5. Implementing a GET Endpoint to Retrieve Coupons in ASP.NET Core Minimal API

Description: In this tutorial, we'll walk through the process of implementing a GET endpoint in ASP.NET Core to retrieve coupons from a coupon store. Follow along as we write the code and discuss best practices for building robust APIs in C#. By the end of this tutorial, you'll have a solid understanding of how to design and implement a GET endpoint to serve coupon data to clients.

Code:

app.MapGet("/api/coupon", () =>
{
    return Results.Ok(CouponStore.couponList);
});

Explanation:

We use the app.MapGet() method to define a route handler for handling GET requests to the /api/coupon endpoint. Inside the route handler, we return an OK result (HTTP status code 200) along with the list of coupons stored in the CouponStore.couponList. This endpoint allows clients to retrieve the list of available coupons from the server.

Stay tuned for more tutorials on building web APIs with ASP.NET Core!