是否可以在没有AddMvc的情况下在ASP.Net Core 2.1中创建路由映射？

Question

我是ASP.NET Core的新手，我搜索了很多但仍然对Core 2.1中的路由感到困惑。

所以，我创建了一个示例项目选择API作为模板，VS创建了如下内容：

public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseHsts();
        }

        app.UseHttpsRedirection();
        app.UseStaticFiles();
        app.UseMvc();

    }

但我不需要MVC提供的所有功能，因为我的项目不使用视图。

任何帮助将不胜感激

Answer 1

是的虽然我们经常使用MVC路由，但Routing是一个不依赖于MVC的项目。

与ASP.NET Core一起使用时，Routing在场景后面作为RouterMiddleware运行。如果你不想MVC，只需构建一个路由器：

private IRouter BuildRouter(IApplicationBuilder applicationBuilder)
{
    var builder = new RouteBuilder(applicationBuilder);

    // use middlewares to configure a route
    builder.MapMiddlewareGet("/api/hello", appBuilder => {
        appBuilder.Use(async (context,next) => {
            context.Response.Headers["H1"] = "Hello1";
            await next();
        });
        appBuilder.Use(async (context,next) => {
            context.Response.Headers["H2"] = "Hello2";
            await next();
        });
        appBuilder.Run(async (context) => {
            await context.Response.WriteAsync("Hello,world");
        });

    });

    builder.MapMiddlewarePost("/api/hello", appBuilder => {
        // ...
    });

    // ....

    return builder.Build();
}

并注册路由器中间件

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    // ...
    app.UseRouter(BuildRouter(app));
}

这是一个截图，它的工作原理：

Answer 2

是。来自https://docs.microsoft.com/en-us/aspnet/core/fundamentals/routing?view=aspnetcore-2.1：

var routeBuilder = new RouteBuilder(app, trackPackageRouteHandler);

routeBuilder.MapGet("hello/{name}", context => {
    var name = context.GetRouteValue("name");
    return context.Response.WriteAsync($"Hi, {name}!"); });            

var routes = routeBuilder.Build(); app.UseRouter(routes);

或者，如果要将其实现为自定义中间件，并且只需要基本路由：

来自：https://docs.microsoft.com/en-us/aspnet/core/fundamentals/middleware/?view=aspnetcore-2.1

public class Startup
{
    private static void HandleMapTest1(IApplicationBuilder app)
    {
        app.Run(async context =>
        {
            await context.Response.WriteAsync("Map Test 1");
        });
    }

    public void Configure(IApplicationBuilder app)
    {
        app.Map("/map1", HandleMapTest1);

        app.Run(async context =>
        {
            await context.Response.WriteAsync("Hello from non-Map delegate. <p>");
        });
    }
}

或者如果您需要更多路由功能，请参阅itmius'回答https://stackoverflow.com/a/52377807/2085502

Answer 3

解决了，使用以下启动：

public void ConfigureServices(IServiceCollection services)
{
     services.AddMvcCore().SetCompatibilityVersion(CompatibilityVersion.Version_2_1)
            .AddApiExplorer()
            .AddAuthorization()
            .AddJsonFormatters()
            .AddCors();
}

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseHsts();
    }

    app.UseHttpsRedirection();
    app.UseMvc();
}

感谢所有试图帮助我的人！