Spark Get Partial View Html

Question

I am using the following code to render a spark view into Html. This works fine when the page doesn't contain any web form elements. Specifically is fails on #Html.BeginForm in a template file. I also noticed that the view has a null value for the request and response properties, even though the controller I am passing has them in the descriptor.

    public static string GetPartialViewHtml(ControllerBase controller, ViewDataDictionary viewData, string viewRalativePath)
    {
        SparkViewFactory f = (SparkViewFactory)ViewEngines.Engines.First(e => e is SparkViewFactory);
        IList<string> l = new List<string>();
        SparkViewDescriptor d = f.CreateDescriptor(controller.ControllerContext, "logon", null, false, l);
        SparkView view = (SparkView)f.Engine.CreateInstance(d);
        view.ViewData = viewData;
        StringWriter writer = new StringWriter();
        view.RenderView(writer);
        return writer.ToString();
    } 

Is there any way I can get this to work?

Phil