GetCustomerInvoiceController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using TeamDBAwesome.SqlService;
using TeamDBAwesome.Models;

namespace TeamDBAwesome.Controllers
{
    public class GetCustomerInvoiceController : ApiController
    {
        public HttpResponseMessage Get(int custId)
        {
            HttpResponseMessage message = new HttpResponseMessage(HttpStatusCode.OK);

            MySqlService sql = new MySqlService();

            List<Invoice> invoiceList = new List<Invoice>();

            int nextInvoice = sql.createInvoice(custId, payId, orderId);

            message.Content = new StringContent(nextInvoice.ToString());

            return message;
        }
    }
}