private void btnCapNhat_Click(object sender, EventArgs e)
        {
            if (ctrl.KiemTra(txtMa, txtTen))
            {
                btnThem.Enabled = true;
                btnXoa.Enabled  = true;
                btnSua.Enabled  = true;

                btnCapNhat.Enabled = false;
                btnBoQua.Visible   = false;

                dataDSQuocTich.Enabled = false;

                QuocTichInfo qt = new QuocTichInfo();
                qt.MaQuocTich  = Convert.ToInt32(txtMa.Text);
                qt.TenQuocTich = txtTen.Text;

                if (Updating)
                {
                    ctrl.Sua(qt);
                }
                else
                if (Adding)
                {
                    ctrl.Them(qt);
                }

                ctrl.LayDSQuocTich(dataDSQuocTich);

                txtMa.Enabled  = false;
                txtTen.Enabled = false;
            }
        }
        private void btnThem_Click(object sender, EventArgs e)
        {
            //Kiem Tra tai day
            if (SVCtrl.KiemTra(txtHoTen, dateNgaySinh, txtDiaChi, txtMSSV, txtCMND, txtDienThoai, cmbQuocTich, cmbDanToc, cmbTonGiao))
            {
                SinhVienInfo SV = new SinhVienInfo();
                SV.CamTinhDang = chkCamTinhDang.Checked;
                SV.SoCMDN      = txtCMND.Text;
                SV.DangVien    = chkDangVien.Checked;

                DanTocInfo dantoc = new DanTocInfo();
                dantoc.MaDanToc  = (int)cmbDanToc.SelectedValue;
                dantoc.TenDanToc = cmbDanToc.Text;
                SV.DanToc        = dantoc;

                SV.DiaChi    = txtDiaChi.Text;
                SV.DienThoai = txtDienThoai.Text;
                SV.DoanVien  = chkDoanVien.Checked;
                SV.GioiTinh  = chkGioiTinh.Checked;
                SV.HoTen     = txtHoTen.Text;
                SV.MaKTX     = txtMaKTX.Text;
                SV.MSSV      = txtMSSV.Text;
                SV.Namsinh   = dateNgaySinh.Value;

                QuocTichInfo quoctich = new QuocTichInfo();
                quoctich.MaQuocTich  = (int)cmbQuocTich.SelectedValue;
                quoctich.TenQuocTich = cmbQuocTich.Text;
                SV.QuocTich          = quoctich;

                TonGiaoInfo tongiao = new TonGiaoInfo();
                tongiao.MaTonGiao  = (int)cmbTonGiao.SelectedValue;
                tongiao.TenTonGiao = cmbTonGiao.Text;
                SV.TonGiao         = tongiao;
                if (picHinh.ImageLocation == null)
                {
                    SV.HinhAnh = "";
                }
                else
                {
                    SV.HinhAnh = picHinh.ImageLocation.ToString();
                }

                IEnumerator ds = listDSThanNhan.Items.GetEnumerator();
                while (ds.MoveNext())
                {
                    ListViewItem item = (ListViewItem)ds.Current;
                    ThanNhanInfo tn   = (ThanNhanInfo)item.Tag;// (ThanhNhanInfo)item.Tag;
                    tn.SinhVien = SV;
                    SV.DSThanNhan.Add(tn);
                }

                ListViewItem row = new ListViewItem();
                row.Text = SV.HoTen;
                row.SubItems.Add(SV.GioiTinh == true?"Nam":"Nữ");
                row.Tag = SV;
                listSinhVien.Items.Add(row);


                //Xoa Du Lieu tren Form
                txtCMND.Text           = "";
                txtDiaChi.Text         = "";
                txtDienThoai.Text      = "";
                txtHoTen.Text          = "";
                txtHoTen.Text          = "";
                txtMaKTX.Text          = "";
                txtMSSV.Text           = "";
                chkCamTinhDang.Checked = false;
                chkDangVien.Checked    = false;
                chkDoanVien.Checked    = false;
                chkGioiTinh.Checked    = false;

                listDSThanNhan.Items.Clear();//Xóa ListView DS Thân nhân

                ///Lay MSSV tu dong
                txtMaKTX.Text = SVCtrl.LayMaKTXTuDanhSach(listSinhVien);
                picHinh.Image = null;
            }
        }