delphi TWebBrowser 用法
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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);vars: 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)); //99end;&lt;br&gt;假如网页中有这样的语句:&lt;br&gt;&amp;amp;lt;script&amp;amp;gt;&lt;br&gt;var&lt;br&gt; str = &quot;Hello&quot;;&lt;br&gt; i = 99;&lt;br&gt;&amp;amp;lt;/script&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-Jsend;&lt;br&gt;假如有这样的脚本:&lt;br&gt;&amp;amp;lt;script&amp;amp;gt;&lt;br&gt;function MB(){ &lt;br&gt; alert('HTML-Js');&lt;br&gt;}&lt;br&gt;&amp;amp;lt;/script&//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;&lt;br&gt;假如网页中有这样的内容:&lt;br&gt;&amp;amp;lt;span id=span1&amp;amp;gt;这是 span1 标签中的内容&amp;amp;lt;/span&amp;amp;gt;&lt;br&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 := 0; 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:varms: TMemoryStream;begin ms := TMemoryStream.Create; Memo1.Lines.SaveToStream(ms); ms.Position := 0; (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;
