动态菜单(一)
相信大家做网页的时候都会用到菜单。最近在CSDN上答题的时候，问动态菜单的还是比较多。这次就整3个动态菜单给同学们玩玩。方便刚入门的小鸟速度掌握。
正所谓天下文章大家抄，抄来抄去有提高.去百度一个JS+CSS菜单。CSS菜单
效果还算一般。我们把它抄袭下来 以后留用.
先来看看HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>导航菜单</title>
<style>
body,td,th {
font-family: Tahoma, Verdana, Arial, sans-serif;
font-size: 12px;
color: #333333;
}
body {
margin-left: 0px;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
}
a {
color: #333333;
text-decoration: none;
}
a:hover {
color: #FF0000;
text-decoration: none;
}
a:active{
color: #FF0000;
text-decoration: none;
}
#menu{
height:32px;
margin-top:8px; background-color:#990000;
}
#menu ul{
margin:auto; width:778px; height:32px;
list-style-type:none; padding:0px; margin-top:0px; margin-bottom:0px;
}
.m_li{
float:left; width:114px; line-height:32px; text-align:center; margin-right:-2px; margin-left:-2px;
}
.m_li a{
display:block; color:#FFFFFF; width:114px;
}
.m_line{
float:left; width:1px; height:32px;
line-height:32px; /*ff下有效(图片垂直居中)*/
}
.m_line img{
margin-top:expression(( 32 - this.height ) / 2); /*ie下有效(图片垂直居中)*/
}
.m_li_a{
float:left; width:114px; line-height:32px; text-align:center; padding-top:3px; font-weight:bold;
background-image:url(/jscss/demoimg/200904/menu_bg2.jpg); position:relative; height:32px; margin-top:-3px; margin-right:-2px; margin-left:-2px;
}
.m_li_a a{
display:block; color:#FF0000; width:114px;
}
.smenu{
width:774px; margin:0px auto 0px auto; padding:0px; list-style-type:none; height:32px;
}
.s_li{
line-height:32px; width:auto; display:none; height:32px;
}
.s_li_a{
line-height:32px; width:auto; display:block; height:32px;
}
</style>
<script>
//初始化
var def="1";
function mover(object){
//主菜单
var mm=document.getElementById("m_"+object);
mm.className="m_li_a";
//初始主菜单隐藏效果
if(def!=0){
var mdef=document.getElementById("m_"+def);
mdef.className="m_li";
}
//子菜单
var ss=document.getElementById("s_"+object);
ss.style.display="block";
//初始子菜单隐藏效果
if(def!=0){
var sdef=document.getElementById("s_"+def);
sdef.style.display="none";
}
}
function mout(object){
//主菜单
var mm=document.getElementById("m_"+object);
mm.className="m_li";
//初始主菜单
if(def!=0){
var mdef=document.getElementById("m_"+def);
mdef.className="m_li_a";
}
//子菜单
var ss=document.getElementById("s_"+object);
ss.style.display="none";
//初始子菜单
if(def!=0){
var sdef=document.getElementById("s_"+def);
sdef.style.display="block";
}
}
</script>
</head>
<body>
<div id="menu">
<ul>
<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>
<li id="m_1" class='m_li_a'><a href="#">财税首页</a></li>
<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>
<li id="m_2" class='m_li' onmouseover='mover(2);' onmouseout='mout(2);'><a href="#">政务公开</a></li>
<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>
<li id="m_3" class='m_li' onmouseover='mover(3);' onmouseout='mout(3);'><a href="#">网上办事</a></li>
<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>
<li id="m_4" class='m_li' onmouseover='mover(4);' onmouseout='mout(4);'><a href="#">公告中心</a></li>
<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>
<li id="m_5" class='m_li' onmouseover='mover(5);' onmouseout='mout(5);'><a href="#">法规中心</a></li>
<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>
<li id="m_6" class='m_li' onmouseover='mover(6);' onmouseout='mout(6);'><a href="#">财税文化</a></li>
