Export Grid.Mvc to Excel

Question

---------------- view page-----

  <div class="scroll" id="activity">
    @Html.Grid(Model).Named("x").Columns(columns => {
    }
  </div>

---------java script---------

  $("#excelbtn").click(function (e) {
    window.open('data:application/vnd.ms-excel,' + encodeURIComponent($('#activity').html()));
    e.preventDefault();

  });

but it exports only one page of data.

I want all data to export at once.