解决layui 三级联动下拉框更新时回显的问题
最近接触layui,比较简洁美观的一款ui,但也有很多小坑,记录一下实现省市区下拉三级联动更新回显的问题
<%--监听省份选择 --%> form.on('select(uprovinceId)', function(data){ initCityList('change'); });
这里面有个问题就是 选择的时候 如果 请选择 的value 是“” 空字符串,当选择从河北省变到请选择时不会触发这个监听事件
<script type="text/javaScript"> layui.use(['form'],function(){ var form = layui.form; <%--监听省份选择 --%> form.on('select(uprovinceId)', function(data){ initCityList('change'); }); <%--监听城市选择 --%> form.on('select(ucityId)', function(data){ initDistrictList('change'); }); <%--监听修改提交 --%> form.on('submit(update)', function(data){ updateAccount(); form.render(); return false; //阻止表单跳转。如果需要表单跳转,去掉这段即可。 }); }); <%-- 监听取消按钮 --%> $(document).on("click",".cancel",function(){ layer.closeAll("page"); }); $(function(){ <%--初始化省份列表 --%> initProvinceList('init'); initCityList('init'); initDistrictList('init'); }); <%--初始化省份列表 --%> function initProvinceList(flag){ var provinceId = $("#oldProvinceId").val(); $("#uprovinceId").append("<option value='" + -1 +"'>" + '请选择' + "</option>"); $("#udistrictId").append("<option value='" + -1 + "'>" + '请选择' + "</option>"); $("#ucityId").append("<option value='" + -1 + "'>" + '请选择' + "</option>"); var url = "${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(); }); }); } <%--初始化城市列表 --%> 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 + "'>" + '请选择' + "</option>"); $("#udistrictId").empty(); $("#udistrictId").append("<option value='" + -1 + "'>" + '请选择' + "</option>"); var url = "${ctx}/admin/getCityList.action?ranNum="+Math.random(); $.post(url,{provinceId:provinceId},function(data){ var list = eval(data); alert(list.length+"list长度"); 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(); }); }); } <%--初始化区列表 --%> function initDistrictList(flag){ var cityId = $("#ucityId").val(); var oldCityId = $("#oldCityId").val(); if(cityId == -1 && flag == "init"){ cityId = oldCityId; } var districtId = $("#oldDistrictId").val(); $("#udistrictId").empty(); $("#udistrictId").append("<option value='" + -1 + "'>" + '请选择' + "</option>"); var url = "${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{ $("#udistrictId").append("<option value='" + id + "'>" + name + "</option>"); } } layui.use(['form'],function(){ var form = layui.form; form.render(); }); }); } </script> <div class="layui-form-item city" style="margin-bottom: -8px;"> <label class="layui-form-label">所负责区域</label> <div class="layui-inline"> <div class="layui-input-inline" style="width: 90px;margin-right: 0px;margin-bottom: 0px;"> <select id="uprovinceId" name="provinceId" lay-verify="required" lay-search="" lay-filter="uprovinceId"> <!-- <option value="-1">请选择</option> --> </select> </div> </div> <div class="layui-inline"> <div class="layui-input-inline" style="width: 90px;margin-right: 0px;margin-bottom: 0px;"> <select id="ucityId" name="cityId" lay-verify="required" lay-search="" lay-filter="ucityId" οnchange="initDistrictList()"> <!-- <option value="-1">请选择</option> --> </select> </div> </div> <div class="layui-inline"> <div class="layui-input-inline" style="width: 90px;margin-right: 0px;margin-bottom: 0px;"> <select id="udistrictId" name="districtId" lay-verify="required" lay-search=""> <!-- <option value="-1">请选择</option> --> </select> </div> </div> </div> <input type = "hidden" value="${admin.provinceId }" id="oldProvinceId"> <input type = "hidden" value="${admin.cityId }" id="oldCityId"> <input type = "hidden" value="${admin.districtId }" id="oldDistrictId">
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