/// <summary> /// 删除数据 /// </summary> /// <param name="paraTb_Area"></param> /// <returns>true:删除成功,false:不存在该记录</returns> public bool deleteMode(tb_Area paraTb_Area) { if(paraTb_Area == null) throw new ArgumentNullException("paraTb_Area"); try { var query = from p in _context.tb_Area where p.AreaId == paraTb_Area.AreaId select p; if (query.ToList().Count<1) { return false; } else { foreach(var model in query.ToList()) { if(!_context.IsAttached(model)) _context.tb_Area.Attach(model); _context.tb_Area.DeleteObject(model); _context.SaveChanges(); } return true; } } catch (Exception ex) { throw ex; } }
/// <summary> /// 插入数据 /// </summary> /// <param name="paraTb_Area"></param> /// <returns>true:插入成功,false:已存在该记录</returns> public bool addMode(tb_Area paraTb_Area) { if(paraTb_Area == null) throw new ArgumentNullException("paraTb_Area"); try { var query = from p in _context.tb_Area where p.AreaId == paraTb_Area.AreaId select p; if (query.ToList().Count() > 0) { return false; } else { _context.tb_Area.AddObject(paraTb_Area); _context.SaveChanges(); return true; } } catch (Exception ex) { throw ex; } }
/// <summary> /// 创建新的 tb_Area 对象。 /// </summary> /// <param name="areaId">AreaId 属性的初始值。</param> public static tb_Area Createtb_Area(global::System.String areaId) { tb_Area tb_Area = new tb_Area(); tb_Area.AreaId = areaId; return tb_Area; }
/// <summary> /// 更新数据 /// </summary> /// <param name="paraTb_Area"></param> /// <returns>true:更新成功,false:更新数据失败,不存在该记录!</returns> public bool updateMode(tb_Area paraTb_Area) { if(paraTb_Area == null) throw new ArgumentNullException("paraTb_Area"); try { var oldEntity = (from p in _context.tb_Area where p.AreaId == paraTb_Area.AreaId select p).FirstOrDefault(); if (oldEntity == null) { return false; } else { _context.ApplyCurrentValues(oldEntity.GetType().Name, paraTb_Area); _context.SaveChanges(); return true; } } catch (Exception ex) { throw ex; } }
/// <summary> /// 用于向 tb_Area EntitySet 添加新对象的方法,已弃用。请考虑改用关联的 ObjectSet<T> 属性的 .Add 方法。 /// </summary> public void AddTotb_Area(tb_Area tb_Area) { base.AddObject("tb_Area", tb_Area); }