I've got a UltraWinGrid bound to a UltraDataSource.  I've used design-time to create the column/band layouts in the UltraDataSource.  The UltraWinGrid is design-time bound to the UltraDataSource.

In code in my LoadData() routine, I load the UltraDataSource row by row, band by band (one root band, one child band("Location")) like this:

      For Each t As RFATariff In Card.TariffList.Values
         Dim dr As UltraDataRow = dsPricing.Rows.Add

         dr("TariffKey") = t.TariffKey

         ... etc ...

         Dim LocationRows As UltraDataRowsCollection = dr.GetChildRows("Location")

         For Each l As RFALocation In t.LocationList.Values
            Dim ldr As UltraDataRow = LocationRows.Add

            ldr("LocationKey") = l.LocationKey
           ...etc...

         Next
      Next

      For Each c As UltraGridColumn In dgrPricing.DisplayLayout.Bands(0).Columns
         c.PerformAutoResize(PerformAutoSizeType.AllRowsInBand, True)
      Next

      For Each c As UltraGridColumn In dgrPricing.DisplayLayout.Bands("Location").Columns
         c.PerformAutoResize(PerformAutoSizeType.AllRowsInBand, True)
      Next

All this works fantastic.

My problem comes when I want to reload the form.

I tried dsPricing.Rows.Clear() but this cleans out the layout of the ultradatasource.... 

I hate it if I'm missing something simple, but how can I just clear out the datarows from the entire data source without resetting properties/settings at the same time?