export to excel from ajax request asp.net MVC kendo UI - asp.net

Question

I am working on a asp.net MVC with kendo UI.
I want a custom button to install the data from a specific date into Excel.
I cannot use the ".Excel" in the grid because I need to filter the data before I install them.
I tried to connect to a method with ajax request:
toolbar.Template(
#<div>
<label>#WebResources.LogFilterText</label>
#(Html.Kendo().DatePicker()
.Name("datepicker")
.Value(DateTime.Today)
.Format("dd.MM.yyyy")
)
#(Html.Kendo().Button()
.Name("excelButton")
.Events(e => e.Click("getExcel"))
.Content("To Excel")
)
</div>
)
this is the javscript function:
function getExcel() {
var url = '/LogAdmin/GetExcel/';
$.ajax({
url: url,
data: { id: kendo.toString($("#datepicker").data("kendoDatePicker").value(), "dd.MM.yyyy") }, //parameters go here in object literal form
type: 'GET',
datatype: 'json',
success: function (data) {
alert("da");
$("#test").html(data);
},
error: function () { alert("Error has been accured."); }
});
}
and here is the controller method:
public ActionResult GetExcel([Bind(Prefix = "id")] string date)
{
// result is a valid list from Linq.
GridView gridview = new GridView();
gridview.DataSource = result;
gridview.DataBind();
// Clear all the content from the current response
Response.ClearContent();
Response.Buffer = true;
// set the header
Response.AddHeader("content-disposition", "attachment; filename = itfunda.xls");
Response.ContentType = "application/ms-excel";
Response.Charset = "";
// create HtmlTextWriter object with StringWriter
using (StringWriter sw = new StringWriter())
{
using (HtmlTextWriter htw = new HtmlTextWriter(sw))
{
// render the GridView to the HtmlTextWriter
gridview.RenderControl(htw);
// Output the GridView content saved into StringWriter
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
}
}
return View();
}
I do not get an error, and I receive an html table. if I show it on a div then it looks a like a correct table.
but how to save it to excel? anybody can help me?