netcore3.1配置webapi Controller打開報錯

問題描述：剛配置好了swagger，沿用netcore2.2的配置繼續在瀏覽器打開api控制器，結果報錯了。。。

解決方法：從路由層面查找了半天原因，無果，最后把api頁面中的跨域設置去掉后正常了，看來和跨越設置有關，繼續查找，原來是注冊時候順序導致的問題

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseStaticFiles();
            app.UseCookiePolicy();
            app.UseRouting();
            //允許跨域 位置和必須放對，否則加載出錯
            app.UseCors("any");
            app.UseEndpoints(endpoints => endpoints.MapDefaultControllerRoute());

            //啟用中間件服務生成Swagger作為JSON終結點
            app.UseSwagger();
            //啟用中間件服務對swagger-ui，指定Swagger JSON終結點
            app.UseSwaggerUI(c =>
            {
                c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
            });

            var log = LogManager.GetLogger(repository.Name, typeof(Startup));
            log.Info("Start Runing");
        }

跨域設置加載必須放到UseRouting和UseEndpoints中間

參考鏈接：https://www.cnblogs.com/puzi0315/p/12197612.html