Use the ItemDataBound event to customize the DataGrid control.

<script runat="server">
  void Item_Bound(Object sender, DataGridItemEventArgs e)
      {
 
            if((e.Item.ItemType == ListItemType.Item) ||
             (e.Item.ItemType == ListItemType.AlternatingItem))
         {
 
            // Retrieve the text of the CurrencyColumn from the DataGridItem
            // and convert the value to a Double.
            string Remark = e.Item.Cells[1].Text;

    // Format the value as another style and redisplay it in the DataGrid.
   if (Remark.Length >2) {e.Item.Cells[1].Text = Remark.Substring(0,2) + "...";}

   else {e.Item.Cells[1].Text = Remark;}        
         }        
 
      }
</script>

OnItemDataBound="Item_Bound"      :add this words to a datagrid control to modify it's row