Window Service to run API

Hi Isiaka ,

Please follow these steps to create window service to run API.

using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

namespace MyApiService
{
    public class Program
    {
        public static void Main(string[] args)
        {
            // Run as a console application during debugging
            if (Debugger.IsAttached || args.Contains("--console"))
            {
                CreateHostBuilder(args).Build().Run();
            }
            else
            {
                // Run as a Windows Service
                var pathToExe = Process.GetCurrentProcess().MainModule.FileName;
                var pathToContentRoot = Path.GetDirectoryName(pathToExe);
                Directory.SetCurrentDirectory(pathToContentRoot);

                var host = CreateHostBuilder(args).Build();

                host.RunAsService();
            }
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup();
                }).UseWindowsService();
    }

    public class MyApiService : IHostedService
    {
        private readonly IWebHost _webHost;

        public MyApiService(IWebHost webHost)
        {
            _webHost = webHost;
        }

        public Task StartAsync(CancellationToken cancellationToken)
        {
            return _webHost.StartAsync(cancellationToken);
        }

        public Task StopAsync(CancellationToken cancellationToken)
        {
            return _webHost.StopAsync(cancellationToken);
        }
    }
}

In this code, we have the Program class that serves as the entry point for our application. It checks whether the application is running in console mode or as a Windows Service. If it's running in console mode (e.g., during debugging), it starts the API using the CreateHostBuilder method and runs it. If it's running as a Windows Service, it sets the content root directory and creates a host using CreateHostBuilder, then calls RunAsService() to run the API as a Windows Service.

The MyApiService class implements the IHostedService interface, which allows the service to be started and stopped by the host. In the StartAsync method, we start the web host, and in the StopAsync method, we stop it.