mvc ajax begin form and renderpartial validation open - partial-views

Question

ı am using a view in ajax begin form. ı search one thing and result is correct then alert not render the partial view. but it isnt render correct view a blank page and a see my partial view. thanks
my view
#using (Ajax.BeginForm("AjazKullanici", new AjaxOptions { UpdateTargetId = "trBilgiler", HttpMethod = "Post" }))
{
<tr>
<td style="width: 20%">
T.C. Kimlik No :
</td>
<th align="left">
#Html.TextBoxFor(model => model.TcNo)
#Html.ValidationMessageFor(model => model.TcNo)
<input type="submit" id="btnBilgiGetir" value="Bilgi Getir" class="Button" width="75px" />
</th>
</tr>
}
<tr id="trBilgiler">
#{Html.RenderPartial("BilgilerKullanici");}
</tr>
my controller
public ActionResult AjazKullanici()
{
ViewData["dropGizliSoru"] = _db.EHASTANEGIZLISORUs;
return View();
}
[HttpPost]
public PartialViewResult AjazKullanici(YeniKullaniciModel model)
{
if (model.TcNo != null)
{
var userKontrol = _db.KULLANICIBILGILERIs.Where(x => x.KULLANICIKOD == model.TcNo);
if (userKontrol.Any())
{
Response.Write("<script langauge='javascript'>alert('Girmiş Olduğunuz T.C. Kimlik Numarasına Ait Kullanıcı Kaydı Vardır.')</script>");
return PartialView();
}
else
{
return PartialView("BilgilerKullanici",model);
}
}
return PartialView();
}