Great... Achieved what I expected...Thanks Mike Saltzman

This is more complicated, you can't do it via property settings.

You can stop the rows from expanding like so:

        private void ultraGrid1_BeforeRowExpanded(object sender, CancelableRowEventArgs e)
        {
            UltraGridGroupByRow row = e.Row as UltraGridGroupByRow;
            if (row != null && row.Column.Key == "Session")
                e.Cancel = true;
        }

To remove the Expansion indicators on just the second level GroupByRows, you will need a CreationFilter.

        public class MyCreationFilter : IUIElementCreationFilter
        {
            #region IUIElementCreationFilter Members

            void IUIElementCreationFilter.AfterCreateChildElements(UIElement parent)
            {
                // Watch for a GroupByRowUIElement
                if (parent is GroupByRowUIElement)
                {
                    // Get the UltraGridGroupByRow
                    UltraGridGroupByRow row = parent.GetContext(typeof(UltraGridGroupByRow)) as UltraGridGroupByRow;
                    if (row != null && row.Column.Key == "Session")
                    {
                        // Find the GroupByRowExpansionIndicatorUIElement inside the element. 
                        GroupByRowExpansionIndicatorUIElement groupByRowExpansionIndicatorUIElement = parent.GetDescendant(typeof(GroupByRowExpansionIndicatorUIElement)) as GroupByRowExpansionIndicatorUIElement;
                        if (groupByRowExpansionIndicatorUIElement != null)
                        {
                            // Remove the expansion indicator element. 
                            parent.ChildElements.Remove(groupByRowExpansionIndicatorUIElement);

                            // Shift the text over to the left to reclaim the space left by the expansion indicator. 
                            GroupByRowDescriptionUIElement groupByRowDescriptionUIElement = parent.GetDescendant(typeof(GroupByRowDescriptionUIElement)) as GroupByRowDescriptionUIElement;
                            groupByRowDescriptionUIElement.Rect = new Rectangle(
                                groupByRowDescriptionUIElement.Rect.X - groupByRowExpansionIndicatorUIElement.Rect.Width,
                                groupByRowDescriptionUIElement.Rect.Y,
                                groupByRowDescriptionUIElement.Rect.Width + groupByRowExpansionIndicatorUIElement.Rect.Width,
                                groupByRowDescriptionUIElement.Rect.Height);
                        }
                    }
                }
            }

            bool IUIElementCreationFilter.BeforeCreateChildElements(UIElement parent)
            {
                // do nothing. 
                return false;
            }

            #endregion
        }

Hi,

I am grouping by two levels, one is session level and another is payment method level. If I set GroupByRowExpansionStyle to Disabled then entire group expansion style get disabled. User can able to expand the row by sessionlevel not the payment method level. Is there way to handle this scenario?

The output  looks like

Session Name
-------------------------
- Session - 1
   Method:Cash (2 Items) Amount Paid = $170
   Method:Cheque (2 Items) Amount Paid = $100

- Session - 2
   Method:Cash (2 Items) Amount Paid = $170  

+ Session - 3   

Hi,

There's no way to hide the data rows and still show the GroupByRows.But you can stop them from expanding.

What you do is set grid.DisplayLayout.Override.GroupByRowExpansionStyle to Disabled.

Then you handle the InitializeGroupByRow event and set e.Row.Expanded to False.

This way, all GroupByRows are collapsed and the user cannot expand them.

I tried what you suggested,  summary information is displaying in the group by row, but still Non-Group by rows are displaying below the group by rows.

- Session - 1
    - Method: Cash(2 items) Amount Paid = $170.00
           100.0000  - Need to hide
           70.0000  - Need to hide
    - Method: Cheque(1 item) Amount Paid = $50.00
           50

- Session - 2
    - Method: Cash(1 item) Amount Paid = $500.00
           500.00  - Need to hide

I want to hide non-group by rows, that is 100, 70 in cash method and 50 in cheque method.