public void byMonth() { lsvGeneralReport.Items.Clear(); ReceiptDao r = new ReceiptDao(); PaymentDao p = new PaymentDao(); var incomes = r.GetReceiptList(); for (int i = 1; i <= 12; i++) { if (i >= 10) { string[] rows = { "Tháng " + i, "" + r.GetByMonth(i.ToString()), "" + p.GetByMonth(i.ToString()), (r.GetByMonth(i.ToString()) - p.GetByMonth(i.ToString())).ToString() }; ListViewItem item = new ListViewItem(rows); lsvGeneralReport.Items.Add(item); } else { string[] rowss = { "Tháng " + i, "" + r.GetByMonth("0" + i.ToString()), "" + p.GetByMonth("0" + i.ToString()), (r.GetByMonth("0" + i.ToString()) - p.GetByMonth("0" + i.ToString())).ToString() }; var item = new ListViewItem(rowss); lsvGeneralReport.Items.Add(item); } } }