Get Value from appsettings.json file in common class

Question

I want to get value using Appsettings from appsettings.json file

My code is in appsettings.json file:

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AppSettings": {
    "APIURL": "https://localhost:44303/api"
  },
  "AllowedHosts": "*"
}

But I don't know how to get that value in common class file.

Answer 1

In general, you want to use strongly-typed configuration. Essentially, you just create a class like:

public class AppSettings
{
    public Uri ApiUrl { get; set; }
}

And then, in ConfigureServices:

services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));

Then, where you need to use this, you'd inject IOptions<AppSettings>:

public class Foo
{
    private readonly IOptions<AppSetings> _settings;

    public Foo(IOptions<AppSettings> settings)
    {
        _settings = settings;
    }

    public void Bar()
    {
        var apiUrl = _settings.Value.ApiUrl;
        // do something;
    }
}