private void btnTraSach_Click(object sender, EventArgs e) { SachService s = new SachService(); int MaKH = Convert.ToInt32(txtMaKH_TraSach.Text); int MaSach = Convert.ToInt32(txtMaSach_TraSach.Text); try { s.TraSach(MaKH, MaSach); MessageBox.Show("Trả sách thành công"); } catch (Exception ex) { MessageBox.Show("Lỗi trả sách"); } List <ThueSach> lstDaTra = s.GetThueSachDaTra(); lvwDanhSachTra.Items.Clear(); foreach (ThueSach thuesach in lstDaTra) { ListViewItem item = new ListViewItem(); item.SubItems.Add(thuesach.MaKhachHang.ToString()); item.SubItems.Add(thuesach.MaSach.ToString()); item.SubItems.Add(thuesach.NgayThue.ToShortDateString()); item.SubItems.Add(thuesach.NgayTra.ToShortDateString()); item.SubItems.Add(thuesach.TinhTrang.Equals("1") ? "Chưa trả" : "Đã trả"); lvwDanhSachTra.Items.Add(item); } }