最近接觸layui,比較簡潔美觀的一款ui,但也有很多小坑,記錄一下實作省市區下拉三級關聯更新回顯的問題
<%--監聽省份選擇 --%>
form.on('select(uprovinceId)', function(data){
initCityList('change');
});
這裡面有個問題就是 選擇的時候 如果 請選擇 的value 是“” 空字元串,當選擇從河北省變到請選擇時不會觸發這個監聽事件
<script type="text/javaScript">
layui.use(['form'],function(){
var form = layui.form;
<%--監聽省份選擇 --%>
form.on('select(uprovinceId)', function(data){
initCityList('change');
});
<%--監聽城市選擇 --%>
form.on('select(ucityId)', function(data){
initDistrictList('change');
});
<%--監聽修改送出 --%>
form.on('submit(update)', function(data){
updateAccount();
form.render();
return false; //阻止表單跳轉。如果需要表單跳轉,去掉這段即可。
});
});
<%-- 監聽取消按鈕 --%>
$(document).on("click",".cancel",function(){
layer.closeAll("page");
});
$(function(){
<%--初始化省份清單 --%>
initProvinceList('init');
initCityList('init');
initDistrictList('init');
});
<%--初始化省份清單 --%>
function initProvinceList(flag){
var provinceId = $("#oldProvinceId").val();
$("#uprovinceId").append("<option value='" + -1 +"'>" + '請選擇' + "</option>");
$("#udistrictId").append("<option value='" + -1 + "'>" + '請選擇' + "</option>");
$("#ucityId").append("<option value='" + -1 + "'>" + '請選擇' + "</option>");
var url = "${ctx}/admin/getProvinceList.action?ranNum="+Math.random();
$.post(url,{},function(data){
var list = eval(data);
for (i = 0; i < list.length; i++) {
var name = list[i].province;
var id = list[i].id;
if(id == provinceId){
$("#uprovinceId").append("<option value='" + id + "' selected>" + name + "</option>");
}else{
$("#uprovinceId").append("<option value='" + id + "'>" + name + "</option>");
}
}
layui.use(['form'],function(){
var form = layui.form;
form.render();
});
});
}
<%--初始化城市清單 --%>
function initCityList(flag){
var provinceId = $("#uprovinceId").val();
var oldProvinceId = $("#oldProvinceId").val();
if(provinceId == -1 && flag == "init"){
provinceId = oldProvinceId;
}
var cityId = $("#oldCityId").val();
$("#ucityId").empty();
$("#ucityId").append("<option value='" + -1 + "'>" + '請選擇' + "</option>");
$("#udistrictId").empty();
$("#udistrictId").append("<option value='" + -1 + "'>" + '請選擇' + "</option>");
var url = "${ctx}/admin/getCityList.action?ranNum="+Math.random();
$.post(url,{provinceId:provinceId},function(data){
var list = eval(data);
alert(list.length+"list長度");
for (i = 0; i < list.length; i++) {
var name = list[i].city;
var id = list[i].id;
if(id == cityId){
$("#ucityId").append("<option value='" + id + "' selected>" + name + "</option>");
}else{
$("#ucityId").append("<option value='" + id + "'>" + name + "</option>");
}
}
layui.use(['form'],function(){
var form = layui.form;
form.render();
});
});
}
<%--初始化區清單 --%>
function initDistrictList(flag){
var cityId = $("#ucityId").val();
var oldCityId = $("#oldCityId").val();
if(cityId == -1 && flag == "init"){
cityId = oldCityId;
}
var districtId = $("#oldDistrictId").val();
$("#udistrictId").empty();
$("#udistrictId").append("<option value='" + -1 + "'>" + '請選擇' + "</option>");
var url = "${ctx}/admin/getDistrictList.action?ranNum="+Math.random();
$.post(url,{cityId:cityId},function(data){
var list = eval(data);
for (i = 0; i < list.length; i++) {
var name = list[i].district;
var id = list[i].id;
if( id == districtId){
$("#udistrictId").append("<option value='" + id + "' selected>" + name + "</option>");
}else{
$("#udistrictId").append("<option value='" + id + "'>" + name + "</option>");
}
}
layui.use(['form'],function(){
var form = layui.form;
form.render();
});
});
}
</script>
<div class="layui-form-item city" style="margin-bottom: -8px;">
<label class="layui-form-label">所負責區域</label>
<div class="layui-inline">
<div class="layui-input-inline" style="width: 90px;margin-right: 0px;margin-bottom: 0px;">
<select id="uprovinceId" name="provinceId" lay-verify="required" lay-search="" lay-filter="uprovinceId">
<!-- <option value="-1">請選擇</option> -->
</select>
</div>
</div>
<div class="layui-inline">
<div class="layui-input-inline" style="width: 90px;margin-right: 0px;margin-bottom: 0px;">
<select id="ucityId" name="cityId" lay-verify="required" lay-search="" lay-filter="ucityId" οnchange="initDistrictList()">
<!-- <option value="-1">請選擇</option> -->
</select>
</div>
</div>
<div class="layui-inline">
<div class="layui-input-inline" style="width: 90px;margin-right: 0px;margin-bottom: 0px;">
<select id="udistrictId" name="districtId" lay-verify="required" lay-search="">
<!-- <option value="-1">請選擇</option> -->
</select>
</div>
</div>
</div>
<input type = "hidden" value="${admin.provinceId }" id="oldProvinceId">
<input type = "hidden" value="${admin.cityId }" id="oldCityId">
<input type = "hidden" value="${admin.districtId }" id="oldDistrictId">