delphi的WebBrowser应用一

WebBrowser 操作记要 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:页面内容'); -------------------------------------------------------------------------------- //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; 假如网页中有这样的语句: -------------------------------------------------------------------------------- //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.getElementByID('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; 假如网页中有这样的内容: 这是 span1 标签中的内容 -------------------------------------------------------------------------------- //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: var ms: 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;