ASP.NET vNext global config access

Question

What is the correct/recommended way of accessing the config.json file (or wherever else config is stored) in ASP.NET vNext?

In the Startup clas

Answer 1

In the first place, you should avoid registering your database context as a singleton. Also passing around the raw IConfiguration interface isn't a good practice.

In stead could create a POCO options class:

public class DbOptions
{
    public string ConnectionString { get; set }
}

And populate it in the ConfigureServices method using the section in the config.json:

services.Configure(Configuration.GetConfigurationSection("Data:DefaultConnection"));

Then you can inject it into your DbContext (and in controllers, etc.):

public sealed class Context : IdentityDbContext
{
    private readonly DbOptions _options;

    public DbSet Clients { get; set; }

    public Context(IOptions optionsAccessor)
    {
        // store the injected options
        _options = optionsAccessor.Options;
    }

    // other code..
}