private void Search_KhachHang(String timkiem) { DataTable khachhang = bus_khachhang.BangKhachHang(); DataView dataView_khachhang = new DataView(khachhang); try { int makh = Int32.Parse(timkiem); dataView_khachhang.RowFilter = String.Format("Makh = {0}", makh); dgvKhachHang.DataSource = dataView_khachhang; BuocDlVaoCacDieuKhien_KhachHang(); } catch (FormatException ex) { dataView_khachhang.RowFilter = String.Format("hoten like '%{0}%'", timkiem); dgvKhachHang.DataSource = dataView_khachhang; BuocDlVaoCacDieuKhien_KhachHang(); } }