ASP.NET Core: Load configuration subsection

ASP.NET Core has a lot of configuration options out of the box. One of the added possibilities is to store your configuration settings inside a JSON document.

Nice advantage of using a JSON document is that you can logically group the related configuration settings in separate sections inside your document:

	{
	"Logging": {
	"IncludeScopes": false,
	"LogLevel": {
	"Default": "Debug",
	"System": "Information",
	"Microsoft": "Information"
	}
	}
	"Data":{
	"ConnectionString":"<connection info>"
	}
	}

view raw appsettings.json hosted with ❤ by GitHub

To read values from a subsection, you specify the subsection name and the property name separated by a colon:

	public class Startup
	{
	public Startup(IHostingEnvironment env)
	{
	var builder = new ConfigurationBuilder()
	.SetBasePath(env.ContentRootPath)
	.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
	.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true, reloadOnChange: true)
	.AddEnvironmentVariables();
	Configuration = builder.Build();
	}
	public IConfigurationRoot Configuration { get; }
	// This method gets called by the runtime. Use this method to add services to the container.
	public void ConfigureServices(IServiceCollection services)
	{
	var connectionString=Configuration["Data:ConnectionString"];
	}
	/*Removed other code*/
	}

view raw Startup.cs hosted with ❤ by GitHub