Export to excel from web site - responsive web page

I am giving .xls file format and the device has quick office installed!! When I click on "Export" button its showing the downloading in progress bar and shuttingdown itself without completing it.

This is the piece of code I had written inside the "Export" button click event whick works well in Desktop.

GridView gv = new GridView();
List<reportmodel> listOfReports = new List<reportmodel>();

listOfReports = UML.getReports(TempData["fromDate"].ToString(), TempData["toDate"].ToString(), user.role);

var reports = listOfReports.Select(x => new { input,output }).ToList();
gv.DataSource = reports;
gv.DataBind();
Response.ClearContent();
Response.Buffer = true;
Response.BufferOutput = true;
Response.ContentType = "application/vnd.ms-excel";
Response.AppendHeader("content-disposition", "attachment; filename=Reports.xls");
Response.ContentType = "application/ms-excel";
Response.Charset = "";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
gv.RenderControl(htw);
Response.Output.Write(sw.ToString());
Response.Flush();
Response.End();
// return Redirect();
return RedirectToAction("Reports");

And I have tried various content type "application/ms-excel","application/octet-stream". no luck :(