数据上下文是否应该是静态的？ [英] Should data contexts be static?

问题描述

我正在使用实体框架4，并且在其中一个基类中为模型创建了一个数据文本。但是我正在分析它，并且每次我尝试查询时都会创建上下文，所以我想到使它成为静态，这样它只创建一次，并且始终被重用。

I am using entity framework 4 and I create an datacontext for model in one of the base classes. But I was in profiling it and the context is being created every time I try to query, So I thought of making it static so that it is created only once and reused always.

你认为这是最好的方法，数据/对象上下文应该永远是静态的？有没有什么缺点使它静止？数据上下文是静态还是非静态？欢迎任何想法或建议。

Do you think this is the best way to do it and data/object context should always be made static? Are there any disadvantages to making it static? Should data contexts be static or non-static? Any ideas or suggestions are welcome.

推荐答案

它们不应该永远是静态的。

No. They should not always be static.

您可以使用静态数据上下文而不是非静态等效项（例如来自单独会话的多个用户）从多个线程访问相同的上下文）。

You can actually run in to many more issues with a Static Data Context rather than the non-static equivalent (like multiple users from separate sessions accessing the same context from multiple threads).

我不会详细的解释，因为有一些非常好的博客文章包括细节：

I'm not going to go into the detailed explanation since there are some very good blog posts out there covering the details:

Linq to SQL DataContext终身管理 - Rick Strahl的Web日志（可能看起来不相关，但仍然是）

Linq to SQL DataContext Lifetime Management - Rick Strahl's Web Log (may not seem relevant, but still is)

使实体框架（v1）工作，第1部分：DataContext终身管理（对于一个可能的选择，如果你不像Rick的解决方案）

Making Entity Framework (v1) work, Part 1: DataContext Lifetime Management (for a possible alternative if you don't like Rick's solution)

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