<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>
<li id="m_7" class='m_li' onmouseover='mover(7);' onmouseout='mout(7);'><a href="#">专题宣传</a></li>
<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>
</ul>
</div>
<div style="height:32px; background-color:#F1F1F1;">
<ul class="smenu">
<li style="padding-left:29px;" id="s_1" class='s_li_a'>您是本站第13122842位访客！</li>
<li style="padding-left:141px;" id="s_2" class='s_li' onmouseover='mover(2);' onmouseout='mout(2);'><a href="/">财税简介</a> | <a href="#">机构设置</a> | <a href="/">办事指南</a> | <a href="/">税种简介</a> | <a href="/">财税动态</a> | <a href="/">网页特效</a></li>
<li style="padding-left:252px;" id="s_3" class='s_li' onmouseover='mover(3);' onmouseout='mout(3);'><a href="/">下载专区</a> | <a href="/">上传专区</a> | <a href="#">申请报名</a> | <a href="#">查询系统</a> | <a href="#">咨询投诉</a> | <a href="/">满意调查</a></li>
<li style="padding-left:362px;" id="s_4" class='s_li' onmouseover='mover(4);' onmouseout='mout(4);'><a href="/">最新公告</a> | <a href="/">会计通知</a></li>
<li style="padding-left:474px;" id="s_5" class='s_li' onmouseover='mover(5);' onmouseout='mout(5);'><a href="/">最新政策</a> | <a href="#">政策法规查询</a></li>
<li style="padding-left:447px;" id="s_6" class='s_li' onmouseover='mover(6);' onmouseout='mout(6);'><a href="/">税收宣传</a> | <a href="/">最新更新</a> | <a href="#">文明创建</a> | <a href="#" target="_blank">青年论坛</a> | <a href="#">廉政课堂</a></li>
<li style="padding-left:696px;" id="s_7" class='s_li' onmouseover='mover(7);' onmouseout='mout(7);'><a href="/">专题宣传区</a></li>
</ul>
</div>
</body>
</html>
其中有定义的JS和CSS 不会不要紧。因为我们可以抄. OK开工。新建一个页面.讲这些代码复制进去 不解释.
仔细观察一下。 DIV的ID为MENU的貌似是父菜单。而下面那个DIV是加载上去的。那我们就从后台返回两个字符串用于页面绑定。一个也可以搞定。
创建数据库
USE [CSDN_Ziye]
GO
/****** 对象: Table [dbo].[Ziye_Menu] 脚本日期: 04/24/2011 20:13:53 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Ziye_Menu](
[Menu_ID] [int] NULL,
[Menu_Fid] [int] NULL,
[Menu_Name] [nvarchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[Menu_Url] [nvarchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[Menu_able] [int] NULL,
[Menu_Rel] [nvarchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
[Menu_Type] [int] NULL
) ON [PRIMARY]
其中有几个字段不需要。具体是干嘛的。下一篇会用到。。
采用拼接字符串。就像我经常CSDN解答的那样。
前台<%=str %>
后台public static string str=string.Empty;
建立个页面开整
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Ziye_Menu1._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>子夜菜单(一)</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>
body, td, th
{
font-family: Tahoma, Verdana, Arial, sans-serif;
font-size: 12px;
color: #333333;
}
body
{
margin-left: 0px;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
}
a
{
color: #333333;
text-decoration: none;
}
a:hover
{
color: #FF0000;
text-decoration: none;
}
a:active
{
color: #FF0000;
text-decoration: none;
}
#menu
{
height: 32px;
margin-top: 8px;
background-color: #990000;
}
#menu ul
{
margin: auto;
width: 778px;
height: 32px;
list-style-type: none;
padding: 0px;
margin-top: 0px;
margin-bottom: 0px;
}
.m_li
{
float: left;
width: 114px;
line-height: 32px;
text-align: center;
margin-right: -2px;
margin-left: -2px;
}
.m_li a
{
display: block;
color: #FFFFFF;
width: 114px;
}
.m_line
{
float: left;
width: 1px;
height: 32px;
line-height: 32px; /*ff下有效(图片垂直居中)*/
}
.m_line img
{
margin-top: expression(( 32 - this.height ) / 2); /*ie下有效(图片垂直居中)*/
