//Events private void btnTraCuu_Click(object sender, EventArgs e) { if (InputIsNull()) { MessageBox.Show("Từ khóa không hợp lệ!"); } else { if (this.selected == SELECTED.TenChuRe) { traCuu.key = txtTuKhoa.Text; dgvKetQuaTraCuu.DataSource = BUS_TraCuu.TraCuuTenChuRe(traCuu); //dgvKetQuaTraCuu.Refresh(); } else if (this.selected == SELECTED.TenCoDau) { traCuu.key = txtTuKhoa.Text; dgvKetQuaTraCuu.DataSource = BUS_TraCuu.TraCuuTenCoDau(traCuu); } else if (this.selected == SELECTED.SoDT) { traCuu.key = txtSoDT.Text; dgvKetQuaTraCuu.DataSource = BUS_TraCuu.TraCuuSoDT(traCuu); } else if (this.selected == SELECTED.Ngay) { traCuu.key = dtpNgay.Value.ToString("MM/dd/yyyy"); dgvKetQuaTraCuu.DataSource = BUS_TraCuu.TraCuuNgay(traCuu); //dgvKetQuaTraCuu.Columns["Ngày đãi tiệc"].DefaultCellStyle.Format = "dd/MM/yyyy"; } } }