Application console

Liens

• Command Line Parser Library
• Async Main

Code

using System; namespace MonNS { class MaClasse { public static void Main(string[] args) { Console.WriteLine(""); } } }

Read input

ConsoleKeyInfo keyInfo = Console.ReadKey(true); if (keyInfo.Key == ConsoleKey.Escape) { }

Masquer la saisie d'un mot de passe

public static string ReadPassword() { string password = ""; ConsoleKeyInfo info = Console.ReadKey(true); while (info.Key != ConsoleKey.Enter) { if (info.Key != ConsoleKey.Backspace) { Console.Write("*"); password += info.KeyChar; } else if (info.Key == ConsoleKey.Backspace) { if (!string.IsNullOrEmpty(password)) { // remove one character from the list of password characters password = password.Substring(0, password.Length - 1); // get the location of the cursor int pos = Console.CursorLeft; // move the cursor to the left by one character Console.SetCursorPosition(pos - 1, Console.CursorTop); // replace it with space Console.Write(" "); // move the cursor to the left by one character again Console.SetCursorPosition(pos - 1, Console.CursorTop); } } info = Console.ReadKey(true); } // add a new line because user pressed enter at the end of their password Console.WriteLine(); return password; }

Masquer la fenêtre de la Console

[DllImport("kernel32.dll")] private static extern IntPtr GetConsoleWindow(); [DllImport("user32.dll")] private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow); private const int SW_HIDE = 0; private const int SW_SHOW = 5; var handle = GetConsoleWindow(); ShowWindow(handle, SW_HIDE);

Couleurs

Console.BackgroundColor = ConsoleColor.DarkRed; Console.ForegroundColor = ConsoleColor.Green; Console.WriteLine("..."); Console.ResetColor();

Dependency injection

• Dependency injection in .net core console application

dotnet add package Microsoft.Extensions.DependencyInjection

Program.cs

static void Main(string[] args) { ServiceProvider serviceProvider = ConfigureServices(services); IServiceScope scope = serviceProvider.CreateScope(); scope.ServiceProvider.GetRequiredService<ConsoleApplication>().Run(); serviceProvider.GetRequiredService<ConsoleApplication>().Run(); } private static ServiceProvider ConfigureServices(IServiceCollection services) => new ServiceCollection() .AddSingleton<IConfiguration>( _ => new ConfigurationBuilder() .AddJsonFile("appsettings.json", optional: true, reloadOnChange: false); .AddUserSecrets<Program>() .Build()) .AddSingleton<IMyService, MyService>() .BuildServiceProvider();

ConsoleApplication.cs

class ConsoleApplication { private readonly IConfiguration configuration; private readonly IMyService myService; public ConsoleApplication(IConfiguration configuration, IMyService myService) { this.configuration = configuration; this.myService = myService; } public void Run() { var serviceProvider = ConfigureServices(); using var dbContext = serviceProvider.GetService<AppDbContext>(); myService.DoSomething(); } private ServiceProvider ConfigureServices() => new ServiceCollection() .AddDbContext<AppDbContext>( x => x.UseMySql(BuildConnectionString(), mySqlOptions => mySqlOptions.ServerVersion("10.5.8-mariadb"))) .BuildServiceProvider(); private string BuildConnectionString() { var connectionStringBuilder = new SqlConnectionStringBuilder("server=localhost;database=test;user=test;"); connectionStringBuilder.Password = configuration["DbPassword"]; return connectionStringBuilder.ConnectionString; } }

Logging in .Net Core Console Apps

• Serilog

dotnet add package Microsoft.Extensions.Logging dotnet add package Microsoft.Extensions.Logging.Console

Program.cs

static void Main(string[] args) { var services = new ServiceCollection(); ConfigureServices(services); // log var serviceProvider = services.BuildServiceProvider(); var logger = serviceProvider.GetService<ILoggerFactory>() .CreateLogger<Program>(); logger.LogDebug("Starting application"); } private static void ConfigureServices(IServiceCollection services) { services.AddLogging(configure => configure.AddConsole()); }

Configuration

dotnet add package Microsoft.Extensions.Configuration.Json

Program.cs

private static IConfiguration Configuration; static void Main(string[] args) { var builder = new ConfigurationBuilder() .SetBasePath(AppContext.BaseDirectory) .AddJsonFile("appsettings.json"); Configuration = builder.Build();