}
.m_li_a
{
float: left;
width: 114px;
line-height: 32px;
text-align: center;
padding-top: 3px;
font-weight: bold;
background-image: url(http://www.codefans.net/jscss/demoimg/200904/menu_bg2.jpg);
position: relative;
height: 32px;
margin-top: -3px;
margin-right: -2px;
margin-left: -2px;
}
.m_li_a a
{
display: block;
color: #FF0000;
width: 114px;
}
.smenu
{
width: 774px;
margin: 0px auto 0px auto;
padding: 0px;
list-style-type: none;
height: 32px;
}
.s_li
{
line-height: 32px;
width: auto;
display: none;
height: 32px;
}
.s_li_a
{
line-height: 32px;
width: auto;
display: block;
height: 32px;
}
</style>
<script>
//初始化
var def = "1";
function mover(object) {
//主菜单
var mm = document.getElementById("m_" + object);
mm.className = "m_li_a";
//初始主菜单隐藏效果
if (def != 0) {
var mdef = document.getElementById("m_" + def);
mdef.className = "m_li";
}
//子菜单
var ss = document.getElementById("s_" + object);
ss.style.display = "block";
//初始子菜单隐藏效果
if (def != 0) {
var sdef = document.getElementById("s_" + def);
sdef.style.display = "none";
}
}
function mout(object) {
//主菜单
var mm = document.getElementById("m_" + object);
mm.className = "m_li";
//初始主菜单
if (def != 0) {
var mdef = document.getElementById("m_" + def);
mdef.className = "m_li_a";
}
//子菜单
var ss = document.getElementById("s_" + object);
ss.style.display = "none";
//初始子菜单
if (def != 0) {
var sdef = document.getElementById("s_" + def);
sdef.style.display = "block";
}
}
</script>
</head>
<body>
<%=GetMenu() %>
</body>
</html>
接下来是后台代码看注释.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Data;
namespace Ziye_Menu1
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
public string GetMenu()
{
//<div id="menu">
//<ul>
//<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>
//<li id="m_1" class='m_li_a'><a href="#">财税首页</a></li>
//<li class="m_line"><img src="http://www.codefans.net/jscss/demoimg/200904/line2.gif" /></li>
//<li id="m_2" class='m_li' onmouseover='mover(2);' onmouseout='mout(2);'><a href="#">政务公开</a></li>
//<li class="m_line"><img src="http://www.codefans.net/jscss/demoimg/200904/line2.gif" /></li>
//<li id="m_3" class='m_li' onmouseover='mover(3);' onmouseout='mout(3);'><a href="#">网上办事</a></li>
//<li class="m_line"><img src="http://www.codefans.net/jscss/demoimg/200904/line2.gif" /></li>
//<li id="m_4" class='m_li' onmouseover='mover(4);' onmouseout='mout(4);'><a href="#">公告中心</a></li>
//<li class="m_line"><img src="http://www.codefans.net/jscss/demoimg/200904/line2.gif" /></li>
//<li id="m_5" class='m_li' onmouseover='mover(5);' onmouseout='mout(5);'><a href="#">法规中心</a></li>
//<li class="m_line"><img src="http://www.codefans.net/jscss/demoimg/200904/line2.gif" /></li>
//<li id="m_6" class='m_li' onmouseover='mover(6);' onmouseout='mout(6);'><a href="#">财税文化</a></li>
//<li class="m_line"><img src="http://www.codefans.net/jscss/demoimg/200904/line2.gif" /></li>
//<li id="m_7" class='m_li' onmouseover='mover(7);' onmouseout='mout(7);'><a href="#">专题宣传</a></li>
//<li class="m_line"><img src="http://www.codefans.net/jscss/demoimg/200904/line2.gif" /></li>
//</ul>
//</div>
/*
* 这些就是用于主菜单的 我们要把“政务公开”这些换成数据库的名字，<a href="#">中的#也要换成我们数据库的链接
*
* 发现<img src="jscss/demoimg/200904/line2.gif" />在本机找不到图片 所以在前面加上http://www.codefans.net/就当引用他网站中的图片了
*
* 开抄.
