如何取到List类型的返回值data中某一列的值？

```onChange: function (newValue, oldValue) {
                            $.ajax({
                                type: 'post',
                                url: "/DMS/ProductionData/GetListByEquTy",
                                data: { newValue: newValue },
                                async: false,
                                success: function (data) {

                                                                                //该如何取值
                                }

                            });





```        public List<DMS_EquStopTypeModel> GetListByEquTy(string newValue)
        {
            List<DMS_EquStopTypeModel> list = new List<DMS_EquStopTypeModel>();
            MyCommonHelp mycommonHelp = new MyCommonHelp();
            StringBuilder sql = new StringBuilder();
            sql.AppendFormat(@"select Id,EquStop_Desc from DMS_EquStop
            where EquStop_Type = '{0}'", newValue);

            DataTable dt = DBHelp.GetDataTable(sql.ToString());

            list = mycommonHelp.ConvertToList<DMS_EquStopTypeModel>(dt);
            return list;

        }

$.each(data, function (i, item) {
var id=item.Id;
var desc=item.EquStop_Desc
}
);
这样试试
补充
后台方法改成

 public  ActionResult GetListByEquTy(string newValue)
        {
            List<DMS_EquStopTypeModel> list = new List<DMS_EquStopTypeModel>();
            MyCommonHelp mycommonHelp = new MyCommonHelp();
            StringBuilder sql = new StringBuilder();
            sql.AppendFormat(@"select Id,EquStop_Desc from DMS_EquStop
            where EquStop_Type = '{0}'", newValue);

            DataTable dt = DBHelp.GetDataTable(sql.ToString());

            list = mycommonHelp.ConvertToList<DMS_EquStopTypeModel>(dt);
            return Json(list, JsonRequestBehavior.AllowGet);

        }

首先后台返回的list要转成json的格式 ， 前台直接for循环 data就行 然后第一行就是 date[0].列名 就可以了

Map<String, Object> dataMap = new HashMap<String, Object>();

dataMap.put("returnObj", list);//与前台交互的数据集

String jsonString = JSONObject.toJSONString(dataMap);//转化为json格式的字符串

HttpServletResponse response = getResponse();
response.setContentType("text/html;charset=UTF-8");
response.setCharacterEncoding("UTF-8");
try {
        response.getWriter().print(jsonString);
    } catch (IOException e) {
        e.printStackTrace();
    }

//前台通过data.returnObj取得数据集

//例如你想取得第一个对象中的某一个属性

//eg：data.returnObj[0].属性名

以上仅为个人观点，有疏忽的地方，望指正，谢谢。