Protected Sub myDatagrid_DataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs) Handles myDatagrid.DataBound
  If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then
    Dim rv As DataRowView = (DataRowView)e.Item.DataItem;
    Dim rimanenza As Integer = Convert.ToInt32(rv.Row.ItemArray[1]);
    If rimanenza < 20 Then
      e.Item.Cells[4].BackColor = Color.Red;
    End If
  End If
End Sub