public static CTHD getInstance() { if (instance == null) { instance = new CTHD(); } return(instance); }
private void myListViewHistory_ItemClick(object sender, EventArgs e) { //id of customer who are clicked in table string id = this.listviewHistoryBuy.SelectedItems[0].SubItems[1].Text; billDetails = BillController.GetBillDetailsByBillID(id); CTHD.getInstance().SetBillDetails(billDetails); CTHD.getInstance().LoadInfo(); CTHD.getInstance().Show(); }