时间:2021-07-01 10:21:17 帮助过:3人阅读
基本思想就是:在JS动态创建select控件的option,通过Ajax获取在PHP从SQL数据库获取的省市区信息,代码有点长,但很多都是类似的,例如JS中省、市、区获取方法类似,PHP中通过参数不同执行不同的select语句。
index.html代码:
代码如下:
- <!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>
- <title>省市区三级联动</title>
- <META http-equiv=Content-Type content="text/html; charset=gb2312">
- <script src="scripts/thumbnails.js" type="text/javascript"></script>
- </head>
- <body>
- <p id="description">
- <select style="width:100px; " onchange="sech(this.id)" id="sheng">
- <option value="province">请选择省份</option>
- </select>
- <select onchange="sech(this.id)" id="shi">
- <option value="city">请选择市区</option>
- </select>
- <select id="xian">
- <option value="county">请选择县乡</option>
- </select>
- </p>
- </p>
- </body>
- </html>
thumbnails.js代码:
代码如下:
- window.onload = getProvince;
- function createRequest() {//Ajax于PHP交互需要对象
- try {
- request = new XMLHttpRequest();//创建一个新的请求对象;
- } catch (tryMS) {
- try {
- request = new ActiveXObject("Msxml2.XMLHTTP");
- } catch (otherMS) {
- try {
- request = new ActiveXObject("Microsoft.XMLHTTP");
- } catch (failed) {
- request = null;
- }
- }
- }
- return request;
- }
- function sech(id) {//省市改变时触发,select的onchange事件
- var aa = document.getElementById(id);
- if(id=="sheng"){
- getCity(aa.value);//这里aa.value为省的id
- }
- if(id=="shi")
- {
- getCounty(aa.value);//这里aa.value为市的id
- }
- }
- function getProvince() {//获取所有省
- request = createRequest();
- if (request == null) {
- alert("Unable to create request");
- return;
- }
- var url= "getDetails.php?ID=0";//ID=0时传递至PHP时让其获取所有省
- request.open("GET", url, true);
- request.onreadystatechange = displayProvince; //设置回调函数
- request.send(null); //发送请求
- }
- function getCity(id){//获取省对应的市
- request = createRequest();
- if (request == null) {
- alert("Unable to create request");
- return;
- }
- var url= "getDetails.php?ID=" + escape(id);
- request.open("GET", url, true);
- request.onreadystatechange = displayCity;
- request.send(null);
- }
- function getCounty(id){//获取市对应的区
- request = createRequest();
- if (request == null) {
- alert("Unable to create request");
- return;
- }
- var url= "getDetails.php?ID=" + escape(id);
- request.open("GET", url, true);
- request.onreadystatechange = displayCounty;
- request.send(null);
- }
- function displayProvince() {//将获取的数据动态增加至select
- if (request.readyState == 4) {
- if (request.status == 200) {
- var a=new Array;
- var b=request.responseText;//将PHP返回的数据赋值给b
- a=b.split(",");//通过","将这一数据保存在数组a中
- document.getElementById("sheng").length=1;
- var obj=document.getElementById("sheng');
- for(i=0;i
- obj.options.add(new Option(a[i],i+1)); //动态生成OPTION加到select中,第一个参数为Text,第二个参数为Value值.
- }
- }
- }
- function displayCity() {//将获取的数据动态增加至select
- if (request.readyState == 4) {
- if (request.status == 200) {
- var a=new Array;
- var b=request.responseText;
- a=b.split(",");
- document.getElementById("shi").length=1;//重新选择
- document.getElementById("xian").length=1;//重新选择
- if(document.getElementById("sheng").value!="province"){
- var obj=document.getElementById('shi');
- for(i=0;i
- obj.options.add(new Option(a[i], document.getElementById("sheng").value*100+i+1)); //ocument.getElementById("sheng").value*100+i+1对应的是市的ID。
- }
- }
- }
- }
- function displayCounty() {//将获取的数据增加至select
- if (request.readyState == 4) {
- if (request.status == 200) {
- var a=new Array;
- var b=request.responseText;
- a=b.split(",");
- document.getElementById("xian").length=1;
- if(document.getElementById("sheng").value!="province"&&document.getElementById("shi").value!="city"){
- var obj=document.getElementById('xian');
- for(i=0;i
- obj.options.add(new Option(a[i],i+1001));
- }
- }
- }
- }
getDetails.php代码:
代码如下:
- <?php
- header("Content-Type: text/html; charset=gb2312");
- $conn = new COM("ADODB.Connection") or die("Cannot start ADO");
- $connstr = "Provider=SQLOLEDB;Persist Security Info=False;User ID=root;Password=123456;Initial Catalog=area;Data Source=localhost";
- if($_REQUEST['ID']==0){//获得省列表
- $conn->Open($connstr); //建立数据库连接
- $sqlstr = "select name from Province"; //设置查询字符串
- $rs = $conn->Execute($sqlstr); //执行查询获得结果
- $num_cols = $rs->Fields->Count(); //得到数据集列数
- $Province=array();
- $i=0;
- while (!$rs->EOF) {
- $Province[$i]=$rs->Fields['name']->Value.",";
- $rs->MoveNext();
- $i++;
- }
- foreach($Province as $val)
- echo $val;
- $conn->Close();
- $rs = null;
- $conn = null;
- }
- if($_REQUEST['ID']>0&&$_REQUEST['ID']<35){//获得省对应的市列表
- $conn->Open($connstr); //建立数据库连接
- $sqlstr = "select name from City where cid=".$_REQUEST['ID']; //设置查询字符串
- $rs = $conn->Execute($sqlstr); //执行查询获得结果
- $num_cols = $rs->Fields->Count(); //得到数据集列数
- $City=array();
- $i=0;
- while (!$rs->EOF) {
- $City[$i]=$rs->Fields['name']->Value.",";
- $rs->MoveNext();
- $i++;
- }
- foreach($City as $val)
- echo $val;
- $conn->Close();
- $rs = null;
- $conn = null;
- }
- if($_REQUEST['ID']>100){//获得省市对应的县列表
- $conn->Open($connstr); //建立数据库连接
- $sqlstr = "select name from County where cid=".$_REQUEST['ID']; //设置查询字符串
- $rs = $conn->Execute($sqlstr); //执行查询获得结果
- $num_cols = $rs->Fields->Count(); //得到数据集列数
- $County=array();
- $i=0;
- while (!$rs->EOF) {
- $County[$i]=$rs->Fields['name']->Value.",";
- $rs->MoveNext();
- $i++;
- }
- foreach($County as $val)
- echo $val;
- $conn->Close();
- $rs = null;
- $conn = null;
- }
- ?>
数据库设计,表格Province表,City表,County表。
要求:Province表需要id和name,id建议从1至34,例如北京id为1,广东id为2,以此类推;
City表需要id,name和cid,id为cid*100+1,cid为该市的上级,例如深圳的上级为广东省,cid为2的话,深圳的id就是201,以此类推。
County表需要id,name和cid,因为是三级的关系,id可以随意,建议从10001开始自增。cid为所在上级,例如宝安区的cid为201,龙岗区的cid也为201;
截图:
HTML效果:
完成后效果:
备注:PHP是服务器端的,建议发布网站后通过ip调试。
以上就是php+Mysql+Ajax+JS实现省市区三级联动实例代码的详细内容,更多请关注Gxl网其它相关文章!