private void btnSua_Click(object sender, EventArgs e)
 {
     kt = false;
     openControl();
     txtMaPhieuDK.Enabled = false;
     btnThem.Enabled      = false;
     btnXoa.Enabled       = false;
     ENTITY.PhieuDangKy        pkd = new ENTITY.PhieuDangKy(txtMaPhieuDK.Text.Trim(), txtMaKH.Text.Trim(), txtMaNV.Text.Trim(), dtNgayLap.Value, dtNgayDi.Value, txtMaPhong.Text.Trim(), txtTraTruoc.Text.Trim(), txtDonVi.Text.Trim());
     DAL.PhieuDangKy_Controler p   = new DAL.PhieuDangKy_Controler();
     p.EditPhieuDangKy(pkd);
     showLsvPKD();
 }
 private void btnLuu_Click(object sender, EventArgs e)
 {
     lockControl();
     ENTITY.PhieuDangKy        pkd = new ENTITY.PhieuDangKy(txtMaPhieuDK.Text.Trim(), txtMaKH.Text.Trim(), txtMaNV.Text.Trim(), dtNgayLap.Value, dtNgayDi.Value, txtMaPhong.Text.Trim(), txtTraTruoc.Text.Trim(), txtDonVi.Text.Trim());
     DAL.PhieuDangKy_Controler p   = new DAL.PhieuDangKy_Controler();
     if (kt == true)
     {
         p.insertPhieuDangKy(pkd);
     }
     showLsvPKD();
     resetControl();
 }