private void btnTimKiem_Click(object sender, EventArgs e) { if (txtTimKiem.Text.Trim() != "") { int value = 0; bool isNumber = int.TryParse(txtTimKiem.Text, out value); if (cbbTimKiem.SelectedIndex == 0) { dgvDanhSachHoaDon.DataSource = hoadonController.SearchMaHoaDon(value); } else if (cbbTimKiem.SelectedIndex == 1) { int day, month, year; string[] array = txtTimKiem.Text.Split('/'); if (array.Length == 3) { if (int.TryParse(array[0], out day) && int.TryParse(array[1], out month) && int.TryParse(array[2], out year)) { DateTime date = new DateTime(year, month, day); dgvDanhSachHoaDon.DataSource = hoadonController.SearchNgayLap(date); } } } else if (cbbTimKiem.SelectedIndex == 2) { } else if (cbbTimKiem.SelectedIndex == 3) { dgvDanhSachHoaDon.DataSource = hoadonController.SearchTenKhachHang(txtTimKiem.Text); } } else { load(); } }