从.net标准库读取appsettings.json [英] Reading appsettings.json from .net standard library

问题描述

我已经使用.NET Core Framework开始了一个新的RESTful项目。

i have started a new RESTful project using .NET Core Framework.

我将解决方案分为两部分：框架（.NET标准库集）和Web （RESTful项目）。

I divided my solution in two parts: Framework (set of .NET standard libraries) and Web (RESTful project).

借助Framework文件夹，我为进一步的Web项目提供了一些库，在其中一个库中，我想为Configuration类提供通用方法 T GetAppSetting< T>（字符串键） 。

With Framework folder i provide some of library for furthers web project and into one of these i'd like to provide a Configuration class with the generic method T GetAppSetting<T>(string Key).

我的问题是：如何我可以访问.NET Standard中的AppSettings.json文件吗？

My question is: how can i get the access to the AppSettings.json file in .NET Standard?

我找到了很多有关读取此文件的示例，但是所有这些示例都将文件读入了该网络项目，没有人将其放入外部图书馆。我需要它具有其他项目的可重用代码。

I have found so many example about reading this file, but all these examples read the file into the web project and no-one do this into an extarnal library. I need it to have reusable code for Others project.

推荐答案

正如评论中已经提到的那样，您真的不应该这样做。 注入已配置的 IOptions< MyOptions> 而是使用依赖项注入。

As already mentioned in the comments, you really shouldn't do it. Inject a configured IOptions<MyOptions> using dependency injection instead.

但是，您仍然可以加载json文件作为配置：

However, you can still load a json file as configuration:

IConfiguration configuration = new ConfigurationBuilder()
    .SetBasePath(Directory.GetCurrentDirectory()) // Directory where the json files are located
    .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
    .Build();

// Use configuration as in every web project
var myOptions = configuration.GetSection("MyOptions").Get<MyOptions>();

确保引用 Microsoft.Extensions.Configuration 和 Microsoft.Extensions.Configuration.Json 软件包。有关更多配置选项，请请参阅文档。

Make sure to reference the Microsoft.Extensions.Configuration and Microsoft.Extensions.Configuration.Json packages. For more configuration options see the documentation.

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