delphi webbrowser 经常使用的演示样本

2022-02-05 13:44:23

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

--------------------------------------------------------------------------------

//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>

--------------------------------------------------------------------------------

//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>

--------------------------------------------------------------------------------

//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;

--------------------------------------------------------------------------------

//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;

假如网页中有这种内容:

<span id=span1>这是 span1 标签中的内容</span>

--------------------------------------------------------------------------------

//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;

--------------------------------------------------------------------------------

//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;

--------------------------------------------------------------------------------

//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;

{

//或用指定的名称提交表单

o :=WebBrowser.oleobject.document.documentelement.document.frames.item(FramIndex)..document.all.item('Login',0);

o.Click;    //点击操作，其它的目的还可以是相同的操作

}

end;

码农公寓

相关文章