private void btnActualizar_Click(object sender, EventArgs e)
        {
            try
            {
                ClsDMatricula matricula          = new ClsDMatricula();
                Matricula     modificarMatricula = new Matricula();

                modificarMatricula.matriculaId     = (Convert.ToInt32(txtIdMatricula.Text));
                modificarMatricula.alumnoFk        = (Convert.ToInt32(txtFkAlumno.Text));
                modificarMatricula.gradoFk         = Convert.ToInt32(cbxGrado.SelectedValue.ToString());
                modificarMatricula.seccionFk       = Convert.ToInt32(cbxSeccion.SelectedValue.ToString());
                modificarMatricula.nombreMatricula = txtNombreMatricula.Text;



                matricula.modificarMatricula(modificarMatricula);


                Carga();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error" + ex);
            }
        }
        private void btnEliminar_Click(object sender, EventArgs e)
        {
            try
            {
                ClsDMatricula matricula = new ClsDMatricula();
                matricula.eliminarMatricula(Convert.ToInt32(txtIdMatricula.Text));
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error" + ex);
            }

            Carga();
            clear();
        }
        private void btnRegistrar_Click(object sender, EventArgs e)
        {
            try {
                ClsDMatricula matricula        = new ClsDMatricula();
                Matricula     guardarMatricula = new Matricula();

                guardarMatricula.alumnoFk               = Convert.ToInt32(txtFkAlumno.Text);
                guardarMatricula.gradoFk                = Convert.ToInt32(cbxGrado.SelectedValue.ToString());
                guardarMatricula.seccionFk              = Convert.ToInt32(cbxSeccion.SelectedValue.ToString());
                guardarMatricula.nombreMatricula        = txtNombreMatricula.Text;
                guardarMatricula.fechaRegistroMatricula = DateTime.Now.Date;

                matricula.guardarMatricula(guardarMatricula);
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error" + ex);
            }
            Carga();
            //clear();
        }