Added all code to support auto-routing surface controllers and started implementing the code for

BeginUmbracoForm.

src/Umbraco.Web/Mvc/SurfaceControllerFactory.cs

@@ -0,0 +1,67 @@
+using System;
+using System.Web.Mvc;
+using System.Web.Routing;
+
+namespace Umbraco.Web.Mvc
+{
+	/// <summary>
+	/// Creates SurfaceControllers
+	/// </summary>
+	public class SurfaceControllerFactory : RenderControllerFactory
+	{
+		/// <summary>
+		/// Check if the correct data tokens are in the route values so that we know its a surface controller route
+		/// </summary>
+		/// <param name="request"></param>
+		/// <returns></returns>
+		public override bool CanHandle(RequestContext request)
+		{
+			var area = request.RouteData.DataTokens["area"];
+			
+			//if its a non-area route don't handle, all surface controllers will be in the 'umbraco' area
+			if (area == null || string.IsNullOrWhiteSpace(area.ToString()))
+				return false;
+
+			//ensure there is an umbraco token set
+			var umbracoToken = request.RouteData.DataTokens["umbraco"];
+			if (umbracoToken == null || string.IsNullOrWhiteSpace(umbracoToken.ToString()))
+				return false;
+
+			return true;
+		}
+
+		/// <summary>
+		/// Create the controller
+		/// </summary>
+		/// <param name="requestContext"></param>
+		/// <param name="controllerName"></param>
+		/// <returns></returns>
+		public override IController CreateController(RequestContext requestContext, string controllerName)
+		{
+			//first try to instantiate with the DependencyResolver, if that fails, try with the UmbracoContext as a param, if that fails try with no params.
+			var controllerType = GetControllerType(requestContext, controllerName);
+			if (controllerType == null)
+				throw new InvalidOperationException("Could not find a controller type for the controller name " + controllerName);
+
+			object controllerObject;
+			try
+			{
+				controllerObject = DependencyResolver.Current.GetService(controllerType);
+			}
+			catch (Exception)
+			{
+				try
+				{
+					controllerObject = Activator.CreateInstance(controllerType, UmbracoContext.Current);
+				}
+				catch (Exception)
+				{
+					//if this throws an exception, we'll let it
+					controllerObject = Activator.CreateInstance(controllerType);
+				}
+			}
+			//if an exception is thrown here, we want it to be thrown as its an invalid cast.
+			return (IController)controllerObject;			
+		}
+	}
+}