// JObject here is very very important...
        public ActionResult <string> Post2([FromBody] JObject entityObj)
        {
            //声明要插入的对象
            ABD_DOUBLE_SEAL_MST postedEntity = entityObj.ToObject <ABD_DOUBLE_SEAL_MST>();
            //获取表格中已有的数据
            var orderListEntity = myContext.ABD_DOUBLE_SEAL_MST.Where(d => d.ID.ToString() != null);

            if (!String.IsNullOrEmpty(postedEntity.ID.ToString()))              //修改已有数据
            {
                orderListEntity = orderListEntity.Where(d => d.ID.Equals(postedEntity.ID));
            }

            if (orderListEntity.Count() == 0)             //如果表中没有任何数据,则插入新数据
            {
                // INSERT
                myContext.ABD_DOUBLE_SEAL_MST.Add(postedEntity);
                myContext.SaveChanges();
                return("");
            }
            else              //如果表中有数据,则插入新数据
            {
                orderListEntity.First().MEDIUM_END_MOVABLE_RING      = postedEntity.MEDIUM_END_MOVABLE_RING;
                orderListEntity.First().MEDIUM_END_STATIC_RING       = postedEntity.MEDIUM_END_STATIC_RING;
                orderListEntity.First().ATMOSPHERIC_END_MOVABLE_RING = postedEntity.ATMOSPHERIC_END_MOVABLE_RING;
                orderListEntity.First().ATMOSPHERIC_END_STATIC_RING  = postedEntity.ATMOSPHERIC_END_STATIC_RING;
                orderListEntity.First().SPRING      = postedEntity.SPRING;
                orderListEntity.First().METAL_BASE  = postedEntity.METAL_BASE;
                orderListEntity.First().O_TYPE_RING = postedEntity.O_TYPE_RING;
                myContext.SaveChanges();
                return("");
            }
        }
        public ActionResult <string> Delete(string ID)
        {
            Boolean isSuccess = true;
            string  data      = "Delete success";

            if (!String.IsNullOrEmpty(ID))
            {
                String[] ID_LIST = ID.Split(",");

                foreach (string RESULTS_ITEM in ID_LIST)
                {
                    ABD_DOUBLE_SEAL_MST delMstEntity = new ABD_DOUBLE_SEAL_MST()
                    {
                        ID = Convert.ToInt32(RESULTS_ITEM)
                    };
                    if (delMstEntity.Equals(null))
                    {
                        isSuccess = false;
                        data      = "No such data.";
                        break;
                    }
                    else
                    {
                        // FIND DB ITEM
                        myContext.ABD_DOUBLE_SEAL_MST.Attach(delMstEntity);
                        // DELETE DB ITEM
                        var delRes = myContext.ABD_DOUBLE_SEAL_MST.Remove(delMstEntity);
                        if (delRes.State == EntityState.Deleted)
                        {
                            // SAVE CHANGES AND DO NOT RETURN
                            myContext.SaveChanges();
                        }
                        else
                        {
                            isSuccess = false;
                            data      = "No such data.";
                            break;
                        }
                    }
                }
            }
            else
            {
                isSuccess = false;
                data      = "No such data.";
            }
            JsonRes res = new JsonRes();

            res.isSuccess = isSuccess;
            res.data      = data;
            return(JsonConvert.SerializeObject(res));
        }