Thanks.

I followed the second way. I have a comment_id column and based on it I am grouping the rows. But I have another requirement. I would make the end user copy the rows from one group into another group either by drag-drop or by normal copy-paste operations but both are failing.

As i discussed with you in another post, drag-drop is not functioning when group-by is applied nor I am unable to copy it using cut-paste operations. Let me post the code which i used for both.

Cut-Paste Operation

 Dim dRow As UltraGridRow = Nothing
        Select Case e.Tool.Key
            Case "Cut"
                SelRows = TryCast(LineItemsGrid.Selected.Rows, SelectedRowsCollection)
                For Each aRow As UltraGridRow In SelRows
                    aRow.Cells("Ar2l_CommentId").Value = 0
                Next
                If TypeOf ActiveControl Is UltraGrid Then
                    Clipboard.SetDataObject(LineItemsGrid.Selected.Rows)
                End If
            Case "Paste"
                If TypeOf ActiveControl Is UltraGrid Then
                    Dim oDataObject As IDataObject
                    oDataObject = Clipboard.GetDataObject()
                    If oDataObject.GetDataPresent("Infragistics.Win.UltraWinGrid.SelectedRowsCollection") Then
                        SelRows = CType(oDataObject.GetData("Infragistics.Win.UltraWinGrid.SelectedRowsCollection"), SelectedRowsCollection)
                    End If
                End If
                If SelRows.Count > 0 Then
                    Dim aUIElement As UIElement = LineItemsGrid.DisplayLayout.UIElement.ElementFromPoint(mousePoint)
                    If Not aUIElement Is Nothing Then
                        dRow = aUIElement.GetContext(GetType(UltraGridRow))
                    End If
                    For Each aRow As UltraGridRow In SelRows
                        aRow.Cells("Ar2l_CommentId").Value = dRow.Cells("Ar2l_CommentId").Value
                    Next
                    LineItemsGrid.DisplayLayout.Bands(0).SortedColumns.RefreshSort(True)
                    'LineItemsGrid.UpdateData()
                End If
        End Select

Here, I am unable to get the data(selected rows) back from the clipboard  during paste.

And Drag-Drop Code is

 'Private Sub LineItemsGrid_DragDrop(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles LineItemsGrid.DragDrop
    '    Dim dropIndex As Integer

    '    'Get the position on the grid where the dragged row(s) are to be dropped.
    '    'get the grid coordinates of the row (the drop zone)
    '    Dim uieOver As UIElement = LineItemsGrid.DisplayLayout.UIElement.ElementFromPoint(LineItemsGrid.PointToClient(New Point(e.X, e.Y)))

    '    'get the row that is the drop zone/or where the dragged row is to be dropped
    '    Dim ugrOver As UltraGridRow = TryCast(uieOver.GetContext(GetType(UltraGridRow), True), UltraGridRow)

    '    If ugrOver IsNot Nothing Then
    '        'index/position of drop zone in grid
    '        'band of the drop zone
    '        dstBand = ugrOver.Band
    '        dropIndex = ugrOver.Index
    '        'get the dragged row(s)which are to be dragged to another position in the grid
    '        Dim SelRows As SelectedRowsCollection = TryCast(DirectCast(e.Data.GetData(GetType(SelectedRowsCollection)), SelectedRowsCollection), SelectedRowsCollection)
    '        'get the count of selected rows and drop each starting at the dropIndex
    '        For Each aRow As UltraGridRow In SelRows
    '            'move the selected row(s) to the drop zone
    '            LineItemsGrid.Rows.Move(aRow, dropIndex)
    '            'aRow.Cells("Ar2l_CommentId").Value = LineItemsGrid.Rows(dropIndex).Cells("Ar2l_CommentId").Value
    '        Next
    '    End If
    'End Sub

In both cases I am trying to just update the comment_id of the selected rows so that they fall at the group where I am pasting it to or dragging it to.

Suggest me which one is a better one and help me out where I am going wrong.