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Sorting on datagridview column loses the backcolor of the selected rows

Last Modified: 2012-05-09
I have programmatic sorting on datagridview columns and the code is :

    Private Sub SortDgColumn(ByVal sender As Object, ByVal intColindex As Integer, ByVal DoSorting As Boolean)
        'Dosorting is flag to allow descending sorting on the grid columns this is used for Resetting or Selecting all fields as the datagridview should not sort if the selection column is not sorted.
        Dim int As Integer
        int = intColindex

        Me.Cursor = Cursors.WaitCursor
        Dim newColumn As DataGridViewColumn = _
        Dim oldColumn As DataGridViewColumn = sender.SortedColumn

        Dim direction As ListSortDirection
        ' If oldColumn is null, then the DataGridView is not currently sorted.
        If Not oldColumn Is Nothing Then

            ' Sort the same column again, reversing the SortOrder.
            If oldColumn Is newColumn AndAlso sender.SortOrder = _
                SortOrder.Ascending Then
                If DoSorting = True Then direction = ListSortDirection.Descending
                ' Sort a new column and remove the old SortGlyph.
                direction = ListSortDirection.Ascending
                oldColumn.HeaderCell.SortGlyphDirection = SortOrder.None
            End If
            direction = ListSortDirection.Ascending
        End If
        ' Sort the selected column.
        If IsNothing(sender.CurrentRow) Then Exit Sub

        sender.Sort(newColumn, direction)
        If direction = ListSortDirection.Ascending Then
            newColumn.HeaderCell.SortGlyphDirection = SortOrder.Ascending
            If DoSorting = True Then newColumn.HeaderCell.SortGlyphDirection = SortOrder.Descending
        End If
        Me.Cursor = Cursors.Default

    End Sub

But as soon as I sort a column I lose all the selected rows backcolor.
Any suggestions on how can I retain it?

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