.net core read appsettings code example
Example: .net core read appsettings.json console app
class Program
{
public static IConfigurationRoot configuration;
static int Main(string[] args)
{
Log.Logger = new LoggerConfiguration()
.WriteTo.Console(Serilog.Events.LogEventLevel.Debug)
.MinimumLevel.Debug()
.Enrich.FromLogContext()
.CreateLogger();
try
{
MainAsync(args).Wait();
return 0;
}
catch
{
return 1;
}
}
static async Task MainAsync(string[] args)
{
Log.Information("Creating service collection");
ServiceCollection serviceCollection = new ServiceCollection();
ConfigureServices(serviceCollection);
Log.Information("Building service provider");
IServiceProvider serviceProvider = serviceCollection.BuildServiceProvider();
Console.WriteLine(configuration.GetConnectionString("DataConnection"));
try
{
Log.Information("Starting service");
await serviceProvider.GetService<App>().Run();
Log.Information("Ending service");
}
catch (Exception ex)
{
Log.Fatal(ex, "Error running service");
throw ex;
}
finally
{
Log.CloseAndFlush();
}
}
private static void ConfigureServices(IServiceCollection serviceCollection)
{
serviceCollection.AddSingleton(LoggerFactory.Create(builder =>
{
builder
.AddSerilog(dispose: true);
}));
serviceCollection.AddLogging();
configuration = new ConfigurationBuilder()
.SetBasePath(Directory.GetParent(AppContext.BaseDirectory).FullName)
.AddJsonFile("appsettings.json", false)
.Build();
serviceCollection.AddSingleton<IConfigurationRoot>(configuration);
serviceCollection.AddTransient<App>();
}
}