static void Main(string[] args)
{
var host = new HostBuilder();
// 環境パスのDOTNETCORE_ENVIRONMENTを取得
var environment = Environment.GetEnvironmentVariable("DOTNETCORE_ENVIRONMENT") ?? "Development";
// 環境の設定
host.UseEnvironment(environment);
// ホストの構成
host.ConfigureHostConfiguration(config =>
{
// Microsoft.Extensions.Configuration
config.SetBasePath(Directory.GetCurrentDirectory());
// Microsoft.Extensions.Configuration.EnvironmentVariables
// 環境変数の先頭文字列"EnvironmentSettingModel_"の変数を取り込む.
// 取り込んだ環境変数の名前は"EnvironmentSettingModel_"の部分がトリミングされる
config.AddEnvironmentVariables(prefix: "EnvironmentSettingModel_");
// Microsoft.Extensions.Configuration.JSON
// 環境変数DOTNETCORE_ENVIRONMENTの設定値を使用する。
config.AddJsonFile($"Settings/setting.json");
// 同じ定義は後に読み込んだ方で上書きされる
config.AddJsonFile($"Settings/setting.{environment}.json");
// Microsoft.Extensions.Configuration.Ini
config.AddIniFile("Settings/setting.ini");
// Microsoft.Extensions.Configuration.XML
config.AddXmlFile("Settings/setting.xml");
// Microsoft.Extensions.Configuration.Memory
config.AddInMemoryCollection(new Dictionary <string, string>()
{
{ "InMemoryMessage", "Hello InMemoryCollection!" }
});
// Microsoft.Extensions.Configuration.CommandLine
config.AddCommandLine(args);
});
// アプリケーションの構成
host.ConfigureAppConfiguration((hostContext, config) =>
{
var env = hostContext.HostingEnvironment;
if (env.IsDevelopment())
{
// Microsoft.Extensions.Configuration.UserSecrets
config.AddUserSecrets <Program>();
}
});
// サービスの構成
host.ConfigureServices((hostContext, config) =>
{
// Microsoft.Extensions.DependencyInjection
config.AddHostedService <SampleService>();
// Microsoft.Extensions.Options.ConfigurationExtensions
config.Configure <IniSettingModel>(hostContext.Configuration.GetSection("IniSettingModel"));
config.Configure <JsonSettingModel>(hostContext.Configuration.GetSection("JsonSettingModel"));
config.Configure <XmlSettingModel>(hostContext.Configuration.GetSection("XmlSettingModel"));
config.Configure <UserSecretModel>(hostContext.Configuration.GetSection("UserSecretSettingModel"));
config.Configure <CommandLineSettingModel>(hostContext.Configuration.GetSection("CommandLineSettingModel"));
// こういった方法でも使用可能
var message = hostContext.Configuration.GetValue <String>("UserSecretSettingModel:Message");
var messageModel1 = hostContext.Configuration.GetSection("UserSecretSettingModel").Get <BaseSettingModel>();
var messageModel2 = hostContext.Configuration.GetValue <UserSecretModel>("UserSecretSettingModel");
var messageModel3 = new BaseSettingModel();
hostContext.Configuration.GetSection("UserSecretSettingModel").Bind(messageModel3);
});
host.UseConsoleLifetime().Build().Run();
}