/// <summary> /// 更新指定字段 /// </summary> /// <param name="item">实体对象</param> /// <param name="paramField">字段</param> public void UpdateField(TEntity item, params string[] paramField) { using (DBContext <TEntity> context = new DBContext <TEntity>()) { try { ObjectContext dbcontext = ((IObjectContextAdapter)context).ObjectContext; context.Set <TEntity>().Attach(item); ObjectStateEntry stateEntry = dbcontext.ObjectStateManager.GetObjectStateEntry(item); foreach (string field in paramField) { stateEntry.SetModifiedProperty(field); } stateEntry.SetModified(); dbcontext.SaveChanges(); } catch (DbEntityValidationException ex) { throw ex; } } }