.NET Core 控制台程序没有 ASP.NET Core 的 IWebHostBuilder 与 Startup.cs ,那要读 appsettings.json、注依赖、配日志、设 IOptions 该怎么办呢?因为这些操作与 ASP.NET Core 无依赖,所以可以自己动手,轻松搞定。
1、读 appsettings.json ,ConfigurationBuilder 上
varconf = newConfigurationBuilder() .SetBasePath(Directory.GetCurrentDirectory()) .AddJsonFile("appsettings.json", true, true) .AddJsonFile("appsettings.Development.json", true, true) .Build();
需要安装 nuget 包 Microsoft.Extensions.Configuration 、Microsoft.Extensions.Configuration.FileExtensions 、Microsoft.Extensions.Configuration.Json
2、注依赖,IServiceCollection + IServiceProvider 一起来
IServiceCollection services = newServiceCollection();//...services.AddSingleton<CosClient> ();IServiceProvider serviceProvider = services.BuildServiceProvider();varcosClient = serviceProvider.GetService<CosClient>();
需要安装 nuget 包 Microsoft.Extensions.DependencyInjection
3、配日志, AddLogging 与 ILoggingBuilder 肩并肩
services.AddLogging(builder => builder .AddConfiguration(conf.GetSection("Logging")) .AddConsole());
需要安装 nuget 包 Microsoft.Extensions.Logging 、Microsoft.Extensions.Logging.Configuration 、Microsoft.Extensions.Logging.Console
4、设IOptions,AddOptions() 与 Configure<T> 齐步走
services.AddOptions();services.Configure<CosClientOptions>(conf.GetSection( "cosClient"));
需要安装 nuget 包 Microsoft.Extensions.Options 与 Microsoft.Extensions.Options.ConfigurationExtensions
完整代码:
classProgram{
staticasyncTask Main( string[] args) { varconf = newConfigurationBuilder() .SetBasePath(Directory.GetCurrentDirectory()) .AddJsonFile("appsettings.json", true, true) .AddJsonFile("appsettings.Development.json", true, true) .Build(); IServiceCollection services = newServiceCollection(); services.AddLogging(builder => builder .AddConfiguration(conf.GetSection("Logging")) .AddConsole()); services.AddOptions(); services.Configure<CosClientOptions>(conf.GetSection( "cosClient")); services.AddSingleton<CosClient> (); IServiceProvider serviceProvider = services.BuildServiceProvider();
varcosClient = serviceProvider.GetService<CosClient> (); }}