Rowspan in GridView ( VB.Net )

Private Sub GridView1_PreRender(sender As Object, e As EventArgs) Handles GridView1.PreRender         MergeRowsWithSameContent(sender) End Sub Public Sub MergeRowsWithSameContent(gvw As GridView)         For rowIndex As Integer = gvw.Rows.Count - 2 To 0 Step -1             Dim row As GridViewRow = gvw.Rows(rowIndex)             Dim previousRow As GridViewRow = gvw.Rows(rowIndex + 1)             For i As Integer = 0 To row.Cells.Count - 1                 If row.Cells(i).Text = previousRow.Cells(i).Text Then                     row.Cells(i).RowSpan = If(previousRow.Cells(i).RowSpan < 2, 2, previousRow.Cells(i).RowSpan + 1)                     previousRow.Cells(i).Visible = False`                 End If             Next         Next End Sub

(Ref: http://stackoverflow.com/questions/11129762/how-to-implement-rowspan-in-a-gridview-for-net-3-5)