public string SaveSchool(string jsonString, string action)
        {
            try
            {
                SchoolInfoEntity  entity  = JsonConvert.DeserializeObject <SchoolInfoEntity>(jsonString);
                SchoolInfoManager manager = new SchoolInfoManager();
                if (action == "add")
                {
                    manager.Insert(entity);
                }
                else
                {
                    SchoolInfoEntity oldEntity = manager.GetSchoolInfoByCode(entity.Code);
                    oldEntity.Name        = entity.Name;
                    oldEntity.Address     = entity.Address;
                    oldEntity.Description = entity.Description;

                    oldEntity.UpdateBy = SessionHelper.CurrentUser.Code;

                    manager.Update(oldEntity);
                }
                return("success");
            }
            catch (Exception e)
            {
                return(e.ToString());
            }
        }
        public string PutSchoolInfo(SchoolInfoEntity entity)
        {
            try
            {
                if (entity == null)
                {
                    return("error");
                }

                SchoolInfoManager manager = new SchoolInfoManager();

                entity.CreateTime = DateTime.Now;
                entity.CreateTime = DateTime.Now;

                manager.Update(entity);

                return("success");
            }
            catch (Exception e)
            {
                return(e.ToString());
            }
        }
        public string DeleteSchoolInfo(int id)
        {
            try
            {
                SchoolInfoManager manager = new SchoolInfoManager();

                SchoolInfoEntity entity = manager.GetSchoolInfoByID(id);
                if (entity != null)
                {
                    entity.Valid      = "F";
                    entity.CreateTime = DateTime.Now;
                    entity.CreateTime = DateTime.Now;

                    manager.Update(entity);
                }

                return("success");
            }
            catch (Exception e)
            {
                return(e.ToString());
            }
        }