See my initial post and the one above yours - that was and is the event and code I'm using.

Here (I think) is the issue. The AfterRowExpanded event fires BEFORE the child rows are populated. So when the PerformAutoResize is done there is no data to size with.

If I run the code in the AfterRowExpanded event, child rows are sized to their headers.

If I hook up a button to call the same code iterating the columns and resizing after the rows are displayed it sizes the rows correctly using data and headers (AutoResizeColumnWidthOptions.All).

I have the right code but I need to use an event AFTER the child rows are populated. What event could I use? I don't want InitializeRow because that would resize the columns over and over for every row displayed - a performance hit.

Hello,

Have you tried AfterRowExpanded event ? Does this event works for you ?

I am waiting for your feedback.

Interesting ...

My code is like this ... bands(1) is of course the child band.

You are explcitly setting the width of the columns, whereas I was looking at the data to size with. I don't want to try and predefine column widths, I want them dynamically resized.

        Dim band As UltraGridBand = TsHeaderUltraGrid.DisplayLayout.Bands(1)

        Dim column As UltraGridColumn

        For Each column In band.Columns ' Timesheet_DetailUltraGrid.DisplayLayout.Bands(0).Columns

            column.PerformAutoResize(PerformAutoSizeType.VisibleRows, AutoResizeColumnWidthOptions.All)
            Debug.WriteLine("Column " & column.FormulaAbsoluteName & " " & column.Width)

        Next

        TsHeaderUltraGrid.Refresh()