private void txtShipmentNo_KeyDown(object sender, KeyEventArgs e) { if (String.IsNullOrEmpty(txtShipmentNo.Text) || String.IsNullOrWhiteSpace(txtShipmentNo.Text)) { return; } if (e.KeyData == Keys.Tab || e.KeyData == Keys.Enter) { lblShipmentNo.Text = txtShipmentNo.Text; shipment = _repositoryShipment.GetShipmentOut(txtShipmentNo.Text.Trim().ToUpper()); if (shipment != null) { FillForm(shipment); } else { MessageBox.Show("Không tìm thấy đơn hàng vừa nhập", "Không tìm thấy", MessageBoxButtons.OK, MessageBoxIcon.Information); } txtShipmentNo.Text = ""; } }