private void btnLuu_Click(object sender, EventArgs e) { en_nv.TenNV = txtTennv.Text; en_nv.GT = cboGt.Text; en_nv.DiaChi = txtDiachi.Text; en_nv.SDT = txtSdt.Text; en_nv.TenDangNhap = txtTendn.Text; en_nv.MatKhau = txtMk.Text; if (them == true) { if (txtManv.Text != "") { try { en_nv.MaNV = con.SinhMa("NHANVIEN", "NV"); nv.ThemNhanVien(en_nv); } catch (Exception ex) { MessageBox.Show(ex.Message); } } else { MessageBox.Show("ban chua nhap manv"); } } else { try { en_nv.MaNV = txtManv.Text.ToString(); nv.SuaNhanVien(en_nv); } catch (Exception ex) { MessageBox.Show(ex.Message); } } khoadk(); dgvNhanvien.DataSource = nv.HienThiNhanVien(""); gannull(); }