1.6.3. Building a API and testing

--

• 1.Create Api folder in controller folder, right click -> Add -> Controller -> Web API 2 Controller - Empty

• 2.Paste in Global.asax:

    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            GlobalConfiguration.Configure(WebApiConfig.Register);
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }
    }

• 3.Write code in controller:

    private ApplicationDbContext _context;
  
        public CustomersController()
        {
            _context = new ApplicationDbContext();
        }
  
        // GET /api/customers
        public IEnumerable<Customer> GetCustomers()
        {
            return _context.Customers.ToList();
        }
  
        // GET /api/customers/1
        public Customer GetCustomers(int id)
        {
            var customer = _context.Customers.SingleOrDefault(c => c.Id == id);
  
            if (customer == null)
            {
                throw new HttpResponseException(HttpStatusCode.NotFound);
            }
  
            return customer;
        }
  
        // POST /api/customers
        [HttpPost]
        public Customer CreateCustomers(Customer customer)
        {
            if (!ModelState.IsValid)
            {
                throw new HttpResponseException(HttpStatusCode.BadRequest);
            }
  
            _context.Customers.Add(customer);
            _context.SaveChanges();
  
            return customer;
        }
  
        // PUT /api/customers/1
        [HttpPut]
        public void UpdateCustomers(int id, Customer customer)
        {
            if (!ModelState.IsValid)
            {
                throw new HttpResponseException(HttpStatusCode.BadRequest);
            }
  
            var customerInDb = _context.Customers.SingleOrDefault(c => c.Id == id);
  
            if (customerInDb == null)
            {
                throw new HttpResponseException(HttpStatusCode.NotFound);
            }
  
            customerInDb.Name = customer.Name;
            customerInDb.Birthday = customer.Birthday;
            customerInDb.IsSubscribeToNesletter = customer.IsSubscribeToNesletter;
            customerInDb.membershipTypeId = customer.membershipTypeId;
  
            _context.SaveChanges();
        }
  
        // PUT /api/customers/1
        [HttpDelete]
        public void DeleteCustomers(int id)
        {
            var customerInDb = _context.Customers.SingleOrDefault(c => c.Id == id);
  
            if (customerInDb == null)
            {
                throw new HttpResponseException(HttpStatusCode.NotFound);
            }
  
            _context.Customers.Remove(customerInDb);
            _context.SaveChanges();
        }

• 4.Test API

  • Open the browser and type: http://localhost:3968/Api/Customers

  • use POSTman

    • post

      • set header

        • key: content-type

        • value: application/json

      • set body

          {
              "Name": "Sea123",
              "IsSubscribeToNesletter": true,
              "membershipType": null,
              "membershipTypeId": 2,
              "Birthday": "2001/12/11"
          }