在 beta8 中的 ConfigurationBuilder 中指定应用程序基路径

问题描述

我曾经像这样为 ConfigurationBuilder 指定应用程序基本路径:

public Startup(IApplicationEnvironment appEnv){var configurationBuilder = new ConfigurationBuilder(appEnv.ApplicationBasePath).AddJsonFile("config.json").AddEnvironmentVariables();配置 = configurationBuilder.Build();}

但是，从 beta8 开始，ConfigurationBuilder 的构造函数不再接受应用程序基本路径参数，并且现在抛出异常.

如何指定基本路径?

解决方案

如果我们看一下 ConfigurationBuilder的源代码，我们可以看到构造函数不再接受代表应用程序基路径的字符串.相反，我们必须使用 IConfigurationBuilder 接口上的 >SetBasePath() 扩展方法 来指定它:

public Startup(IApplicationEnvironment appEnv){var configurationBuilder = new ConfigurationBuilder().SetBasePath(appEnv.ApplicationBasePath).AddJsonFile("config.json").AddEnvironmentVariables();配置 = configurationBuilder.Build();}

可以找到特定的提交">

I used to specify the application base path for the ConfigurationBuilder like this:

public Startup(IApplicationEnvironment appEnv)
{
    var configurationBuilder = new ConfigurationBuilder(appEnv.ApplicationBasePath)
        .AddJsonFile("config.json")
        .AddEnvironmentVariables();

    Configuration = configurationBuilder.Build();
}

However, as of beta8, the constructor of ConfigurationBuilder does not take an application base path argument anymore and it throws an exception now.

How can I specify the base path?

解决方案

If we look at the source code of ConfigurationBuilder, we can see that the constructor no longer accepts a string representing the application base path. In stead, we have to use the SetBasePath() extension method on the IConfigurationBuilder interface to specify it:

public Startup(IApplicationEnvironment appEnv)
{
    var configurationBuilder = new ConfigurationBuilder()
        .SetBasePath(appEnv.ApplicationBasePath)
        .AddJsonFile("config.json")
        .AddEnvironmentVariables();

    Configuration = configurationBuilder.Build();
}

The particular commit can be found here.

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