I create and populate UltraDataSource in code that has about 100-200 bands and about 3k of items on various levels. I need to disable column headers on most of the bands but ran into a problem. If I assign my ultraDataSource to grid's DataSource before my data source is populated it takes forever to populate. If I assign it after my datasource is populated grid loads very fast but I can't do myGrid.DisplayLayout.Bands[bandID].ColHeadersVisible = false; while populating because grid doesn't know about my datasource yet. I tried using myGrid.BeginUpdate(); and myGrid.SuspendRowSynchronization(); hoping it would do the trick but no banana. I guess I can iterate bands after datasource is populated and assigned to the grid's datasource but hoping there is an easier way.