断网页中是不是找到了这个按钮,如果换成B4就不能执行下面的代码了

b.click;

end;

end.
内容来自用户分享和网络整理,不保证内容的准确性,如有侵权内容,可联系管理员处理 点击这里给我发消息
标签: