private void btnthem_Click(object sender, EventArgs e)
{
using (quanlithucungEntities1 quanli = new quanlithucungEntities1())
{
DangNhap dn = quanli.DangNhaps.FirstOrDefault(p => p.UserName == user);
quanli.insertPN(dn.MaNV, cbncc.SelectedValue.ToString());
MessageBox.Show("Thêm thành công!");
FrmPhieuNhap_Load(sender, e);
}
}
