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ajax实现城市三级联动

Ajax 2022-09-02 03:09:13 86

本文实例为大家分享了ajax实现城市三级联动的具体代码,供大家参考,具体内容如下

在准备好服务器后

html部分

<div>
        <select name="" id="province">
            <option value="">请选择省份</option>
        </select>
        <select name="" id="city">
            <option value="">请选择城市</option>
        </select>
        <select name="" id="district">
            <option value="">请选择区域</option>
        </select>
</div>

样式部分

<style>
        div {
            text-align: center;
        }

        select {
            width: 150px;
            height: 30px;
        }
</style>

js部分

<script>
        var a = 0;
        var b = 0;
        var d=null;

            $.ajax({
                type:'get',
                url:'http://127.0.0.1:6562/0929/area-json.js',
                success: function(data){         
                    d = JSON.parse(data.slice(10,-1)); //获取json数据并转化为数组数据
                    $.each(d,function(index,ele){
                    $('<option value = ""></option>').appendTo('#province').text(ele.name);//把省的数据插入列表中
                    })
            }
            })
        $('#province').on('change',function(e){  //当省变化时
            $.ajax({
                type:'get',
                url:'http://127.0.0.1:6562/0929/area-json.js',
                success: function(data){         
                    d=JSON.parse(data.slice(10,-1));
                    a = e.target.selectedIndex - 1;  //当前下拉列表下标
                    if(a == -1){
                        $('#city').html('<option value="">请选择城市</option>');
                        $('#district').html('<option value="">请选择区域</option>');
                    }else{
                        $('#city').html('<option value="">请选择城市</option>');
                        $('#district').html('<option value="">请选择区域</option>');
                        if(d[a].children){
                            $.each(d[a].children,function(index,ele){
                                $('<option value = ""></option>').appendTo('#city').text(ele.name);

                            })
                        }
                    }
            }
            })
        })
        $('#city').on('change',function(e){   //当市变化时
            $.ajax({
                type:'get',
                url:'http://127.0.0.1:6562/0929/area-json.js',
                success: function(data){         
                    d=JSON.parse(data.slice(10,-1));
                    b = e.target.selectedIndex - 1;
                    if(b == -1){
                        $('#district').html('<option value="">请选择区域</option>');
                    }else{
                        $('#district').html('<option value="">请选择区域</option>');
                        if(d[a].children[b].children){
                            $.each(d[a].children[b].children,function(index,ele){
                                $('<option value = ""></option>').appendTo('#district').text(ele.name);

                            })
                        }
                    }
            }
            })
            
        })
</script>

全部代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/1.11.3/jquery.js"></script>
    <style>
        div {
            text-align: center;
        }

        select {
            width: 150px;
            height: 30px;
        }
    </style>
</head>
<body>
    <div>
        <select name="" id="province">
            <option value="">请选择省份</option>
        </select>
        <select name="" id="city">
            <option value="">请选择城市</option>
        </select>
        <select name="" id="district">
            <option value="">请选择区域</option>
        </select>
    </div>
    <script>
        var a = 0;
        var b = 0;
        var d=null;

            $.ajax({
                type:'get',
                url:'http://127.0.0.1:6562/0929/area-json.js',
                success: function(data){         
                    d = JSON.parse(data.slice(10,-1));
                    $.each(d,function(index,ele){
                    $('<option value = ""></option>').appendTo('#province').text(ele.name);
                    })
            }
            })
        $('#province').on('change',function(e){
            $.ajax({
                type:'get',
                url:'http://127.0.0.1:6562/0929/area-json.js',
                success: function(data){         
                    d=JSON.parse(data.slice(10,-1));
                    a = e.target.selectedIndex - 1;
                    if(a == -1){
                        $('#city').html('<option value="">请选择城市</option>');
                        $('#district').html('<option value="">请选择区域</option>');
                    }else{
                        $('#city').html('<option value="">请选择城市</option>');
                        $('#district').html('<option value="">请选择区域</option>');
                        if(d[a].children){
                            $.each(d[a].children,function(index,ele){
                                $('<option value = ""></option>').appendTo('#city').text(ele.name);

                            })
                        }
                    }
            }
            })
        })
        $('#city').on('change',function(e){
            $.ajax({
                type:'get',
                url:'http://127.0.0.1:6562/0929/area-json.js',
                success: function(data){         
                    d=JSON.parse(data.slice(10,-1));
                    b = e.target.selectedIndex - 1;
                    if(b == -1){
                        $('#district').html('<option value="">请选择区域</option>');
                    }else{
                        $('#district').html('<option value="">请选择区域</option>');
                        if(d[a].children[b].children){
                            $.each(d[a].children[b].children,function(index,ele){
                                $('<option value = ""></option>').appendTo('#district').text(ele.name);

                            })
                        }
                    }
            }
            })
            
        })
    </script>
</body>
</html>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。

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