delphi之模拟点击网页中的按钮-优快云博客

本文介绍如何利用Delphi开发一个包含Web浏览器组件的应用，通过编写简单的代码实现导航、点击按钮等功能，适用于Delphi初学者和Web集成开发者。

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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;
Button4: TButton;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
WebBrowser1.Align := alTop;
Button2.Enabled := False;
Button3.Enabled := False;
Button4.Enabled := False;
Button1.Caption := '模拟一个页面';
Button2.Caption := '假如知道按钮名称';
Button3.Caption := '假如知道按钮的 ID';
Button4.Caption := '假如只知道是第几个按钮';
end;

{模拟一个页面}
procedure TForm1.Button1Click(Sender: TObject);
begin
WebBrowser1.Navigate(
'about:<head><title>标题</title><body>' +
'<form method="POST" action="'">http://www.nobird.org/">' +
'<input type="submit" value="提交" id="btnID" name="btnName">' +
'</form></body>');
Button2.Enabled := True;
Button3.Enabled := True;
Button4.Enabled := True;
end;

{假如知道按钮名称, 譬如是: btnName}
procedure TForm1.Button2Click(Sender: TObject);
begin
WebBrowser1.OleObject.document.all.item('btnName').click;
//WebBrowser1.OleObject.document.all.item('btnName', 0).click;
FormCreate(nil);
end;

{假如知道按钮的 ID, 譬如是: btnID}
procedure TForm1.Button3Click(Sender: TObject);
begin
WebBrowser1.OleObject.document.getElementByID('btnID').click;
FormCreate(nil);
end;

{假如只知道是第几个按钮, 譬如是第一个}
procedure TForm1.Button4Click(Sender: TObject);
begin
WebBrowser1.OleObject.document.getElementsByTagName('input').item(0).click;
FormCreate(nil);
end;

end.