Dotnet Core 3.1：如何使用具有文件绝对路径的 AddJsonFile？

我有一个 dotnet 应用程序，我需要从两个相对路径（常规路径）中提取配置appsettings.Json, appsettings.Development.json)，并且还可以从绝对路径/config/appsettings.json。我找不到办法做到这一点。从the docs https://learn.microsoft.com/en-us/dotnet/api/microsoft.extensions.configuration.jsonconfigurationextensions.addjsonfile?view=dotnet-plat-ext-3.1，路径arg是Path relative to the base path stored in Properties of builder.如何设置它以从绝对路径读取配置/config/filename.json?

动机： 我正在对 dotnet 应用程序进行 docker 化，因此我计划保留不会出现的配置usually常规部署之间的变化publish/appsettings.json并部署特定配置/config/appsettings.json（这是我将在部署时安装在容器上的卷）。

您可以编辑您的CreateHostBuilder像这样的方法：

public static IHostBuilder CreateHostBuilder(string[] args)
{
    var builder = Host.CreateDefaultBuilder(args);
    builder.ConfigureAppConfiguration(cfgBuilder =>
       {
           var provider = new PhysicalFileProvider("/config"); // Create a dedicated FileProvider based on the /config directory
           cfgBuilder.AddJsonFile(provider, "filename.json", true, true); // Add the filename.json configuration file stored in the /config directory
       });
    builder.ConfigureWebHostDefaults(webBuilder =>
       {
            webBuilder.UseStartup<Startup>();
       });

    return builder;
}