動態生成的DOM不會觸發onclick事件的原因及解決方法
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2024-02-22
本文簡單實現jQuery無限級聯效果，分享給大家供大家參考，具體內容如下
效果圖：
圖1 僅下拉框
圖2 層級提示+下拉框
圖3 存儲數據點擊響應
主要包含3個文件：index.html（主頁），wuxianjilian.php（數據處理），wuxianjilian.sql（MySQL數據文件）
1. index.html
<html>
<head>
<title>無限級聯</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="Content-Language" content="zh-CN" />
<script type="text/javascript" src="http://files.cnblogs.com/Zjmainstay/jquery-1.6.2.min.js"></script>
</head>
<body>
<div id="jilianContainer"></div>
<script type="text/javascript">
$(document).ready(function(){
var getData = function(obj){
$.ajax({
url:'wuxianjilian.php',
type:'POST',
data:{"pid":obj.val()},
dataType:'json',
async:false,
success:function(data){
if($(".selection").length){
$(".selection:gt("+$(obj).index()+")").remove(); //移除后面所有子級下拉菜單
$(".selection:last").after(data); //添加子級下拉菜單
}else {
$("#jilianContainer").append(data); //初始加載情況
}
//所有下拉響應
$(".selection").unbind().change(function(){
getData($(this));
});
},
error:function(msg){
alert('error');
}
});
}
//Init
getData($(this));
});
</script>
< 數據存儲示例，僅提取數據，不做操作 -->
<div style="height:100px;display:block;"></div>
<input type="button" value="存儲數據" id="save"></input>
<script type="text/javascript">
$(document).ready(function(){
$("#save").click(function(){
var data = [];
$(".selection").each(function(){
data.push($.trim($(this).val()));
})
alert(data.join(','));
});
});
</script>
</body>
</html>
2. wuxianjilian.php
<?php
header("Content-type: text/html; charset=utf-8");
//數據庫連接操作
$conn = mysql_connect("localhost","Zjmainstay","") or die("Can not connect to database.Fatal error handle by ". __FILE__);
mysql_select_db("test",$conn); //數據庫名為 test
mysql_query("SET NAMES utf8",$conn);
//獲取父級id
$pid = (int)$_POST['pid'];
//查詢子級
$sql = "SELECT id,text FROM `wuxianjilian` WHERE pid={$pid}";
$result = mysql_query($sql,$conn);
//組裝子級下拉菜單
$html = '';
while($row = mysql_fetch_assoc($result)){
$html .= '<option value="'.$row['id'].'">'.$row['text'].'</option>';
}
if(!empty($html)) $html = '<select class="selection"><option value="">請選擇</option>' . $html . '</select>';
//輸出下拉菜單
echo json_encode($html);
//End_php
3. wuxianjilian.sql
wuxianjilian.sql
/*
Navicat MySQL Data Transfer
Source Server : localhost
Source Server Version : 50516
Source Host : localhost:3306
Source Database : test
Target Server Type : MYSQL
Target Server Version : 50516
File Encoding : 65001
Date: 2012-10-24 20:59:09
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `wuxianjilian`
-- ----------------------------
DROP TABLE IF EXISTS `wuxianjilian`;
CREATE TABLE `wuxianjilian` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`pid` int(11) DEFAULT NULL,
`text` varchar(32) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of wuxianjilian
-- ----------------------------
INSERT INTO `wuxianjilian` VALUES ('1', '0', 'A0');
INSERT INTO `wuxianjilian` VALUES ('2', '0', 'B0');
INSERT INTO `wuxianjilian` VALUES ('3', '1', 'C1');
INSERT INTO `wuxianjilian` VALUES ('4', '1', 'D1');
INSERT INTO `wuxianjilian` VALUES ('5', '1', 'E1');
INSERT INTO `wuxianjilian` VALUES ('6', '2', 'F2');
INSERT INTO `wuxianjilian` VALUES ('7', '2', 'G2');
INSERT INTO `wuxianjilian` VALUES ('8', '3', 'H3');
INSERT INTO `wuxianjilian` VALUES ('9', '3', 'I3');
INSERT INTO `wuxianjilian` VALUES ('10', '3', 'J3');
INSERT INTO `wuxianjilian` VALUES ('11', '3', 'K3');
INSERT INTO `wuxianjilian` VALUES ('12', '4', 'L4');
INSERT INTO `wuxianjilian` VALUES ('13', '4', 'M4');
INSERT INTO `wuxianjilian` VALUES ('14', '8', 'N8');
INSERT INTO `wuxianjilian` VALUES ('15', '9', 'N9');
INSERT INTO `wuxianjilian` VALUES ('16', '14', 'O14');
INSERT INTO `wuxianjilian` VALUES ('17', '14', 'P14');
INSERT INTO `wuxianjilian` VALUES ('18', '14', 'Q14');
INSERT INTO `wuxianjilian` VALUES ('19', '17', 'R17');
INSERT INTO `wuxianjilian` VALUES ('20', '17', 'S18');
INSERT INTO `wuxianjilian` VALUES ('21', '20', 'T20');
如果大家還想深入學習，可以點擊jquery下拉框效果匯總、JavaScript下拉框效果匯總進行學習。
希望本文所述對大家學習jquery程序設計有所幫助。
