Hi Anton,

You have to do some method which will render Partial view in string.

return Json(new { htmlData = RenderRazorViewToString("partialView Path", model, ControllerContext, ViewData, TempData) }, JsonRequestBehavior.AllowGet);


    public static string RenderRazorViewToString(string viewName, object model, ControllerContext controllerContext, ViewDataDictionary viewData, TempDataDictionary tempData)
    {
        viewData.Model = model;
        using (var sw = new StringWriter())
        {
            var viewResult = ViewEngines.Engines.FindPartialView(controllerContext, viewName);
            var viewContext = new ViewContext(controllerContext, viewResult.View, viewData, tempData, sw);
            viewResult.View.Render(viewContext, sw);
            viewResult.ViewEngine.ReleaseView(controllerContext, viewResult.View);
            return sw.GetStringBuilder().ToString();
        }
    }

Thanks, Alex