public FormChamCong()
        {
            InitializeComponent();
            List <PHAN_CA> pcs = PhanCa.LayCaLamViec(Init.nhanVien.MSNV, Convert.ToDateTime(DateTime.Now.ToShortDateString()));

            Console.WriteLine(pcs.Count);
            for (int i = 0; i < pcs.Count; i++)
            {
                flowLayoutPanel1.Controls.Add(new PanelCong(pcs[i]));
            }
        }
        public void TimCa(int msnv, DateTime tu, DateTime den)
        {
            flowPanel.Controls.Clear();
            List <PHAN_CA> pc = PhanCa.LayCaLamViec(msnv, tu, den);

            for (int i = 0; i < pc.Count; i++)
            {
                if (pc[i].CHAM_CONG == 1)
                {
                    flowPanel.Controls.Add(new PanelXacNhanCong(pc[i]));
                }
            }
        }