我正在将Asp.Net Core 2.2 Mvc应用程序转换为3.0；当我尝试重构代码以使用UseEndpoints代替UseMvc时，似乎无法识别路由。

以下是使用UseMvc的startup.cs中的工作代码

public void Configure(IApplicationBuilder app,IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/EventLog/Error");
            app.UseHsts();
        }

        app.UseStaticfiles();
        app.UseCookiePolicy();
        app.UseSession();
        app.UseRequestLocalization();
        app.UseAuthentication();

        app.UseMvc(endpoints =>
        {

            endpoints.MapRoute("Grid","Grid/{action}/{view}",new
                {
                    Controller = "Grid",action = "View"
                });

            endpoints.MapRoute("default","{controller=Portal}/{action=Index}/{id?}");
        });
    }

这是UseEndpoints的重构代码

public void Configure(IApplicationBuilder app,IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/EventLog/Error");
            app.UseHsts();
        }

        app.UseStaticfiles();
        app.UseCookiePolicy();
        app.UseSession();
        app.UseRequestLocalization();
        app.UseAuthentication();
        app.UseRouting();
        app.UseAuthorization();
        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllerRoute("Grid","Grid/{action}/{virtualaction}",action = "View"
                });

            endpoints.MapControllerRoute("default","{controller=Portal}/{action=Index}/{id?}");
        });
    }

当我使用UseEndpoints代码运行应用程序时，我从自定义AuthorizationHandler中收到错误消息，因为httpContextaccessor.HttpContext.Request.RouteValues中没有值。如果删除Grid路由的MapControllerRoute代码，则默认路由可以与AuthorizationHandler一起正常工作。使用UseEndpoints时可以有多个控制器路由模式吗？