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ajax实现三级联动
无意苦争春的博客
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查询数据库中的chinastates表,通过父级代号查询相应省市区.

实现界面:

904017-20160520185440138-52688405.png

在js页面实现三级联动

在JQuery中调用Ajax方法(引用JQuery文件一定放在最上面)

用插件的形式,创建三个下拉列表

一、主页面:

<!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=utf-8" />
<title>ajax三级联动</title>
<script src="../jquery-1.11.2.min.js"></script>
<script src="sanji.js"></script>
</head>

<body>
<h1>三级联动</h1>
<div id="sanji"></div>

</body>
</html>

二、在js页面实现三级联动 

// JavaScript Document
$(document).ready(function(e) {
    
    //将DIV里面写入三个下拉列表
    $("#sanji").html("<select id='sheng'></select><select id='shi'></select><select id='qu'></select>");
    
    //填充内容,显示在页面上
    //1.填充省
    FillSheng();    
    
    //2.填充市
    FillShi();
        
    //3.填充区
    FillQu();    
    
    //如果省选中变化的时候,去填充市和区
    $("#sheng").change(function(){
        //改变市
        FillShi();
        //改变区
        FillQu();
                
        })
        
        
    //如果市选中变化的时候,去改动区
    
    $("#shi").change(function(){
        //改变区
        FillQu();
                
        })
        
        
        //填充省的方法
        function FillSheng()
        {
            //找到父级代号
            var pcode="0001";
            
            //调用ajax
            $.ajax({
                async:false,
                url:"ChuLi.php",
                data:{pcode:pcode},
                type:"POST",
                dataType:"TEXT",
                success:function(data){
                    
                    var str="";
                    var hang=data.split("|");
                    for(var i=0; i<hang.length; i++)
                    {
                        var lie=hang[i].split("^");
                        
                        str+="<option value='"+lie[0]+"'>"+lie[1]+"</option>";
                        }
                $("#sheng").html(str);
                    
                    
                    }
            
                });
                
    
            }
            
        //填充市的方法
        function FillShi()
        {
            //找到父级代号
            var pcode=$("#sheng").val();
            
            //调用ajax
            $.ajax({
                async:false,
                url:"ChuLi.php",
                data:{pcode:pcode},
                type:"POST",
                dataType:"TEXT",
                success:function(data){
                    
                    var str="";
                    var hang=data.split("|");
                    for(var i=0; i<hang.length; i++)
                    {
                        var lie=hang[i].split("^");
                        
                        str+="<option value='"+lie[0]+"'>"+lie[1]+"</option>";
                        }
                $("#shi").html(str);
                }
            
                });
            
            }
            
            
        //填充区的方法
        function FillQu()
        {
            //找到父级代号
            var pcode=$("#shi").val();
            
            //调用ajax
            $.ajax({
                async:false,
                url:"ChuLi.php",
                data:{pcode:pcode},
                type:"POST",
                dataType:"TEXT",
                success:function(data){
                    
                    var str="";
                    var hang=data.split("|");
                    for(var i=0; i<hang.length; i++)
                    {
                        var lie=hang[i].split("^");
                        
                        str+="<option value='"+lie[0]+"'>"+lie[1]+"</option>";
                        }
                $("#qu").html(str);
                }
                
            
                });
                
    
            }
    
    
    
});

三、处理页面:

<?php
//取到传过来的父级代号
$pcode=$_POST["pcode"];
//引入类
include ("../DBDA.class.php");
$db=new DBDA();
//写SQL语句
$sql="select AreaCode, AreaName, ParentAreaCode from chinastates where ParentAreaCode='{$pcode}'";
//执行
echo $db->StrQuery($sql);


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