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    <p>These steps should allow you to implement the required behaviour.<br> To summarize: </p> <ol> <li>You are using routing but not MVC. My example will map a url like <a href="http://host/Mysite/userid/12345" rel="nofollow noreferrer">http://host/Mysite/userid/12345</a> onto a real page at <a href="http://host/Mysite/Pages/users.aspx?userid=12345" rel="nofollow noreferrer">http://host/Mysite/Pages/users.aspx?userid=12345</a>.</li> <li>You want to control access to these addresses, requiring the user to logon. My example has a page <a href="http://host/Mysite/login.aspx" rel="nofollow noreferrer">http://host/Mysite/login.aspx</a> with a standard login control, and the site is configured to use forms authentication. </li> </ol> <h2>Step 1</h2> <p>I've "hidden" the contents of the Pages folder using this web.config in the Pages folder: </p> <pre><code> &lt;?xml version="1.0"?&gt; &lt;configuration&gt; &lt;system.web&gt; &lt;httpHandlers&gt; &lt;add path="*" verb="*" type="System.Web.HttpNotFoundHandler"/&gt; &lt;/httpHandlers&gt; &lt;pages validateRequest="false"&gt; &lt;/pages&gt; &lt;/system.web&gt; &lt;system.webServer&gt; &lt;validation validateIntegratedModeConfiguration="false"/&gt; &lt;handlers&gt; &lt;remove name="BlockViewHandler"/&gt; &lt;add name="BlockViewHandler" path="*" verb="*" preCondition="integratedMode" type="System.Web.HttpNotFoundHandler"/&gt; &lt;/handlers&gt; &lt;/system.webServer&gt; &lt;/configuration&gt; </code></pre> <p>This ensures that if anyone uses a url like <a href="http://host/Mysite/Pages/users.aspx?userid=12345" rel="nofollow noreferrer">http://host/Mysite/Pages/users.aspx?userid=12345</a>, then they receive a standard 404 response. </p> <h2>Step 2</h2> <p>My top level web.config file contains (as well as all the standard stuff) this location element: </p> <pre><code> &lt;location path="userid"&gt; &lt;system.web&gt; &lt;authorization&gt; &lt;deny users="?"/&gt; &lt;/authorization&gt; &lt;/system.web&gt; &lt;/location&gt; </code></pre> <p>This prevents anonymous access to urls of the form <a href="http://host/Mysite/userid/12345" rel="nofollow noreferrer">http://host/Mysite/userid/12345</a> which means users will be automatically redirected to login.aspx, then if they provide valid credentials, they will be redirected to the correct location.</p> <h2>Step 3</h2> <p>For reference here is my global.asax: </p> <pre><code>&lt;script RunAt="server"&gt; void Application_Start(object sender, EventArgs e) { // Code that runs on application startup RegisterRoutes(RouteTable.Routes); } public static void RegisterRoutes(RouteCollection routes) { routes.RouteExistingFiles = true; routes.Add("UseridRoute", new Route ( "userid/{userid}", new CustomRouteHandler("~/Pages/users.aspx") )); } &lt;/script&gt; </code></pre> <p>And here is my route handler:</p> <pre><code>using System.Web.Compilation; using System.Web.UI; using System.Web; using System.Web.Routing; using System.Security; using System.Web.Security; public interface IRoutablePage { RequestContext RequestContext { set; } } public class CustomRouteHandler : IRouteHandler { public CustomRouteHandler(string virtualPath) { this.VirtualPath = virtualPath; } public string VirtualPath { get; private set; } public IHttpHandler GetHttpHandler(RequestContext requestContext) { var page = BuildManager.CreateInstanceFromVirtualPath (VirtualPath, typeof(Page)) as IHttpHandler; if (page != null) { var routablePage = page as IRoutablePage; if (routablePage != null) routablePage.RequestContext = requestContext; } return page; } } </code></pre>
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