Redirect at Session Timeout in Global.asax in mvc4

Question

I am trying to detect when a session ends and then redirect user to the home page once this is done in my global asax file. I am using below code which I found here global.asax: ``` protected void Session_Start() { if (Context.Session != null) { if (Context.Session.IsNewSession) { string sCookieHeader = Request.Headers["Cookie"]; if ((null != sCookieHeader) && (sCookieHeader.IndexOf("ASP.NET_SessionId") >= 0)) { //intercept current route HttpContextBase currentContext = new HttpContextWrapper(HttpContext.Current); RouteData routeData = RouteTable.Routes.GetRouteData(currentContext); //Substitute route Data Token Values for the Area routeData.DataTokens["area"] = ""; routeData.DataTokens["UseNamespaceFallback"] = true; //substitute route values routeData.Values["controller"] = "home"; routeData.Values["action"] = "index"; routeData.Values.Add("timedOut", "true"); //routeData.Values["id"] = "timedOut"; IRouteHandler routeHandler = routeData.RouteHandler; RequestContext requestContext =…

Accepted Answer

You can make a custom Action Filter for your controller that handles this:

```
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Reflection;

namespace Web {

public class SessionExpireFilterAttribute : ActionFilterAttribute {

public override void OnActionExecuting( ActionExecutingContext filterContext ) {
            HttpContext ctx = HttpContext.Current;

// check if session is supported
            if ( ctx.Session != null ) {

// check if a new session id was generated
                if ( ctx.Session.IsNewSession ) {

// If it says it is a new session, but an existing cookie exists, then it must
                    // have timed out
                    string sessionCookie = ctx.Request.Headers[ "Cookie" ];
                    if ( ( null != sessionCookie ) && ( sessionCookie.IndexOf ( "ASP.NET_SessionId" ) >= 0 ) ) {

ctx.Response.Redirect ( "~/Home/Login" );
                    }
                }
            }

base.OnActionExecuting ( filterContext );
        }
    }
}
```

And then, I would apply this filter to my Controller action methods like so:

```
 using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.Mvc;
    using System.Web.Mvc.Ajax;

namespace Web.Controllers {

public class HomeController : Controller {

[SessionExpireFilter]
            public ActionResult Index( ) {
                // This method will not execute if our session has expired

// render Home Page
                return View();
            }

public ActionResult Login() {
                // render Login page
                return View();
            }
        }
    }
```

Redirect at Session Timeout in Global.asax in mvc4

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