二级联动下拉列表菜单的难点在于对后台返回的数据进行解析,不多逼逼,直接上代码
上图是后台返回的数据
实现代码如下:
var deviceNotExist = true;//防止数据重复
if(data.code == 0) { //查询成功 var param = data.content; for(i = 0; i < param.length; i++) { deviceNotExist = true; var detTim = []; for(j in dev) { if(param[i].sbbh == dev[j].sbbh) { deviceNotExist = false; var period = { kssj: param[i].kssj, jssj: param[i].jssj } tim[j].push(period); break; } } if(deviceNotExist) { var deviceInfo = { sbbh: param[i].sbbh, sbmc: param[i].sbmc } dev.push(deviceInfo); var period = { kssj: param[i].kssj, jssj: param[i].jssj } detTim.push(period); tim.push(detTim); } } mulArr.push(dev); mulArr.push(tim); for(var i = 0; i < mulArr[0].length; i++) { $("#device").append("<option value=" + mulArr[0][i].sbbh + ">" + mulArr[0][i].sbmc + "</option>"); } for(var i = 0; i < mulArr[1][0].length; i++) { $("#period").append("<option value=startTime=" + mulArr[1][0][i].kssj + "&endTime=" + mulArr[1][0][i].jssj + ">" + mulArr[1][0][i].kssj + "-" + mulArr[1][0][i].jssj + "</option>"); }
//选择下拉框列表内容时下面的列表实现联动 $("#device").change(function() { $("#period").html("");//改变列表值时先清空下面列表的内容 var dIndex = $("#device option:selected").index();//获取当前选中列表的下标 for(var i = 0; i < mulArr[1][dIndex].length; i++) { $("#period").append("<option value=startTime=" + mulArr[1][dIndex][i].kssj + "&endTime=" + mulArr[1][dIndex][i].jssj + ">" + mulArr[1][dIndex][i].kssj + "-" + mulArr[1][dIndex][i].jssj + "</option>"); } })