ASP.NET Web API exposes data through a controller called an API controller.  This controller can be added to an existing controller.  To add a new controller:

Right-click the controllers folder in the ChlodnyWebApi project and select Add –> Controller. In the dialog box, name the new controller ‘CustomerController’ and for template select ‘Empty API controller’.

Click Add, there will now be an empty CustomerController.cs that will look similar to this.

namespace ChlodnyWebApi.Controllers
{
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using DataAccess;
using DataAccess.Entities;

    public class CustomerController : ApiController
{
}
}

For the initial Get method example, one method does not take a parm and the second one does.  First one will return and IEnumerable of all customers and the other will return a single customer based on the customer id passed in.  The two methods will look like this:

public IEnumerable<Customer> GetCustomer()
{
using (var context = new ChinookContext())
{
return context.Customers.ToList();
}
}

public Customer GetCustomer(int id)
{
using (var context = new ChinookContext())
{
return context.Customers.Single(c => c.CustomerId == id);
}
}

• Now build the project and start
• Open Fiddler
• Under composer select the GET verb
• Enter the address http://localhost:60025/api/customer(change the port to to match)
• Click Execute
• Under Web Sessions select the following:

• Fiddler should switch to the Inspector and look similar to this (including all the customer records in the Chinook database).

• Enter the address http://localhost:60025/api/customer/1(change the port to to match)
• Click Execute
• Under Web Sessions select the following:

This will now return only the record with customer id equal to 1.