protected virtual void DoRefreshData()
{
int columnIndex = fPivot.GetColumnIndex(fColumnValues);
int rowIndex = fPivot.GetRowIndex(fRowValues);
if (columnIndex < 0 || rowIndex < 0)
{
drillDownView.DataSource = null;
}
else
{
drillDownView.DataSource = fPivot.CreateDrillDownDataSource(columnIndex, rowIndex);
}
drillDownView.PopulateColumns();
}