Appsetting.json read value of key in Controller Class,Comes Blank?

Question

In my .net core 2.0 application,I have created a appsettings.json file to store the configuration detail for the application.

appsettings.json

{
  "RestCalls": {
    "SFGetAllAccounts": "https://example.com",
    "SFGetIndividualAccount": "https://example.com",
    "B6GetAccount": "https://example.com"
  }
}

Equivalent .Net Class to Map values

public class AppConfiguration
{
    public string SFGetAllAccounts { get; set; }
    public string SFGetIndividualAccount { get; set; }
    public string B6GetAccount { get; set; }
}

In Startup.cs Added the following configuration

public IConfiguration Configuration { get; set; }
public Startup(IHostingEnvironment env)
{
    var builder =  new ConfigurationBuilder()
                  .SetBasePath(env.ContentRootPath)
                  .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true);

    Configuration = builder.Build();
}
public void ConfigureServices(IServiceCollection services)
{
    services.AddCors();
    services.AddMvc();
    services.Configure<AppConfiguration>(Configuration.GetSection("RestCalls"));
}

In the Controller Class, When Post method is called in the _configuration object is initialized and is blank so all the property from this class AppConfiguration is null.

public class HomeController : Controller
{
    private readonly IOptions<AppConfiguration> _configuration;
    public HomeController(IOptions<AppConfiguration> config)
    {
        this._configuration = config;
    }

    public IActionResult Post([FromBody]LoginModel model)
    {
        RESTCreatorHelper r = new RESTCreatorHelper(_configuration);
    }
}

I have searched a lot about this things on SO and tried many approaches nothing seems to work. Obivously i am missing something can you suggest what is need for the values to be filled in _configuration object and also how should i access the property value.

Answer 1

The problem was the file was inside a folder and it was not able to find the file . So I corrected the path

var builder = 
    new ConfigurationBuilder()
        .SetBasePath(env.ContentRootPath)
        .AddJsonFile("ConfigurationFiles/AppSettings.json", optional: true, reloadOnChange: true);

and also added AddOptions which binded the values correctly.

public void ConfigureServices(IServiceCollection services)
{
    services.AddOptions();
    services.Configure<AppConfiguration>(Configuration.GetSection("RestCalls"));
    services.AddMvc();
}

Answer 2

I think the issue is probably to do with .SetBasePath(env.ContentRootPath) which I believe will return to the wwwroot folder within the project and not the project root where appsettings.json sits.

If that's changed to .SetBasePath(Directory.GetCurrentDirectory()) it will hopefully start working.

I believe that in in asp.net core 1 the content root path was normally set to the current directory when the WebHostBuilder was created but that's from memory and I could be wrong.