WebBrowser 操作记要（万一博客）

anggi_luo 2010-12-28

展开全文

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:<br> <script><br> var<br> str =

"Hello";<br> i = 99;<br> </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:<br> <script><br> function MB(){ <br> alert

(''HTML-Js'');<br> }<br> </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:<br> <span id=span1>这是 span1 标签中的内

容</span><br>

//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;

模拟点击网页中的按钮

操作链接