private void CurrencyView_CellValueChanged(object sender, CellValueChangedEventArgs e)
 {
     if (CurrencyView.GetFocusedDataRow()["Rus"].ToString() == "" || CurrencyView.GetFocusedDataRow()["Currency"].ToString() == "")
     {
         lb_status.Text = "Ошибка: Вы оставили пустое поле!";
     }
     else
     {
         DataSaver ds = new DataSaver(login_, password_);
        lb_status.Text = ds.CurrencyCursFill(CurrencyView.GetFocusedDataRow());
     }
 }