Untitled

using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Threading.Tasks;
using System.Web.Http;
using YourApp.Models;

namespace YourApp.Controllers
{
    public class ProductsController : ApiController
    {
        private readonly YourDbContext _context;

        public ProductsController()
        {
            _context = new YourDbContext();
        }

        // GET: api/Products
        [HttpGet]
        public async Task<IHttpActionResult> GetProducts()
        {
            var products = await _context.Products.ToListAsync();
            return Ok(products);
        }

        // GET: api/Products/5
        [HttpGet]
        public async Task<IHttpActionResult> GetProduct(int id)
        {
            var product = await _context.Products.FindAsync(id);
            if (product == null)
            {
                return NotFound();
            }

            return Ok(product);
        }

        // POST: api/Products
        [HttpPost]
        public async Task<IHttpActionResult> AddProduct(Product product)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            _context.Products.Add(product);
            await _context.SaveChangesAsync();

            return CreatedAtRoute("DefaultApi", new { id = product.ProductId }, product);
        }

        // PUT: api/Products/5
        [HttpPut]
        public async Task<IHttpActionResult> UpdateProduct(int id, Product product)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != product.ProductId)
            {
                return BadRequest();
            }

            _context.Entry(product).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!ProductExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return StatusCode(System.Net.HttpStatusCode.NoContent);
        }

        // DELETE: api/Products/5
        [HttpDelete]
        public async Task<IHttpActionResult> DeleteProduct(int id)
        {
            var product = await _context.Products.FindAsync(id);
            if (product == null)
            {
                return NotFound();
            }

            _context.Products.Remove(product);
            await _context.SaveChangesAsync();

            return Ok(product);
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                _context.Dispose();
            }
            base.Dispose(disposing);
        }

        private bool ProductExists(int id)
        {
            return _context.Products.Any(e => e.ProductId == id);
        }
    }
}