NET Core的mvc服务和Route服务学习总结

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/ITzhongzi/article/details/80924662

mvc服务 和 route服务

• 程序想要 增加 请求的路由服务，则需要 在ConfigureServices 中增加路由服务，如下

services.AddRouting();

并且在 Configure 中配置路由并使用，示例如下：

  var trackPackageRouteHandler = new RouteHandler(context =>
            {
                return context.Response.WriteAsync("33333");
            });

            var routeBuilder = new RouteBuilder(app, trackPackageRouteHandler);

            routeBuilder.MapRoute(
                "Track Package Route",
                "package/{operation:regex(^(track|create|detonate)$)}/{id:int}");
            var routes = routeBuilder.Build();

            app.UseRouter(routes);

• 对于mvc服务，当增加一个 mvc服务时，这其中默认包含并开启了 路由服务，也就是说 当使用 services.AddMvc();时，可以不用 services.AddRouting(); 依然可以在 Configure中配置并使用路由服务（虽然这是没有必要的）。

示例代码：

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


        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            var trackPackageRouteHandler = new RouteHandler(context =>
            {
                return context.Response.WriteAsync("33333");
            });

            var routeBuilder = new RouteBuilder(app, trackPackageRouteHandler);

            routeBuilder.MapRoute(
                "Track Package Route",
                "package/{operation:regex(^(track|create|detonate)$)}/{id:int}");
            var routes = routeBuilder.Build();

            app.UseRouter(routes);


            app.UseMvc();
        }

• mvc服务开启并使用时，系统会 自动找到所有 继承了 Controller的类，并查看他的路由特性，如果该类配置了路由特性的话，程序会自动实例化一个对象，并将相应的路由配置增加到 Route 上。
• 运行结果：我们可以看到访问相应设置的路由，数据成功返回
  

示例代码

对于以下demo我们访问 /value/test借口 就会收到 “test”的提示文本

• Startup.cs 文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Hosting.Internal;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;

namespace Configuration
{
    public class Startup
    {
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc();
        }


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

• ValueController.cs文件

using System;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

namespace Configuration.Controllers
{
    [Route("[controller]")]
    public class ValueController: Controller
    {
        public ILogger _logger;
        public ValueController(ILogger<Book> logger)
        {
            _logger = logger;
        }

        [HttpGet("Test")]
        public string Test()
        {
            Console.WriteLine("333333333333333333");
            _logger.LogInformation("ddddddddddddd");
            return "test";
        }
    }

    public class Book
    {
        public string name { get; set; }
        public string price { get; set; }
    }
}

• 运行结果 （我们可以看到访问Controller中的借口时，数据成功返回）