WebBrowser 操作记要 (DELPHI)

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;

假如网页中有这样的语句: <script> var str = "Hello"; i = 99; </script>

//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;

假如有这样的脚本: <script> function MB(){ alert('HTML-Js'); } </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.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: <span id="span1">这是 span1 标签中的内容</span>

//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;

//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;