public void SetSelectedListItem(ListBox lst, List<DBServerIPBind> source)        {            for (Int32 i = 0; i < source.Count; i++)            {                if (source[i].IsSelected)                {                    ListItem item = lst.Items.FindByValue(source[i].DataValueField);                    if (!object.Equals(item,null))                    {                        item.Selected = true;                    }                }            }        }