*/
StringBuilder LeftList = new StringBuilder();//声明一个LeftList 用于后面拼接
try
{
LeftList.Append("<div id=\"menu\">");
LeftList.Append("<ul>");
//取出所有数据 (这里用的是我大一时候写的SqlHelper请大家不要笑话.)
DataTable Dt_TotleMenu = SqlHelper.ReturnDataTable("select * from Ziye_Menu", CommandType.Text);
DataRow[] drMenu = Dt_TotleMenu.Select("Menu_Fid=0 and Menu_able=1");//取出所有启用的父节点
DataTable LeftMenuTable = new DataTable();//构建父节点的table
LeftMenuTable = drMenu[0].Table.Clone();
foreach (DataRow dr in drMenu)
{
LeftMenuTable.ImportRow(dr);
}
if (LeftMenuTable.Rows.Count != 0)
{
for (int i = 0; i < LeftMenuTable.Rows.Count; i++)
{
/*
*观察菜单可以看出 一个节点可以包含
*<li class="m_line"><img src="/jscss/demoimg/200904/line2.gif" /></li>-------图片
*<li id="m_1" class='m_li_a'><a href="#">财税首页</a></li>--------链接和名字
* 这两个那么最后应该少一个
* <li class="m_line"><img src="http://www.codefans.net/jscss/demoimg/200904/line2.gif" /></li>---图片
*/
LeftList.Append("<li class=\"m_line\"><img src=\"http://www.codefans.net/jscss/demoimg/200904/line2.gif\" /></li>");//添加图片
if (i != 0)
{
LeftList.Append("<li id=\"m_" + (i + 1) + "\" class='m_li' onmouseover='mover(" + (i + 1) + ");' onmouseout='mout(" + (i + 1) + ");'><a href=" + LeftMenuTable.Rows[i]["Menu_Url"].ToString() + ">" + LeftMenuTable.Rows[i]["Menu_Name"].ToString() + "</a></li>");
}
else
{
LeftList.Append("<li id=\"m_1\" class='m_li_a'><a href=\"#/\">首页</a></li>");
}
//到此循环全部搞定。然后我们不要忘记缺了最后一行
}
LeftList.Append("<li class=\"m_line\"><img src=\"http://www.codefans.net/jscss/demoimg/200904/line2.gif\" /></li>");
LeftList.Append("</ul>");
LeftList.Append("</div>");
//上面的HTML 全部拼接完成
}
/*
* 到这里我们父级菜单就算绑定完了。接下来看子菜单
* <div s6tyle="height:32px; background-color:#F1F1F1;">
* <ul class="smenu">
* <li id="s_1" class='s_li_a'>大家好我是子夜</li>
* <li id="s_2" class='s_li' onmouseover='mover(2);' onmouseout='mout(2);'><a href="/">财税简介</a> | <a href="#">机构设置</a> | <a href="/">办事指南</a> | <a href="/">税种简介</a> | <a href="/">财税动态</a> | <a href="/">网页特效</a></li>
* <li id="s_3" class='s_li' onmouseover='mover(3);' onmouseout='mout(3);'><a href="/">下载专区</a> | <a href="/">上传专区</a> | <a href="#">申请报名</a> | <a href="#">查询系统</a> | <a href="#">咨询投诉</a> | <a href="/">满意调查</a></li>
* <li id="s_4" class='s_li' onmouseover='mover(4);' onmouseout='mout(4);'><a href="/">最新公告</a> | <a href="/">会计通知</a></li>
* <li id="s_5" class='s_li' onmouseover='mover(5);' onmouseout='mout(5);'><a href="/">最新政策</a> | <a href="#">政策法规查询</a></li>
