How can I achieve a in url routing in asp net core

Introduction

ASP.NET is a popular programming language used for building web applications. One of the key of ASP.NET is its ability to URL routing, which allows developers to define URLs for their web pages. In this article, we will explore how to achieve URL routing in ASP.NET Core.

What is URL Routing?

URL routing is the process of mapping a URL to a resource or in a web application. It allows developers to define custom URLs that are more user-friendly and meaningful. For example, instead of having a URL like “www.example.com/products?id=1”, we can have a URL like “www.example.com/products/1”. This not only improves the aesthetics of the URL but also makes it easier for users to remember and share.

Configuring URL Routing in ASP.NET Core

In ASP.NET Core, URL routing is configured in the Startup.cs file. The Configure method is where we define our routing rules. Let's take a look at an example:

public void Configure( app, IWebHostEnvironment env)
{
    app.UseRouting();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllerRoute(
            name: "default",
            pattern: "{=Home}/{action=Index}/{id?}");
    });
}

In the above code snippet, we are using the MapControllerRoute method to define our default route. The pattern parameter specifies the URL pattern, where {controller}, {action}, and {id} are placeholders for the controller, action, and optional ID respectively. This means that if a user visits a URL like “www.example.com”, the default route will be used, which maps to the Index action of the HomeController with no ID specified.

Customizing URL Routes

While the default route configuration for most scenarios, there may be cases where we need to define custom routes. Let's say we want to have a URL like “www.example.com/products/{productName}” instead of the default route. We can achieve this by a new route configuration:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseRouting();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllerRoute(
            name: "products",
            pattern: "products/{productName}",
            defaults: new { controller = "Products", action = "Details" });
        
        endpoints.MapControllerRoute(
            name: "default",
            pattern: "{controller=Home}/{action=Index}/{id?}");
    });
}

In the above code snippet, we have added a new route configuration for the “products” route. The pattern parameter specifies the URL pattern, where {productName} is a placeholder for the product name. We have also specified the default controller and action to be used when this route is matched.

Conclusion

URL routing is an essential feature of ASP.NET Core that allows developers to define custom URLs for their web applications. By configuring URL routing in the Startup.cs file, we can define how URLs are mapped to specific resources or actions. Whether using the default route or customizing it, URL routing in ASP.NET Core provides a flexible and user-friendly way to navigate web applications.

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