protected void MaestrosComboSelectedIndexChanged(object sender, EventArgs e)
        {

            using (var fvhDb = new FvhContext.FvhDataContext())
            {
                var listadosPorMaestro = from maestro in fvhDb.Maestros
                                         join asignacion in fvhDb.AsignacionRegimenMaestros on maestro.IdMaestro equals
                                             asignacion.IdMaestro
                                             where maestro.IdMaestro == Convert.ToInt32(MaestrosCombo.SelectedValue)
                                         join regimen in fvhDb.Regimens on asignacion.IdRegimen equals regimen.IdRegimen
                                         select new
                                                    {
                                                        asignacion.IdAsignacionRegimenMaestro,
                                                        regimen.NombreRegimen,
                                                        regimen.DiasDeRegimen,
                                                        regimen.JornadasDeRegimen
                                                    };
                //RegimenCombo.Items.Clear();
                RegimenCombo.DataSource = listadosPorMaestro;
                RegimenCombo.DataTextField = "NombreRegimen";
                RegimenCombo.DataValueField = "IdAsignacionRegimenMaestro";
                RegimenCombo.DataBind();
            }

        }