private void cbSala_SelectedValueChanged(object sender, EventArgs e)
{
id_sala = cbSala.SelectedValue.ToString();
btnImprimir.Visible = true;
dgvAlumnosSala.Visible = true;
lblInfo.Visible = false;
dgvAlumnosSala.DataSource = logPersonas.ListaDocenteSala(id_sala);
this.dgvAlumnosSala.Columns["DOCENTE"].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleLeft;
this.dgvAlumnosSala.Columns["DOCUMENTO"].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;
this.dgvAlumnosSala.Columns["CELULAR"].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight;
this.dgvAlumnosSala.Columns["EMAIL"].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleLeft;
this.dgvAlumnosSala.Columns["DOMICILIO"].DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleLeft;
}