Asp.net MVC 5 Routing, mvcrouting

Asp.net MVC 5 Routing, mvcrouting

ASP. net mvc is a classic model-view-controller mode applicable to WEB applications. Compared with web forms, asp.net mvc is composed of various code layers connected together.

Recently, I have been involved in the asp.net mvc project, and I have forgotten a lot of my memories.

First, it is about Routing.

ASP. net mvc no longer depends on physical pages. You can use your own syntax to customize URLs and use these syntax to specify resources and operations. The syntax is expressed by a set in URL mode, also known as a route.

A route is a pattern matching string representing the absolute URL path. Therefore, a route can be a constant string or contain some placeholders.

Create an asp.net mvc project. In the global. asax file, we can see that the route is registered here, so that the program can be processed at startup.

 

The common routing features include name, URL mode, and default value.

Let's see what the route for the new project is like. We open RouteConfig

namespace HEAMvcDemo{    public class RouteConfig    {        public static void RegisterRoutes(RouteCollection routes)        {            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");            routes.MapRoute(                name: "Default",                url: "{controller}/{action}/{id}",                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }            );        }    }}

MapRoute is usually used to fill in the static set of mvc route object management. The MapRoute method provides many heavy loads.

The first parameter is the route name. Here it is set to Default, and each route has a unique name.

The second parameter is the URL mode.

The third parameter is the default value of the URL-specified parameter.

 

We can customize conditions to constrain routing.

For example, the id must be a five-digit number.

routes.MapRoute(                name: "Default",                url: "{controller}/{action}/{id}",                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }，                          new {id=@"\d{5}"}            );

So what is the meaning of routes. IgnoreRoute ("{resource}. axd/{* pathInfo ??

This Code instructs the routing system to ignore any. axd request.

 

When we click run on the newly created page, we can see that the address of the browser is http: // localhost: 49627/. Which controller view is opened in one operation ??

In route configuration, new {controller = "Home", action = "Index", id = UrlParameter. optional}, which defines the controller view opened by default. When the url is not in the complete URL mode, → {controller}/{action}/{id }.

Let's take a look at this URL http: // localhost: 49627/Home/About

Controller = Home action = About id = ?? So what about id? Why is there no id here? It is because id = UrlParameter. Optional, where id is an Optional parameter

 

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