ASP.NET Core 2.0中间件

本文介绍了ASP.NET Core 2.0中间件-访问配置设置的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在asp核心Web API中间件中，是否可以访问中间件中的配置?有人可以指导我如何做到吗?

In a asp core web api middleware, is it possible to access the configuration inside the middleware? Can someone guide me how this is done?

推荐答案

在middle-ware中，您可以访问设置.为此，您需要在middle-ware构造函数中获取IOptions<AppSettings>.请参阅以下示例.

In a middle-ware you can access settings. To achieve this, you need to get IOptions<AppSettings> in the middle-ware constructor. See following sample.

public static class HelloWorldMiddlewareExtensions { public static IApplicationBuilder UseHelloWorld( this IApplicationBuilder builder) { return builder.UseMiddleware<HelloWorldMiddleware>(); } } public class HelloWorldMiddleware { private readonly RequestDelegate _next; private readonly AppSettings _settings; public HelloWorldMiddleware( RequestDelegate next, IOptions<AppSettings> options) { _next = next; _settings = options.Value; } public async Task Invoke(HttpContext context) { await context.Response.WriteAsync($"PropA: {_settings.PropA}"); } } public class AppSettings { public string PropA { get; set; } }

有关更多信息，请参见此处.

For more information see here.