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copied!<p>EDIT: The original question was about how to detect session logout, and then automatically redirect to a specified controller and action. The question proved much more useful as it's current form however.</p> <hr> <p>I ended up using a combination of items to achieve this goal.</p> <p>First is the session expire filter found <a href="http://www.tyronedavisjr.com/index.php/2008/11/23/detecting-session-timeouts-using-a-aspnet-mvc-action-filter/" rel="noreferrer">here</a>. Then I wanted someway to specify the controller/action combo to get a redirect URL, which I found plenty of examples of <a href="http://weblogs.asp.net/scottgu/archive/2007/12/03/asp-net-mvc-framework-part-2-url-routing.aspx" rel="noreferrer">here</a>. In the end I came up with this:</p> <pre><code>public class SessionExpireFilterAttribute : ActionFilterAttribute { public String RedirectController { get; set; } public String RedirectAction { get; set; } public override void OnActionExecuting(ActionExecutingContext filterContext) { HttpContext ctx = HttpContext.Current; if (ctx.Session != null) { if (ctx.Session.IsNewSession) { string sessionCookie = ctx.Request.Headers["Cookie"]; if ((null != sessionCookie) && (sessionCookie.IndexOf("ASP.NET_SessionId") >= 0)) { UrlHelper helper = new UrlHelper(filterContext.RequestContext); String url = helper.Action(this.RedirectAction, this.RedirectController); ctx.Response.Redirect(url); } } } base.OnActionExecuting(filterContext); } } </code></pre>

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