Configure instance before injection

Question

Adding windows service support in Main method of console project:

var myVariable = "example";
Host.CreateDefaultBuilder().ConfigureServices((hostContext, services) =>
{
    services.AddHostedService<Worker>();
}).UseWindowsService().Build().Run();

Worker class:

public class Worker : BackgroundService
{
....
    protected override Task ExecuteAsync(CancellationToken stoppingToken)
    {
        // Need to use myVariable here
    }
}

How to pass myVariable to worker class instance?

Answer 1

If I have misunderstood please let me know, but if your worker had the appropriate constructor defined:

public class Worker : IWorker 
{
     private readonly string example = String.Empty;
     public Worker(string example) => this.example = example;

     ...
}

When you do your dependency injection you would do something along these lines:

var example = "Passed?";
services.AddSingleton<IWorker>(configure => new Worker(passed));

I believe that is what you are inquiring.