Access appsettings.json values in controller classes

Question

Having trouble figuring out how to read appsettings.json values outside of the startup.cs. What I would like to do is, for instance, is in the _Layout.cshtml, add the site name from the config:

For example:

ViewData["SiteName"] = Configuration.GetValue<string>("SiteSettings:SiteName"); 

Or even better:

public class GlobalVars {     public static string SiteName => Configuration.GetValue<string>("SiteSettings:SiteName"); } 

Here's my code thus far:

[appsettings.json]

"SiteSettings": {     "SiteName": "MySiteName" } 

[startup.cs]

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)         .AddEnvironmentVariables();     Configuration = builder.Build();      var siteName = Configuration.GetValue<string>("SiteSettings:SiteName"); }  public IConfigurationRoot Configuration { get; } 

Maybe I'm reading the docs wrong, but I can't seem to expose the Configuration object outside of the Startup class.

Answer 1

In your Startup.cs

    public void ConfigureServices(IServiceCollection services)     {         services.AddSingleton<IConfiguration>(Configuration);     } 

then in your controller:

public class ValuesController : Controller {     IConfiguration configuration;      public ValuesController(IConfiguration configuration)     {         this.configuration = configuration;     } }