What would be the equivalent code of web host builder for generic host builder for console application in 'Microsoft.Extensions.Hosting':
var hostBuilder = WebHost.CreateDefaultBuilder(args).UseConfiguration(config).UseStartup<TStartup>();
2 Answers
I couldn't find exactly analog. I use the next code for that. For my background services.
public static async Task Main(string[] args)
{
var host = new HostBuilder()
.ConfigureHostConfiguration(configHost => configHost.AddEnvironmentVariables("ASPNETCORE_"))
.ConfigureAppConfiguration((hostContext, configApp) =>
{
configApp.SetBasePath(GetConfigDirectoryPath());
configApp.AddJsonFile("appsettings.json", optional: false);
configApp.AddJsonFile($"appsettings.{hostContext.HostingEnvironment.EnvironmentName}.json", optional: true);
})
.ConfigureServices(ConfigureServices)
.UseHostedService<MyBackgroundService>()
.Build();
await host.RunAsync();
}
private static void ConfigureServices(HostBuilderContext hostBuilderContext, IServiceCollection services)
{
services.AddDbContext<AppDbContext>(options => options.UseSqlServer(hostBuilderContext.Configuration.GetConnectionString("Default")));
services.AddTransient<IDbContextProvider<AppDbContext>, DefaultDbContextProvider>();
services.AddTransient<IUnitOfWorkManager, UnitOfWorkManager>();
services.AddTransient(typeof(IUnitOfWork), typeof(EfCoreUnitOfWork));
services.AddTransient(typeof(IReadOnlyRepository<>), typeof(EfCoreReadOnlyRepositoryBase<>));
services.AddTransient(typeof(IReadOnlyRepository<,>), typeof(EfCoreReadOnlyRepositoryBase<,>));
services.AddTransient(typeof(IRepository<>), typeof(EfCoreRepositoryBase<>));
services.AddTransient(typeof(IRepository<,>), typeof(EfCoreRepositoryBase<,>));
services.AddDistributedRedisCache(options => options.Configuration = hostBuilderContext.Configuration.GetSection("Redis:Configuration").Value);
//Register AutoMapper profiles
var assemblies = AppDomain.CurrentDomain.GetAssemblies();
services.AddAutoMapper(assemblies);
}
Is implementing background service
public class MyBackgroundService : BackgroundService
public static class Extensions
{
public static IHostBuilder UseHostedService<T>(this IHostBuilder hostBuilder)
where T : class, IHostedService, IDisposable
{
return hostBuilder.ConfigureServices(services =>
services.AddHostedService<T>());
}
}
Would have been nice if you could elaborate what exactly you are looking for but following is from my sample console application written in .net6. wrote this to show-case dependency injection and use of NLog with Microsoft.Extensions.Logging
Skip following and Get the source from Github
Program.cs
using System.Reflection;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using NLog.Extensions.Logging;
using RedBeans.Examples.Console.DependencyInjectionLoggingExample;
Console.WriteLine("Hello, World!");
await Host.CreateDefaultBuilder(args)
.UseContentRoot(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location))
.ConfigureServices((context, services) =>
{
services.AddHostedService<MyApplication>()
.AddTransient<AnotherClass>()
.AddOptions<ConfigSection1Settings>().Bind(context.Configuration.GetSection("ConfigSection1"));
})
.ConfigureLogging((context, logging) =>
{
logging.ClearProviders();
logging.AddConfiguration(context.Configuration.GetSection("NLog"));
logging.AddNLog();
})
.RunConsoleAsync();
MyApplication.cs
namespace RedBeans.Examples.Console.DependencyInjectionLoggingExample;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
internal class MyApplication : IHostedService
{
private int? _exitCode;
private readonly ILogger<MyApplication> _logger;
private readonly AnotherClass _another;
private readonly IHostApplicationLifetime _applicationLifetime;
public MyApplication(IHostApplicationLifetime applicationLifetime, AnotherClass another, ILogger<MyApplication> logger)
{
_applicationLifetime = applicationLifetime;
_another = another;
_logger = logger;
}
public Task StartAsync(CancellationToken cancellationToken)
{
_logger.LogInformation($"Starting Application with arguments: {string.Join(";", Environment.GetCommandLineArgs())}");
_applicationLifetime.ApplicationStarted.Register(() =>
{
Task.Run(async () =>
{
try
{
_logger.LogInformation("My Application Business logic starts here!!!");
_another.AnotherFunction();
await Task.Delay(1000, cancellationToken);
_exitCode = 0;
}
catch (Exception ex)
{
_logger.LogError(ex, "Unhandled exception");
_exitCode = 1;
}
finally
{
_applicationLifetime.StopApplication();
}
});
});
return Task.CompletedTask;
}
public Task StopAsync(CancellationToken cancellationToken)
{
_logger.LogDebug($"Exiting with return code: {_exitCode}");
Environment.ExitCode = _exitCode.GetValueOrDefault(-1);
return Task.CompletedTask;
}
}
AnotherClass.cs
namespace RedBeans.Examples.Console.DependencyInjectionLoggingExample;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
internal class AnotherClass
{
private readonly ILogger _logger;
private readonly IOptions<ConfigSection1Settings> _configSection1;
public AnotherClass(IOptions<ConfigSection1Settings> configSection1, ILogger<AnotherClass> logger)
{
_logger = logger;
_configSection1 = configSection1;
}
public void AnotherFunction()
{
_logger.LogInformation($"I can tell you the value of configSection1.Config1 is {_configSection1.Value.Config1}");
}
}
ConfigSection1Settings.cs
namespace RedBeans.Examples.Console.DependencyInjectionLoggingExample;
internal sealed class ConfigSection1Settings
{
public string? Config1 { get; set; }
}
appsettings.json
{
"Logging": {
"LogLevel": {
"Default": "Debug",
"Microsoft.Hosting.Lifetime": "Warning",
"Microsoft.Extensions.Hosting.Internal.Host": "Warning"
}
},
"ConfigSection1": {
"Config1": "Value1"
},
"NLog": {
"throwConfigExceptions": true,
"targets": {
"async": true,
"logfile": {
"type": "File",
"fileName": "c:/temp/nlog-${shortdate}.log"
},
"logconsole": {
"type": "Console"
}
},
"rules": [
{
"logger": "Microsoft.*",
"maxLevel": "Error",
"final": true
},
{
"logger": "*",
"minLevel": "Info",
"writeTo": "logconsole"
},
{
"logger": "*",
"minLevel": "Debug",
"writeTo": "logfile"
}
]
}
}
Project File
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.1" />
<Content Include="appsettings.json">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
<PackageReference Include="NLog.Extensions.Logging" Version="5.0.1" />
</ItemGroup>
</Project>