ItemdataBound()
{
if (e.Item is GridDataItem)
{
GridDataItem item = (GridDataItem)e.Item;
int index = item.ItemIndex;
if (index == 4) // set your index here
{
item["ColumnUNiqueName"].Text = "Your text come here";
}
}
}
if this is not your case then elaborate your case.
let me know if any concern.