/// <summary>
/// Asigna el objeto principal al origen de datos
/// <returns>void</returns>
/// </summary>
protected override void RefreshMainData()
{
_original_table = new DataTable();
CustomAdapter custom = new CustomAdapter();
custom.FillFromReader(_original_table, _reader);
_pivoted_table = PivotTable.GetDataTable(_original_table);
Precios_Tabla.DataSource = _pivoted_table;
}