public void display() { try { BindingSource bindingsource = new BindingSource(); List <DBPrepaidCards> rec = DBPrepaidCards.GetData(); foreach (DBPrepaidCards data in rec) { bindingsource.Add(data); } this.dataGridView_PrepaidCards.Refresh(); this.dataGridView_PrepaidCards.DataSource = bindingsource; } catch (Exception ex) { ex.ToString(); } }