如何在 Core 2.0 的 ConfigurationBuilder 中设置BasePath

如何在 Core 2.0 的 ConfigurationBuilder 中设置基本路径。

我用谷歌搜索并发现this https://stackoverflow.com/questions/33169589/specify-the-application-base-path-in-configurationbuilder-in-beta8问题，this https://learn.microsoft.com/en-us/aspnet/core/fundamentals/configuration?tabs=basicconfiguration来自 Microsoft 文档，以及2.0 https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.configuration.fileconfigurationextensions.setbasepath?view=aspnetcore-2.0#Microsoft_Extensions_Configuration_FileConfigurationExtensions_SetBasePath_Microsoft_Extensions_Configuration_IConfigurationBuilder_System_String_在线文档，但他们似乎使用的是Microsoft.Extension.Configuration from 1.0.0-beta8 https://github.com/aspnet/Configuration/blob/1.0.0-beta8/src/Microsoft.Framework.Configuration.FileExtensions/FileConfigurationExtensions.cs.

我想读书appsettings.json。 Core 2.0 中有新的方法可以做到这一点吗？

using System;
using System.IO;
using Microsoft.Extensions.Configuration;
namespace ConsoleApp2
{
    class Program
    {
        public static IConfigurationRoot Configuration { get; set; }

        static void Main(string[] args)
        {
            var builder = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory()) // <== compile failing here
                .AddJsonFile("appsettings.json");

            Configuration = builder.Build();

            Console.WriteLine(Configuration.GetConnectionString("con"));
            Console.WriteLine("Press a key...");
            Console.ReadKey();
        }
    }
}

应用程序设置.json

{
  "ConnectionStrings": {
    "con": "connection string"
  }
}

UPDATE:除了添加Microsoft.Extensions.Configuration.FileExtensions https://www.nuget.org/packages/Microsoft.Extensions.Configuration.FileExtensions/如下所示Set https://stackoverflow.com/users/2833802/set我还需要添加Microsoft.Extensions.Configuration.Json https://www.nuget.org/packages/Microsoft.Extensions.Configuration.Json/得到AddJsonFile扩大。

The SetBasePath https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.configuration.fileconfigurationextensions.setbasepath扩展方法定义在配置文件扩展名 https://github.com/aspnet/Configuration/blob/dev/src/Config.FileExtensions/FileConfigurationExtensions.cs#L60.

您需要添加对Microsoft.Extensions.Configuration.FileExtensions https://www.nuget.org/packages/Microsoft.Extensions.Configuration.FileExtensions/包裹。

解决AddJsonFile https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.configuration.jsonconfigurationextensions.addjsonfile，添加对Microsoft.Extensions.Configuration.Json https://www.nuget.org/packages/Microsoft.Extensions.Configuration.Json/包裹。