ASP.NET Core:从解决方案中的另一个项目访问应用程序设置 [英] ASP.NET Core: Accessing appsettings from another project in solution

问题描述

在我的Startup.cs类中，我具有以下配置构建，用于初始化数据库上下文:

In my Startup.cs class I have the following config build which initializes the db context:

var builder = new ConfigurationBuilder()
                    .SetBasePath(env.ContentRootPath)
                    .AddJsonFile("appsettings.json", true, true)
                    .AddJsonFile($"appsettings.{env.EnvironmentName}.json",true)
                    .AddEnvironmentVariables();

Configuration = builder.Build();

NHibernateUnitOfWork.Init(Configuration["ConnectionStrings:OracleConnection"]);

NHibernateUnitOfWork与类库项目位于不同的项目中.我希望能够注入(或以某种方式通过设置)，而不是在我的Startup.cs类中使用NHibernateUnitOfWork.Init.

NHibernateUnitOfWork is located in a different project as a class library project. I want to be able to inject (or somehow pass the settings) instead of using the NHibernateUnitOfWork.Init in my Startup.cs class.

我可以在我的类库中构建appsettings，但尝试避免这种情况.

I can build the appsettings in my class library but trying to avoid that.

执行此操作的明智方法是什么?

What is a sane way to do this ?

推荐答案

您可以注入它.

在您的Startup.cs类中，您可以将以下内容添加到您的ConfigureServices(IServiceCollection services)方法中:

In your Startup.cs class, you can add the following to your ConfigureServices(IServiceCollection services) method:

services.AddSingleton(Configuration);

从那里，您可以使用构造函数注入，并像往常一样在下游使用它:

From there, you can use constructor injection and consume it downstream the same way you normally would:

public class SomeClass
{
    public SomeClass(IConfigurationRoot configuration) 
    {
        NHibernateUnitOfWork.Init(Configuration["ConnectionStrings:OracleConnection"]);
    }
}

注意:这假定Configuration是在您的Startup.cs类中定义的:

NOTE: This assumes Configuration is defined in your Startup.cs class:

public static IConfigurationRoot Configuration;

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