Ajax realizes three-level linkage (with code)
This time I will bring you ajax to realize three-level linkage (with code). What are the precautions for ajax to realize three-level linkage? . Here is a practical case, let’s take a look.
1. First place a p on a page to facilitate future reference methods
<body> <p id="sanji">//p的id为“sanji” </p>
2.sanji js processing page
$(document).ready(function(){
//向p里面放三个下拉菜单
var str = "<select id='sheng'></select>
<select id='shi'></select>
<select id='qu'></select>";
//给三个下拉列表定义 str 变量
$("#sanji").html(str);
FillSheng();
FillShi();
FillQu();//Sheng Shi Qu的逻辑顺序
$("#sheng").change(function(){
FillShi();
FillQu();
})//给sheng菜单添加点击事件
$("#shi").change(function(){
FillQu();
})//给shi菜单添加点击事件
});//页面加载完成之后过来执行某些代码3. Fill in the sheng method
function FillSheng()
{
var pcode = "";//定义一个变量
$.ajax({
url:"chuli.php",
data:{pcode:pcode},
type:"POST",
dataType:"TEXT",
success:function(data){
var hang = data.split("^");
str +="<option value='"+lie[0]+"'>"+lie[1]+"</option>";
}
$("#sheng").html(str);
});
}2.Fill shi method
function FillShi()
{
var pcode = $("#sheng").val();
$.ajax({
async:false,
url:"chuli.php",
data:{pcode:pcode},
type:"POST",
dataType:"TEXT",
success: function(data){
var hang = data.split("|");
var str = "";
for(var i=0;i<hang.length;i++)
{
var lie = hang[i].split("^");
str += "<option value='"+lie[0]+"'>"+lie[1]+"</option>";
}
$("#shi").html(str);
}
});
}3.Fill qu method
function FillQu()
{
var pcode = $("#shi").val();
$.ajax({
url:"chuli.php",
data:{pcode:pcode},
type:"POST",
dataType:"TEXT",
success: function(data){
var hang = data.split("|");
var str = "";
for(var i=0;i<hang.length;i++)
{
var lie = hang[i].split("^");
str += "<option value='"+lie[0]+"'>"+lie[1]+"</option>";
}
$("#qu").html(str);
}
});
}4.chuli page
<?php
include("DBDA.class.php");
$db = new DBDA();
$pcode = $_POST["pcode"];
$sql = "select * from chinastates where parentareacode='{$pcode}'";
echo $db->StrQuery($sql);I believe you have mastered the method after reading the case in this article, more Please pay attention to other related articles on the php Chinese website!
Recommended reading:
How does ajax make a partial page jump function
ajax.load() method in jQuery How to use
The above is the detailed content of Ajax realizes three-level linkage (with code). For more information, please follow other related articles on the PHP Chinese website!
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