private void dgv_sach_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e) { bt_timkiem.Enabled = false; bt_them.Enabled = true; bt_capnhat.Enabled = true; bt_xoa.Enabled = true; bt_capnhat.Enabled = true; tb_gianhapden.Enabled = false; tb_giaxuatden.Enabled = false; tb_ma.Enabled = false; string i = dgv_sach.Rows[e.RowIndex].Cells[1].Value.ToString(); int id = Convert.ToInt16(i); var res = SachService.GetBookById(id); tb_ma.Text = res.ma.ToString(); tb_ten.Text = res.ten; tb_mota.Text = res.mota; tb_gianhap.Text = res.gianhap.ToString(); tb_giaxuat.Text = res.giaxuat.ToString(); cb_nhaxb.SelectedValue = res.nhaxb.id; cb_danhmuc.SelectedValue = res.cat.id; if (res.img != null) { img = res.img; pictureBox1.Image = byteArrayToImage(res.img); pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage; } }