asp mvc view to string

AspMvcViewToString.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Mvc;
using System.Web.Mvc.Html;
using System.Web;
using System.IO;

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

            controller.ViewData.Model = model;

            using (var sw = new StringWriter())
            {
                var viewResult = ViewEngines.Engines.FindPartialView(controller.ControllerContext, viewName);
                var viewContext = new ViewContext(controller.ControllerContext, viewResult.View, controller.ViewData, controller.TempData, sw);
                viewResult.View.Render(viewContext, sw);

                return sw.GetStringBuilder().ToString();
            }
        }

	/// <summary>
	/// http://stackoverflow.com/questions/483091/render-a-view-as-a-string
	/// or http://www.klopfenstein.net/lorenz.aspx/render-partial-view-to-string-in-asp-net-mvc
	/// </summary>
	/// <remarks>
	/// use it in controller this.RenderViewToString("View", Model)
	/// </remarks>
	public static class ViewToString
	{
		/// <summary>Renders a view to string.</summary> 
		public static string RenderPartialToString(this HtmlHelper html, string viewName, object viewData)
		{
			return RenderViewToString(html.ViewContext.Controller.ControllerContext, viewName, viewData);
		}
		/// <summary>Renders a view to string.</summary> 
		public static string RenderViewToString(this Controller controller, string viewName, object viewData)
		{
			return RenderViewToString(controller.ControllerContext, viewName, viewData);
		}

		private static string RenderViewToString(ControllerContext context,
															 string viewName, object viewData)
		{
			//Create memory writer 
			var sb = new StringBuilder();
			var memWriter = new StringWriter(sb);

			//Create fake http context to render the view 
			var fakeResponse = new HttpResponse(memWriter);
			var fakeContext = new HttpContext(HttpContext.Current.Request, fakeResponse);
			var fakeControllerContext = new ControllerContext(
				 new HttpContextWrapper(fakeContext),
				 context.RouteData, context.Controller);

			var oldContext = HttpContext.Current;
			HttpContext.Current = fakeContext;

			//Use HtmlHelper to render partial view to fake context 
			var html = new HtmlHelper(new ViewContext(fakeControllerContext,
				 new FakeView(), new ViewDataDictionary(), new TempDataDictionary(), memWriter),
				 new ViewPage());
			html.RenderPartial(viewName, viewData);

			//Restore context 
			HttpContext.Current = oldContext;

			//Flush memory and return output 
			memWriter.Flush();
			return sb.ToString();
		}

		/// <summary>Fake IView implementation, only used to instantiate an HtmlHelper.</summary> 
		public class FakeView : IView
		{
			#region IView Members
			public void Render(ViewContext viewContext, System.IO.TextWriter writer)
			{
				throw new NotImplementedException();
			}
			#endregion
		}
	}
}