* <li id="s_6" class='s_li' onmouseover='mover(6);' onmouseout='mout(6);'><a href="/">税收宣传</a> | <a href="/">最新更新</a> | <a href="#">文明创建</a> | <a href="#" target="_blank">青年论坛</a> | <a href="#">廉政课堂</a></li>
* <li id="s_7" class='s_li' onmouseover='mover(7);' onmouseout='mout(7);'><a href="/">专题宣传区</a></li>
* </ul>
*</div>
*
* 前面那些不看 （<li style="padding-left:141px;" id="s_2" class='s_li' onmouseover='mover(2);' onmouseout='mout(2);'>）
*
* 就看这个链接
*
* <a href="/">财税简介</a> | <a href="#">机构设置</a> | <a href="/">办事指南</a> | <a href="/">税种简介</a> | <a href="/">财税动态</a> | <a href="/">网页特效</a></li>
*
* 这些链接是属于一个父节点下的所有子节点拼接的。我们依照上面一样的改。
*/
//先拼接子菜单的前两行
LeftList.Append("<div s6tyle=\"height:32px; background-color:#F1F1F1;\">");
LeftList.Append("<ul class=\"smenu\">");
//遍历每一个父节点 取它下所有的子节点。然后拼子节点的HTML
for (int j = 0; j < LeftMenuTable.Rows.Count; j++)
{
/*因为<li id="s_2" class='s_li' onmouseover='mover(2);' onmouseout='mout(2);'><a href="/">财税简介</a> | <a href="#">机构设置</a> | <a href="/">办事指南</a> | <a href="/">税种简介</a> | <a href="/">财税动态</a> | <a href="/">网页特效</a></li>
*
* 所以每次遍历的时候我们先把<li id="s_2" class='s_li' onmouseover='mover(2);' onmouseout='mout(2);'>添加上
*
* 然后在遍历拼接子节点 <a href="/">财税简介</a> | <a href="#">机构设置</a> | <a href="/">办事指南</a> | <a href="/">税种简介</a> | <a href="/">财税动态</a> | <a href="/">网页特效</a>
*
* 最后加上</li> 即可
*
*/
//寻找父ID为当前父ID的子节点
DataRow[] drSencondMenu = Dt_TotleMenu.Select("Menu_Fid='" + LeftMenuTable.Rows[j]["Menu_ID"] + "' and Menu_able=1");
DataTable SecondTable = new DataTable();
SecondTable = drSencondMenu[0].Table.Clone();
foreach (DataRow dr in drSencondMenu)
{
SecondTable.ImportRow(dr);
}
if (SecondTable.Rows.Count != 0)//证明此父节点存在子节点
{
if (j == 0)
{
LeftList.Append("<li id=\"s_1\" class='s_li_a'>大家好我是子夜</li>");
}
else
{
LeftList.Append("<li id=\"s_" + (j + 1) + "\" class='s_li' onmouseover='mover(" + (j + 1) + ");' onmouseout='mout(" + (j + 1) + ");'>");
//遍历拼接子节点的HTML
for (int k = 0; k < SecondTable.Rows.Count; k++)
{
LeftList.Append("<a href=" + SecondTable.Rows[k]["Menu_Url"].ToString() + ">" + SecondTable.Rows[k]["Menu_Name"].ToString() + "</a> ");
if (k != SecondTable.Rows.Count - 1)//如果是最后一项就不加 | 了.^_^
{
LeftList.Append(" | ");
}
}
}
LeftList.Append("</li>");
}
}
LeftList.Append("</ul>");
LeftList.Append("</div>");
return LeftList.ToString();
}
catch (Exception err)
{
return "没菜单";
}
}
}
}
效果 :
193行代码 其实我们可以优化的。
比如在一个FOR循环中拼接父节点和子节点的HTML。
也可以写一个递归的方法来用。这里用简单的DataTable.来拼接的html.其实代码不是最重要的。重要的是一种思想。
有兴趣的小鸟们可以练习练习。也可以去网上抄袭几个留着以后用.
下篇 来个实战。练练抄袭的功力.
继续抢分了.
PS:源码在下一篇有下载.