delphi webbrowser用法集锦

(2012-05-13 08:29:00)

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it

WebBrowser1.GoHome;  //到浏览器默认主页

WebBrowser1.Refresh;  //刷新

WebBrowser1.GoBack;  //后退

WebBrowser1.GoForward;  //前进

WebBrowser1.Navigate('...');  //打开指定页面

WebBrowser1.Navigate('about:blank');  //打开空页面

//打开空页面, 并写入...

WebBrowser1.Navigate('about:<head><title>标题</title><body>页面内容</body>');

//读取网页脚本中的变量:

procedure TForm1.Button1Click(Sender: TObject);

var

  s: string;

  i: Integer;

begin

  s := WebBrowser1.OleObject.document.Script.str;

  i := WebBrowser1.OleObject.document.Script.num;

  ShowMessage(s);  //Hello

  ShowMessage(IntToStr(i));  //99

  //也可以这样读:

  s := WebBrowser1.OleObject.document.parentWindow.str;

  i := WebBrowser1.OleObject.document.parentWindow.num;

  ShowMessage(s);  //Hello

  ShowMessage(IntToStr(i));  //99

end;

&amp;amp;lt;br&amp;amp;gt;假如网页中有这样的语句:&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;script&amp;amp;amp;amp;gt;&amp;amp;lt;br&amp;amp;gt;var&amp;amp;lt;br&amp;amp;gt;

  str =

&amp;amp;quot;Hello&amp;amp;quot;;&amp;amp;lt;br&amp;amp;gt;

  i =

99;&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;/script&amp;amp;amp;amp;gt;

//调用网页脚本中的函数:

procedure TForm1.Button1Click(Sender: TObject);

begin

  WebBrowser1.OleObject.document.parentWindow.MB(); //HTML-Js

  //如需指定脚本语言, 需要:

  WebBrowser1.OleObject.document.parentWindow.execScript('MB()','JavaScript'); //HTML-Js

end;

&amp;amp;lt;br&amp;amp;gt;假如有这样的脚本:&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;script&amp;amp;amp;amp;gt;&amp;amp;lt;br&amp;amp;gt;function

 MB(){ &amp;amp;lt;br&amp;amp;gt;

alert('HTML-Js');&amp;amp;lt;br&amp;amp;gt;}&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;/script&amp;amp;amp;amp;gt;

//判断网页及内部框架网页是否全部下载完毕

procedure TForm1.WebBrowser1DocumentComplete(ASender: TObject;

  const pDisp: IDispatch; var URL: OleVariant);

begin

  if WebBrowser1.Application = pDisp then

  begin

    Text := '网页下载完毕！';

  end;

end;

//改变背景色或背景图片:

WebBrowser1.OleObject.document.body.bgcolor := '#FF0000';

WebBrowser1.OleObject.document.body.background := '...图片地址';

//操作有 ID 标签的对象:

var

  s: string;

begin

  s := WebBrowser1.OleObject.document.getElementByIdx_x('span1').innerText;

  ShowMessage(s);  //这是 span1 标签中的内容

  //或者:

  s := WebBrowser1.OleObject.document.parentWindow.span1.innerText;

  ShowMessage(s);  //这是 span1 标签中的内容

  //隐藏它:

  WebBrowser1.OleObject.document.parentWindow.span1.style.display := 'none';

end;

&amp;amp;lt;br&amp;amp;gt;假如网页中有这样的内容:&amp;amp;lt;br&amp;amp;gt;&amp;amp;amp;amp;lt;span

 id=span1&amp;amp;amp;amp;gt;这是 span1

标签中的内容&amp;amp;amp;amp;lt;/span&amp;amp;amp;amp;gt;&amp;amp;lt;br&amp;amp;gt;

//获取网页源代码

var

  s: string;

begin

  s := WebBrowser1.OleObject.document.body.innerHTML; //body内的所有代码

  s := WebBrowser1.OleObject.document.body.outerHTML; //body内的所有代码, 包含body标签

  s := WebBrowser1.OleObject.document.documentElement.innerHTML; //html内的所有代码

end;

//获取网页全部源代码

uses ActiveX;

var

  ms: TMemoryStream;

begin

  if not Assigned(WebBrowser1.Document) then Exit;

  ms := TMemoryStream.Create;

  (WebBrowser1.Document as IPersistStreamInit).Save(TStreamAdapter.Create(ms), True);

  ms.Position := ;

  Memo1.Lines.LoadFromStream(ms, TEncoding.UTF8);

//  Memo1.Lines.LoadFromStream(ms, TEncoding.Default); {GB2312 等双字节}

  ms.Free;

end;

//WebBrowser 中的右键菜单

//先要添加ApplicationEvents1,指定其Message事件

//屏蔽右键菜单

procedure TForm1.ApplicationEvents1Message(var Msg: tagMSG; var Handled: Boolean);

begin

  with Msg do

  begin

    if not IsChild(WebBrowser1.Handle, hWnd) then Exit;

    Handled := (message = WM_RBUTTONDOWN) or (message = WM_RBUTTONUP) or (message = WM_CONTEXTMENU);

  end;

end;

//替换右键菜单

procedure TForm1.ApplicationEvents1Message(var Msg: tagMSG; var Handled: Boolean);

var mPoint: TPoint;

begin

  if IsChild(WebBrowser1.Handle, Msg.Hwnd) and

     ((Msg.Message = WM_RBUTTONDOWN) or (Msg.Message = WM_RBUTTONUP)) then

  begin

      GetCursorPos(mPoint);  //得到光标位置

      PopupMenu1.Popup(mPoint.X, mPoint.Y);   //弹出popupmenu1的菜单

      Handled:=True;

  end;

end;

//新页面写入

begin

  WebBrowser1.Navigate('about:blank');

  WebBrowser1.OleObject.Document.Writeln('ok');

end;

//从流中写入:

var

  ms: TMemoryStream;

begin

  ms := TMemoryStream.Create;

  Memo1.Lines.SaveToStream(ms);

  ms.Position := ;

  (WebBrowser1.Document as IPersistStreamInit).Load(TStreamAdapter.Create(ms));

  ms.Free;

end;

//禁止提示脚步错误

procedure TForm1.WebBrowser1NavigateComplete2(ASender: TObject;

  const pDisp: IDispatch; var URL: OleVariant);

begin

  WebBrowser1.Silent := True;

end;

//禁止弹出窗口

procedure TForm1.WebBrowser1NewWindow2(ASender: TObject; var ppDisp: IDispatch;

  var Cancel: WordBool);

begin

  Cancel := True;

end;

注： 出处 http://blog.sina.com.cn/s/blog_4ad042e50102e0z0.html