How popular is Reportdatasource() object in a webform.aspx?

Question

As an example below follows the example of the Entity, Interface, Repositorio and the Controller of the MVC system. In sequence the code of a formulário webform.aspx what use to display the Pedido usando o ReportViewer, the problem is that when I try to display the request always returns Null. When debugging the system does not arrive at the Repositorio, the impression I get is that the way I’m doing it works when it’s a Controller and fails when it’s a Webform.

With this Entity, Interface and Repository structure how do I popular the object ReportDataSource() in a Webform form ?

REQUESTED ENTITY:

public class Pedido
    {
        [Key]
        public int PedidoID { get; set; }
        public DateTime? DataPedido { get; set; }
    }

INTERFACE:

public interface IPedido: IDisposable
    {
        Pedido ObterPedidoPorID(int pPedidoID);
    }

REPOSITORY:

public class PedidoRepositorio: IPedido
    {
        private readonly ctx _repositorio = new ctx();
        private bool disposed = false;

        public Pedido ObterPedidoPorID(int pPedidoID)
        {

                return _repositorio.Pedidos.FirstOrDefault(c => c.PedidoID == pPedidoID);
        }

        protected virtual void Dispose(bool disposing)
        {
            if (!this.disposed)
            {
                if (disposing)
                {
                    _repositorio.Dispose();
                }
            }
            this.disposed = true;
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }
    }

CONTROLLER:

public class PedidoController : Controller
    {
        private IPedido _IRepositorio;

        public PedidoController()
            : this(new PedidoRepositorio())
        { }

        public PedidoController(IPedido repositorio)
        {
            _IRepositorio = repositorio;
        }


        [HttpGet]
        public ActionResult Editar(int pPedidoID)
        {
            try
            {
                Pedido _pedido = _IRepositorio.ObterPedidoPorID(pPedidoID);
                return View(_pedido);
            }
            catch
            {
                return View(new Pedido());
            }
        }
    }

REPORT - Request.aspx

public partial class Pedido : System.Web.UI.Page
    {
        public IPedido _IRepositorio;

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                int _PedidoID = 4;
                var _pedido = _IRepositorio.ObterPedidoPorID(_PedidoID);

                var reportDS = new ReportDataSource();
                reportDS.Name = "dsPedido";
                reportDS.Value = _pedido;

                rptPedido.LocalReport.DataSources.Add(reportDS);
                rptPedido.LocalReport.ReportPath = "Areas/Administrativo/Reports/Pedido.rdlc";
            }
        }
    }