delphi webbrowser 经常用法演示样例
var Form : IHTMLFormElement ;
D:IHTMLDocument2 ;
begin
with WebBrowser1 do begin
D := Document as IHTMLDocument2;
Form := D.Forms.item( 'form1 ',0) as IHTMLFormElement; //form1为表单名
//title为表单中的文本框
(form.item( 'title ',0) as IHTMLElement).setAttribute( 'value ',s_title,0);
(form.item( 'content ',0) as IHTMLElement).setAttribute( 'value ',edit1.text,0);
(form.item( 'add ',0) as IHTMLElement).click;//add为button名称
end;在delphi的WebBrowser中获取和设置Input表单值
var
i:Integer;
myole:oleVariant;
begin
myole := wb1.Document;
for i := 0 to myole.all.length - 1 do
begin
if myole.all.item(i).tagName = 'INPUT' then
begin
mmo1.Lines.Add(myole.all.item(i).name);
mmo1.Lines.Add(myole.all.item(i).value);
end;
end;
end;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
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//打开空页面, 并写入...
WebBrowser1.Navigate('about:<head><title>标题></title><body>页面内容</body>');
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//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
//也能够这样读:
s := WebBrowser1.OleObject.document.parentWindow.str;
i := WebBrowser1.OleObject.document.parentWindow.num;
ShowMessage(s); //Hello
ShowMessage(IntToStr(i)); //99
end;
假如网页中有这种语句:
<script>
var
str = "Hello";
i = 99;
</script>
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//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, 须要:
WebBrowser1.OleObject.document.parentWindow.execScript('MB()','JavaScript'); //HTML-Js
end;
假如有这种脚本:
<script>
function MB(){
alert('HTML-Js');
}
</script>
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//推断网页及内部框架网页是否全部完成下载
procedure TForm1.WebBrowser1DocumentComplete(ASender: TObject;
const pDisp: IDispatch; var URL: OleVariant);
begin
if WebBrowser1.Application = pDisp then
begin
Text := '网页完成下载！';
end;
end;
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//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';
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//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;
假如网页中有这种内容:
<span id=span1>这是 span1 标签中的内容</span>
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//获取网页源码
var
s: string;
begin
s := WebBrowser1.OleObject.document.body.innerHTML; //body内的全部代码
s := WebBrowser1.OleObject.document.body.outerHTML; //body内的全部代码, 包括body标签
s := WebBrowser1.OleObject.document.documentElement.innerHTML; //html内的全部代码
end;
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//WebBrowser 中的右键菜单
//先要加入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;
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//新页面写入
begin
WebBrowser1.Navigate('about:blank');
WebBrowser1.OleObject.Document.Writeln('ok');
end;
自己主动登录
单个frames的输入
var
o : Olevariant;
begin
o := WebBrowser.OleObject.document.all.item('LoginUserID',0); //找到登录username的输入框
o.value := 'TEST';
o := WebBrowser.oleobject.document.all.item('LoginPassword',0); //找到登录password的输入框
o.value := 'TEST'
WebBrowser.oleobject.document.Forms.Item(0, 0).submit; //第一个表单提交
{
o :=WebBrowser.oleobject.document.all.item('Login',0); //或者用指定表单名称提交
o.Click; //点击操作，对其他对象也可相同操作
}
end;
多个frames的输入，FrameIndex为Frame的序号
var
o : Olevariant;
begin
//找到登录username的输入框
o := WebBrowser.oleobject.document.documentelement.document.frames.item(FrameIndex).document.all.item('LoginUserID',0);
o.value := 'TEST';
//找到登录password的输入框
o := WebBrowser.oleobject.document.documentelement.document.frames.item(FramIndex).document.all.item('LoginPassword',0);
o.value := 'TEST'
//第一个表单提交
WebBrowser.oleobject.document.documentelement.document.frames.item(FramIndex).document.Forms.Item(0, 0).submit;
{
//或者用指定表单名称提交
o :=WebBrowser.oleobject.document.documentelement.document.frames.item(FramIndex)..document.all.item('Login',0);
o.Click; //点击操作，对其他对象也可相同操作
}
end; 
