ViewSwitcher.ascx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Routing;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.AspNet.FriendlyUrls.Resolvers;

namespace WebFormsApplication {
	public partial class ViewSwitcher : System.Web.UI.UserControl {
		protected string CurrentView { get; private set; }

		protected string AlternateView { get; private set; }

		protected string SwitchUrl { get; private set; }

		protected void Page_Load(object sender, EventArgs e) {
			// Determine current view
			var isMobile = WebFormsFriendlyUrlResolver.IsMobileView(new HttpContextWrapper(Context));
			CurrentView = isMobile ? "Mobile" : "Desktop";

			// Determine alternate view
			AlternateView = isMobile ? "Desktop" : "Mobile";

			// Create switch URL from the route, e.g. ~/__FriendlyUrls_SwitchView/Mobile?ReturnUrl=/Page
			var switchViewRouteName = "AspNet.FriendlyUrls.SwitchView";
			var switchViewRoute = RouteTable.Routes[switchViewRouteName];
			if(switchViewRoute == null) {
				// Friendly URLs is not enabled or the name of the switch view route is out of sync
				this.Visible = false;
				return;
			}
			var url = GetRouteUrl(switchViewRouteName, new { view = AlternateView, __FriendlyUrls_SwitchViews = true });
			url += "?ReturnUrl=" + HttpUtility.UrlEncode(Request.RawUrl);
			SwitchUrl = url;
		}
	}
}