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ASP .NET Web API CRUD operation using Entity Framework-Controller
public class CustomersController : ApiController
{
private CustomerAPIContext db = new CustomerAPIContext();
// GET: api/Customers
public IQueryable<Customer> GetCustomers()
{
return db.Customers;
}
// GET: api/Customers/5
[ResponseType(typeof(Customer))]
public IHttpActionResult GetCustomer(int id)
{
Customer customer = db.Customers.Find(id);
if (customer == null)
{
return NotFound();
}
return Ok(customer);
}
// PUT: api/Customers/5
[ResponseType(typeof(void))]
public IHttpActionResult PutCustomer(int id, Customer customer)
{
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
if (id != customer.CustId)
{
return BadRequest();
}
db.Entry(customer).State = EntityState.Modified;
try
{
db.SaveChanges();
}
catch (DbUpdateConcurrencyException)
{
if (!CustomerExists(id))
{
return NotFound();
}
else
{
throw;
}
}
return StatusCode(HttpStatusCode.NoContent);
}
// POST: api/Customers
[ResponseType(typeof(Customer))]
public IHttpActionResult PostCustomer(Customer customer)
{
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
db.Customers.Add(customer);
db.SaveChanges();
return CreatedAtRoute("DefaultApi", new { id = customer.CustId }, customer);
}
// DELETE: api/Customers/5
[ResponseType(typeof(Customer))]
public IHttpActionResult DeleteCustomer(int id)
{
Customer customer = db.Customers.Find(id);
if (customer == null)
{
return NotFound();
}
db.Customers.Remove(customer);
db.SaveChanges();
return Ok(customer);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
db.Dispose();
}
base.Dispose(disposing);
}
private bool CustomerExists(int id)
{
return db.Customers.Count(e => e.CustId == id) > 0;
}
}
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