Injecting strings and services with Net Core default DI

Question

I have a Net Core 2.1 Console application where I do something like this:

class Program
{
    static void Main(string[] args)
    {
        var configuration = new ConfigurationBuilder()
            .AddJsonFile("appsettings.json", false)
            .Build();

        var fullPath = configuration.GetValue<string>("tempPath:fullPath");

        serviceCollection.AddTransient<MyService>();
        serviceCollection.AddTransient<Worker>();
        ...


public class Worker
{
    public string FullPath {get; set;}
    private readonly MyService _myService;

    public Worker(MyService myService,
        string fullpath)
    {
        _myService = myService;
        FullPath=fullpath;
    }

In other words, I need to inject services and configuration string in my Worker class in some way.

Can someone suggest me the right way to do it?

Answer 1

Just change your DI configuration to the following:

var fullPath = configuration.GetValue<string>("tempPath:fullPath");
serviceCollection.AddTransient<MyService>();
serviceCollection.AddTransient<Worker>(x => new Worker(x.GetRequiredService<MyService>(), fullPath));

Or as suggested use the IOptions interface to inject your configuration object into the class.