csharp 在Program.cs中设置appsettings

Posted 2021-05-11

public static IWebHostBuilder CreateWebHostBuilder(string[] args)
    {
        var webHostBuilder = WebHost.CreateDefaultBuilder(args)
            .ConfigureAppConfiguration((builderContext, config) =>
            {
                config.AddJsonFile($"appsettings.{Environment.MachineName}.json", optional: true,
                    reloadOnChange: true);
            })
            .UseStartup<Startup>();

        if (args.Length == 1 && long.TryParse(args[0], out var portNumber))
            webHostBuilder = webHostBuilder.UseUrls($"http://localhost:{portNumber}/");

        return webHostBuilder;
    }