EF 5.0&安培;动态连接字符串？ [英] EF 5.0 & dynamic connection string?

问题描述

有一件事情是让我疯了现在。

One thing is driving me crazy right now.

我（数据库一）EF-模型需要一个动态连接字符串（服务器的IP-ADRESS可能会换一次在一段时间）。

My (Database-first) EF-Model needs a dynamic connection string (IP-Adress of Server might change once in a while).

因此，在旧的EF-版本，你可以通过通过构造一个连接字符串，但那是不可能的5.0原样似乎

So in older EF-Versions you could pass a connection-string via constructor, but that is not possible in 5.0 as is seems.

我读过到目前为止，你可以改变你的DataTemplate，但会在您每次都会覆盖重新生成模型等，所以不能做到这一点的最好办法。

What I have read so far, you could change your datatemplate, but that will be overwritten each time you re-generate your model etc., so not the best way to do it.

另一件事是SQLConnectionFactory，但似乎并没有在所有
（Database.DefaultConnectionFactory =新SqlConnectionFactory（工作.. 。）似乎被完全忽略）。

Another thing is the SQLConnectionFactory, but that does not seem to work at all (Database.DefaultConnectionFactory = new SqlConnectionFactory( ... ) seems to be ignored completely).

什么是对，正确的方法呢？

What would be the right approach for that?

推荐答案

随着石油中提到，您可以创建你想要的构造部分类

As petro mentions, you could create a partial class with the constructor you want.

例如：

public partial class MyContext : DbContext
{
    public MyContext(string connectionString) : base(connectionString) {}
}

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