ASP.NET Core MVC 2.0 Cookbook

How to do it...

1. Here is the first way, inserting a constraint when creating a route conventionally:

app.UseMvc(routes => 
            { 
                routes.MapRoute( 
                    name: "default", 
                    template: "{controller=Home}/{action=Index}/{id?}" 
                ); 
 
                routes.MapRoute( 
                    name: "products", 
                    template: "Products/{id=1}", 
                    defaults: new { controller = "Product", action = "Details" } 
                ); 
            }); 

2. This is the second way, inserting a constraint by attribute routing:

// for an api controller [Route("api/[controller]")] public class ProductValuesController : Controller { // GET api/productvalues/5 [HttpGet("{id}")] public string Get(int id) { return "value"; } // PUT api/productvalues/laptop [HttpPut("{name:alpha:length(3)}")] public void UpdateProductName(string name) { } } // for a MVC controller ...