English 中文(简体)
您如何使用实体框架处理查找表/数据?
原标题:How are you handle lookup tables / data with the entity framework?

今天,我创建了代理实体来从内存中加载查找数据。

我建议,实体框架应该足够聪明,不要生成国家/地区表的连接

DbContext.Users.Include(u => u.Country.Select(c => c.Place))

相反,EF应该从内存中获取数据。

你如何使用实体框架处理查找数据?

问题回答

所以,您希望EF在访问之前急于将所有查找表加载到内存中吗?这听起来有点凌乱和笨拙。(如果查找有更新怎么办?如何同步?)如果使用Pks,加入查找表会很快。如果需要在内存中加载查找表,仍然需要在linq查询中连接保存表数据的代理对象。我没有确凿的数据,但我看不出这两种技术在性能上有多大差异。如果有的话,Linq的例子可能会慢一些。

我的经验法则是:如果两种技术在速度和回报方面相似,那就选择一种不那么复杂、更容易维护的技术(在你的例子中,使用Include())。





相关问题
Manually implementing high performance algorithms in .NET

As a learning experience I recently tried implementing Quicksort with 3 way partitioning in C#. Apart from needing to add an extra range check on the left/right variables before the recursive call, ...

Anyone feel like passing it forward?

I m the only developer in my company, and am getting along well as an autodidact, but I know I m missing out on the education one gets from working with and having code reviewed by more senior devs. ...

How do I compare two decimals to 10 decimal places?

I m using decimal type (.net), and I want to see if two numbers are equal. But I only want to be accurate to 10 decimal places. For example take these three numbers. I want them all to be equal. 0....

Exception practices when creating a SynchronizationContext?

I m creating an STA version of the SynchronizationContext for use in Windows Workflow 4.0. I m wondering what to do about exceptions when Post-ing callbacks. The SynchronizationContext can be used ...

Show running instance in single instance application

I am building an application with C#. I managed to turn this into a single instance application by checking if the same process is already running. Process[] pname = Process.GetProcessesByName("...

How to combine DataTrigger and EventTrigger?

NOTE I have asked the related question (with an accepted answer): How to combine DataTrigger and Trigger? I think I need to combine an EventTrigger and a DataTrigger to achieve what I m after: when ...

热门标签