Download File using DirectEvent (MVC)

[dnakorea]

I have problem download file using DirectEvent in mvc (asp.net core mvc page)

Error message is "BADRESPONSE: Invalid or unexpected token"

"K�zR\ ���,
xl/workbook.xml���N�0E%�3�2�ڎ�� v��I��5�S%��� �¿½×–ݱ�e�;���7Ê …���kZ0$.y�� 78N�ֿ�|~M�lê½”~aV]{k��)bi�JR��rD�c>Ù� �fB_f"��ݷmg#����� �¿½ï¿½�4��bdi�sÍž| �{����;��[Ow�C�6��1J!���� �¿½.�D��2-��}�y-`�4�?��?ͧPK�zRx >nY% ���"

[cshtml page code]

<ext-button tooltip="Excel Download" iconCls="fal fa-cloud-download" variant="Warning">
<directEvents>
  <click  actionName="dataDownload" method="POST">
   <eventMask>
    <ext-eventMask showMask="true" msg="@localizer["textSaving..."].Value" />
   </eventMask>
   <extraParams>
   <ext-add key="paramA" value="App.comboA.getValue()" mode="Raw" />
   <ext-add key="paramB" value="App.comboB.getValue()" mode="Raw" />
   </extraParams>
  </click>

  </directEvents>
 </ext-button>