private void llenaGrilla()
 {
     try
     {
         var withBlock = dtgZonasAsignadas;
         withBlock.DataSource = ServicioGeneral.getEscala(1, 0, Convert.ToInt32(cboTipoCliente.SelectedValue), 0, "");
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }