Asp.net core: How to use appSettings for a particular environment-CodePudding

In .NET 6.0 WebApi application

I have the following two files: appSettings.json appSettings.Linux.json

I want the application to use appSettings.Linux.json when running in linux environment. The following is the code that I have tried so far but unfortunately it is not working. It is still accessing appSettings.json file while running in linux environment.

    if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
    {
        IConfigurationBuilder builder = new ConfigurationBuilder()
                                            .AddJsonFile("appSettings.Linux.json" , optional: true, reloadOnChange: true);
        builder.Build();
    }

I am adding a new builder as follows

CodePudding user response：

in .NET 6, you can do like this.

if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
    builder.Environment.EnvironmentName = "Linux";
    builder.Configuration.AddJsonFile("appSettings.Linux.json");
}

and then it will override all the configuration values.

appsettings.Linux.json

accessing value from Configuration

Updated answer based on feedback.

public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration(config =>
                {
                    if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
                    {
                        config.AddJsonFile("appSettings.Linux.json", optional: true, reloadOnChange: true);
                    }
                })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });