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.net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.net 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.
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