初始化扩展类 - 设计问题
我的 C# 应用程序遇到设计问题。我有一个 DAL,它为来自不同数据库的多个不同客户提供数据。到目前为止,这些数据库具有相同的表和字段名称,但现在我有一个具有不同字段名称的数据库,因为客户希望字段名称是区域设置语言而不是英语。
我该如何解决这个问题?
我目前的应用架构是基于工厂的。所以我有这个:
BusinessFactory 初始化 DAL,所以我的第一个想法是扩展 DAL,然后重写需要更改数据库字段名称的函数,并在扩展类中创建一个新函数。但是我什么时候应该初始化这个扩展类呢?
我无法从我的 BusinessFactory 中执行此操作,因为 DAL 依赖于接口。
如果我关于扩展 DAL 作为此问题的解决方案的说法完全错误,请也给我指出另一个方向。
I'm running into a design problem in my C# application. I have a DAL which supplies data for several different customers from different databases. Until now these databases have had the same tables and field names, but now i have one database which has different field names, because the customer wants the field names to be of locale language instead of english.
How do i solve this?
My current application achitecture is based on factories. So i have this:
BusinessFactory
initialzes the DAL, so my first thought was to just extend the DAL and then override the function where the database field names needs to be changed and make a new function in the extending class. But when should i initialize this extending class?
I can't do it from my BusinessFactory
because the DAL is depending on a Interface.
Please, also point me the other direction if I'm all wrong about extending the DAL as a solution to this problem.
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我想你一定有一个客户 ->数据库映射到位,您可以根据该映射决定要连接到哪个数据库。
因此,您可以引入预处理器层来找出需要从数据库获取的列名称。因此基本上您将保留可以使用的每个客户端配置(和默认配置)。
I think you must be having a client -> db mapping in place based on which you decide that which db to connect to.
So you can introduce a pre processor layer to figure out the column names you need to get from database. So basically you will keep a per client config (and a default config) which you can use.
简单的解决方案是使用客户希望的语言创建具有列名称的视图。这样您就不必更改您的应用程序。
Simple solution would be to create Views with column names in the language your client wishes. This way you do not have to change your application.