How do I route a url with a querystring in asp net mvc

Introduction

ASP.NET is a popular used for building web . One common task in ASP.NET MVC is routing URLs with query strings. In this article, we will explore how to route a URL with a query string in ASP.NET MVC.

Routing in ASP.NET MVC

Routing is the process of mapping a URL to a specific controller action in ASP.NET MVC. It allows you to define custom URL patterns and handle them in your application. By , ASP.NET MVC uses a convention-based routing system, URLs are mapped to controller based on their and parameters.

Defining a Route with a Query String

To route a URL with a query string in ASP.NET MVC, you need to define a custom route in your application's route configuration. The route configuration is typically in the RouteConfig.cs file in the App_Start folder.

Let's say you have a URL like /products?id=123 and you want to route it to the ProductsController‘s Details action. Here's how you can define the route:


routes.MapRoute(
    name: "ProductDetails",
    url: "products",
    defaults: new { controller = "Products", action = "Details" }
);

In the above example, we define a route named “ProductDetails” with a URL pattern of “products”. The defaults parameter specifies the controller and action to be invoked when this route is matched.

Accessing the Query String Parameters

Once you have defined the route, you can access the query string parameters in your controller action. In the case of our example, the Details action in the ProductsController can access the id parameter using the Request.QueryString property:


public ActionResult Details()
{
    string id = Request.QueryString["id"];
    // Do something with the id parameter
    return View();
}

In the above code, we retrieve the of the id parameter from the query string using the Request.QueryString property. You can then use this value to any necessary operations in your action.

Conclusion

Routing URLs with query strings in ASP.NET MVC is a common task when building web applications. By defining custom routes and accessing the query string parameters in your controller actions, you can easily handle and process URLs with query strings in your application.

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