//GetExistingUploadMediaDetails
public ActionResult Export(DateTime? StartDate, DateTime? EndDate, string PortfolioOwner, string Responsibility, string Account, string GUID)
{
Response.AddHeader("Content-Type", "application/vnd.ms-excel");
var dataQueries = new DataQueries();
IEnumerable<MediaViewEditResult> results = dataQueries.GetMediaViewEditRecordsExport(StartDate, EndDate, PortfolioOwner, Responsibility, Account, GUID);
//return View();
return PartialView("Export", results.ToList());
}