private void DataGrid1_ItemDataBound(object sender,    System.Web.UI.WebControls.DataGridItemEventArgs e)
{
   if(e.Item.ItemType == ListItemType.Item || 
      e.Item.ItemType == ListItemType.AlternatingItem ||
      e.Item.ItemType == ListItemType.SelectedItem)
   {
        DataRowView row = (DataRowView)e.Item.DataItem;
        if(((string)row["CustomerID"]).StartsWith("A"))
               ((Label)e.Item.Cells[4].FindControl("lbIsA")).Text = "Y";
        else
           ((Label)e.Item.Cells[4].FindControl("lbIsA")).Text = "N";
   }
}