How to convert a view to string in the controller?

I would like to convert this view to string and have the value in string in my controller

The problem is that I would like it to execute an excerpt of script that is in this view

The current method I have, just converts, without executing the script that is in that view Currently it looks like this:

  public static string PartialViewToString(this Controller controller, string viewName, object model)
    {
      if (string.IsNullOrEmpty(viewName))
      {
        viewName = controller.ControllerContext.RouteData.GetRequiredString("action");
      }

      controller.ViewData.Model = model;

      using (StringWriter stringWriter = new StringWriter())
      {
        ViewEngineResult viewResult = ViewEngines.Engines.FindPartialView(controller.ControllerContext, viewName);
        ViewContext viewContext = new ViewContext(controller.ControllerContext, viewResult.View, controller.ViewData, controller.TempData, stringWriter);
        viewResult.View.Render(viewContext, stringWriter);
        return stringWriter.GetStringBuilder().ToString();
      }
    }

In my controller I call:

var htmlString = helper.PartialViewToString(this,"NomeView",model);