private void TileNhanSachMoi_Click(object sender, EventArgs e)
{
lblTitel_Click(sender, e);
GridViewDSS.Visible = true;
GridViewDSS.Location = new Point(250, 137);
GridViewDSS.Size = new Size(889, 333);
btnNhanSach.Visible = true;
btnNhanSach.Location = new Point(1155, 432);
btnCapNhat.Visible = true;
btnCapNhat.Location = new Point(1155, 387);
btnXoaSach.Visible = true;
btnXoaSach.Location = new Point(1155, 342);
btnEXDSS.Visible = true;
btnEXDSS.Location = new Point(1155, 297);
btnReportSach.Visible = true;
btnReportSach.Location = new Point(1155, 259);
lblTieuTeTabQL.Visible = true;
lblTieuTeTabQL.Text = "Nhận Sách Mới";
Class.XuLyThuVien KiemTra = new Class.XuLyThuVien();
GridViewDSS.DataSource = KiemTra.DataViewDanhSachSach();
}