更新部分字段 NHibernate

  public   static   bool  UpdateIsBrowse( decimal  id)
        {
             bool  IsSuccess  =   false ;

            ITransaction trans  =  session.BeginTransaction();
             try
            {
                 // 2 修改记录
                 string  sql  =   "  update jkpt_oaxt_weatherforecast set Isbrowse=1 where Weatherforecastid= "   +  id;           

                ISQLQuery Query  =  session.CreateSQLQuery(sql).AddEntity( typeof (JkptOaxtWeatherforecast));
                Query.ExecuteUpdate();             
                session.Flush();
                trans.Commit();
                 // 写日志
                Helpers.SaveInfo( " Update weatherforecast 's isbrowse Success! " );
                IsSuccess  =   true ;
            }
             catch  (Exception ex)
            {
                IsSuccess  =   false ;
                trans.Rollback();
                 // 写日志
                Helpers.SaveInfo( " 更新是否浏览失败！错误提示如下： "   +  ex.Message);
            }
             finally
            {
                 if  (session  !=   null )
                {
                    session.Clear();
                }
            }
             return  IsSuccess;
        }