Creating a Simple API Endpoint

🧩 Creating a Simple API Endpoint

Let’s build a ProductsController that supports basic CRUD operations.

🛒 Product Model

public class Product
{
    public int Id { get; set; }
    public string Name { get; set; } = string.Empty;
    public decimal Price { get; set; }
}

🔧 ProductsController.cs

[ApiController]
[Route("api/[controller]")]
public class ProductsController : ControllerBase
{
    private static readonly List<Product> _products = new();

    [HttpGet]
    public ActionResult<IEnumerable<Product>> GetAll() => _products;

    [HttpGet("{id}")]
    public ActionResult<Product> Get(int id)
    {
        var product = _products.FirstOrDefault(p => p.Id == id);
        return product is null ? NotFound() : Ok(product);
    }

    [HttpPost]
    public ActionResult<Product> Create(Product product)
    {
        product.Id = _products.Count + 1;
        _products.Add(product);
        return CreatedAtAction(nameof(Get), new { id = product.Id }, product);
    }

    [HttpPut("{id}")]
    public IActionResult Update(int id, Product updatedProduct)
    {
        var product = _products.FirstOrDefault(p => p.Id == id);
        if (product is null) return NotFound();

        product.Name = updatedProduct.Name;
        product.Price = updatedProduct.Price;

        return NoContent();
    }

    [HttpDelete("{id}")]
    public IActionResult Delete(int id)
    {
        var product = _products.FirstOrDefault(p => p.Id == id);
        if (product is null) return NotFound();

        _products.Remove(product);
        return NoContent();
    }
}