How can i map all actions to C# class not ASP? - asp.net-mvc

Question

I want map all urls like /Home/User or /Home/About or /Home/Register or ... to c# page like this:
for example User.cs Page is like this:
public class User
{
public string run(UrlParameter id){
return "Hello World";
}
}
i want when user send request for /Home/User .. Call Run function of User Class and show return value to user. How can i do that in ASP MVC?
can i do this with change routes in RouteConfig? now current of my MVC routes is:
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 }
);
}
and when i call some url program run an asp page in view folder as default of MVC Project in c#.net.
For more explains:
I have protocol between my client side and server side program that is JSON. i want return string JSON when client ask something and for do it i do not need to asp page for rendering html, i only need to call some function that return JSON to client.
How can i do that with MVC?

Answer 1

I'm assuming your question has two parts.
For the first part : Mapping a url to a page. This is in a sense what routing is. It maps a url to an action, which could be a page or maybe a resource like a picture, or a response like JSON data. Notice it's not always a page, generally a url maps to a resource.
Read the URL routing docs here:
routes.MapRoute(
name: "Default",
url: "/Page1",
defaults: new { controller = "Home", action = "Page1",
id = UrlParameter.Optional }
);
In the above example : fakedomain.com/Page1 will run the Page1 method on the HomeController class and if there isn't any code you've added in there it will search for a Page1.aspx or Page1.cshtml inside your views folder.
I would recommend at this point reading about REST. I suggest this article : How I explained REST to my wife
For your second part : How do you return JSON data. Well you use WebApi. See the docs here.
WebApi allows you to write controllers that return data based on the request. So if your client sends an Ajax request with accept headers set to application/json, WebApi will return JSON.
Also it follows the typical system of asp.net-MVC's controllers, routes and actions.
So to return JSON data that represents products you would have a ProductController that looks like this:
public class ProductsController : ApiController
{
Product[] products = new Product[]
{
new Product { Id = 1, Name = "Tomato Soup",
Category = "Groceries", Price = 1 },
new Product { Id = 2, Name = "Yo-yo",
Category = "Toys", Price = 3.75M },
new Product { Id = 3, Name = "Hammer",
Category = "Hardware", Price = 16.99M }
};
public IEnumerable<Product> GetAllProducts()
{
return products;
}
public Product GetProductById(int id)
{
var product = products.FirstOrDefault((p) => p.Id == id);
if (product == null)
{
throw new HttpResponseException(HttpStatusCode.NotFound);
}
return product;
}
}
With asp.net-mvc4 and the default routing setup for WebApi the above controller would respond to the following URLs
This would get all products
/api/products/
This would get call the GetProductById and return ONE product:
/api/products/put_id_here
I would highly recommend getting all the pre-requisites like visual studio and asp.net-mvc from Web Platform installer and then follow this tutorial.