MVC_Route层层深入

namespace Study_MVC_Route.Controllers
{
    public class HomeController : Controller
    {
        // GET: Home
        public ActionResult Index()
        {
            return View();
        }
        public string Regex(int year,int month,int day)
        {
            return $"{year}-{month}-{day}";
　　　　　　　//$是在字符串中内嵌参数
        }
    }
}

namespace Study_MVC_Route.Controllers
{
    public class AboutController : Controller
    {
        // GET: About
        public ActionResult Index()
        {
            return View();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace Study_MVC_Route
{
    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)//路由集，由上往下匹配路由
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");//忽略路由

            //--------------------------------添加路由------------------------------------------
            //以Test开始的url
            //url没有引入controller参数，所以controller使用默认值，若不给参数赋值，也使用默认值

            routes.MapRoute(
                name: "Test",
                url: "Test/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );






　　　　　　　
            //Route的书写可以省略命名参数，即name、url、defaults这些命名参数可以省略，如下
            //url为About可以访问Home/Index
            routes.MapRoute("About1", "About", new { controller = "Home", action = "Index", id = UrlParameter.Optional });
            //url为About访问About/Index
            routes.MapRoute("About2", "{controller}", new { controller = "Home", action = "Index", id = UrlParameter.Optional });

　　　　　　　//加大括号表示参数，不加则为一个普通字符串链接，是一个硬性的匹配要求

　　　　　　　//传参对比
            //使用constraints做参数约束
            //home/Regex_2014_05_19
            routes.MapRoute(
                name: "Regex",
                url: "{controller}/{action}_{year}_{month}_{day}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional },
                constraints: new { year = @"\d{4}", month = @"\d{2}", day = @"\d{2}" }// @"\d{4}"表示输入四位数字，@表取消\的转译效果
            );
　　　　　　　//普通传参
            //home/Regex?year=2014&month=05&day=19
            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
            );
        }
    }
}