.Net core 2 控制台应用设置转换

Question

我正在尝试将 appsettings 转换添加到 .net core 2 控制台应用程序，例如

• appSettings.json
• appSettings.Test.json
• appSettings.Prod.json

我发现以下代码适用于 asp.net core：

public Startup(IHostingEnvironment env)
{
    var builder = new ConfigurationBuilder()
        .SetBasePath(env.ContentRootPath)
        .AddJsonFile("appsettings.json", optional: false, reloadOnChange: 
true)
        .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: 
true)
        .AddEnvironmentVariables();
    Configuration = builder.Build();
}

但是，我不知道如何获取env.EnvironmentName，因为控制台应用程序中没有IHostingEnvironment。

任何帮助将不胜感激

Answer 1

找不到其他东西，所以暂时使用预处理器指令

https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/preprocessor-directives/preprocessor-if

public Startup()
{
    var builder = new ConfigurationBuilder()
        .SetBasePath(env.ContentRootPath)
        .AddJsonFile("appsettings.json", optional: false, reloadOnChange: 
true)

#if RELEASE

        .AddJsonFile($"appsettings.Release.json", optional: 
true)
        .AddEnvironmentVariables();
    Configuration = builder.Build();
}