转载:http://www.cnblogs.com/pepcod/archive/2012/07/03/JavaScript.html
//Query获取Select选择的Text和Value: $("#select_id").change(function(){//code...}); //为Select添加事件,当选择其中一项时触发 var checkText=$("#select_id").find("option:selected").text(); //获取Select选择的Text var checkValue=$("#select_id").val(); //获取Select选择的Value var checkIndex=$("#select_id ").get(0).selectedIndex; //获取Select选择的索引值 var maxIndex=$("#select_id option:last").attr("index"); //获取Select最大的索引值 //jQuery设置Select选择的Text和Value: $("#select_id ").get(0).selectedIndex=1; //设置Select索引值为1的项选中 $("#select_id ").val(4); //设置Select的Value值为4的项选中 $("#select_id option[text='jQuery']").attr("selected", true); //设置Select的Text值为jQuery的项选中 //jQuery添加/删除Select的Option项: $("#select_id").append("<option value='Value'>Text</option>"); //为Select追加一个Option(下拉项) $("#select_id").prepend("<option value='0'>请选择</option>"); //为Select插入一个Option(第一个位置) $("#select_id option:last").remove(); //删除Select中索引值最大Option(最后一个) $("#select_id option[index='0']").remove(); //删除Select中索引值为0的Option(第一个) $("#select_id option[value='3']").remove(); //删除Select中Value='3'的Option $("#select_id option[text='4']").remove(); //删除Select中Text='4'的Option
清空option下拉,可以用: $("#" + selecetId).empty();
个人实战案例(实现两个下拉框联动效果):
异步加载,动态修改另一个下拉框的option
function changeBdzDydj(dom, selecetId) { var dydj = $(dom).val(); //alert(dydj); console.log('dydj===' + dydj); var url = __ctx + "/yjbdz/yjbdz/yjbdz/getByDydj.ht"; var params = { dydj : dydj } $.ajax({ url : url, data : params, type : "post", async : true, success : function(rtn) { var dcmcs = rtn.split(","); $("#" + selecetId).empty(); $("#" + selecetId).append("<option value=''>请选择厂站</option>"); for ( var key in dcmcs) { // console.log(dcmcs[key]); var op = dcmcs[key]; if (op) { $("#" + selecetId).append("<option value='"+op+"'>" + op + "</option>"); } } var maxIndex = $("#select_id option:last").attr("index"); //获取Select最大的索引值 if (maxIndex == 1) { $("#" + selecetId).empty(); } }, error : function() { alert("修改失败"); } }); }js
后台段加载数据
/** * @param request * @param response * @return 获取dydj以逗号隔开,拼接成字符串返回 * @throws Exception * String * */ @RequestMapping("getByDydj") @ResponseBody public String getByDydj(HttpServletRequest request, HttpServletResponse response) throws Exception { String res = ""; String dydj = request.getParameter("dydj"); List<Yjbdz> list = yjbdzService.getByDydj(dydj); for (Yjbdz yjbdz : list) { res += yjbdz.getMc() + ","; } if (res.endsWith(",")) { res = res.substring(0, res.length() - 1); } return res; }java
<td><select name="1" class="w100 inputbg" onchange="changeBdzDydj(this,'mySelect0')"> <option>请选择电压等级</option> <c:forEach items="${dydjs }" var="e"> <option value="${e.basename}">${e.basename }</option> </c:forEach> </select></td> <td><select name="1" class="w100 inputbg" id="mySelect0"> <option>请选择厂站</option> </select></td>html两个下拉框
标签:Jquery,option,汇总,select,var,id,Select,dydj From: https://www.cnblogs.com/rdchen/p/17387015.html