c# - ASP.NET 5 - 在 Startup.Configure 中访问依赖容器

Question

我想访问我的 Options 实例，它作为单例添加到 ConfigureServices 中。这是我的代码:

public class Startup
{
    private IConfiguration Configuration { get; set; }

    public Startup(IHostingEnvironment env, IApplicationEnvironment appEnv)
    {
        var builder = new ConfigurationBuilder(appEnv.ApplicationBasePath)
            .AddJsonFile("config.json")
            .AddEnvironmentVariables();

        Configuration = builder.Build();
    }
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddSingleton((serviceProvider) => ConfigurationBinder.Bind<Options>(Configuration));
    }

    public void Configure(IApplicationBuilder app)
    {
        var root = ""; // I want to access my Options instance to get root from it
        var fileServerOptions = new FileServerOptions()
        {
            FileProvider = new PhysicalFileProvider(root)
        };
        app.UseFileServer(fileServerOptions);
    }
}

我的问题是如何访问 Configure 方法中的 Options 实例来设置根变量。

Answer 1

如 How to use ConfigurationBinder in Configure method of startup.cs 中的建议，运行时可以将选项直接注入(inject)到 Configure 方法中:

public void Configure(IApplicationBuilder app, Options options)
{
    // do something with options
}