how to redirect to new page after jquery ajax call in MVC if session timeout?

1- I have an Ajax link that call an action and that action returns a view , that view open in a specif开发者_如何学编程ic Div (consider it as a menu that update the div with the corresponding view) 2- if session timeout the returned my logon view

so if i click on the link and session is timeout , the log on view open in the div not in the whole page

what i should do so if the session timeout it return logon view in new page in on my div?

An efficient way to handle a session expiry is to create a custom Authorization attribute and return a HTTP 403 response if the session has expired and were dealing with an ajax request.

To create an Ajax aware authorization attribute you can inherit from AuthorizeAttribute and override the HandleUnauthorizedRequest event with a check on the type of request eg. IsAjaxRequest()

public class AjaxAuthorizeAttribute : AuthorizeAttribute
{
    protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)
    {
        if (filterContext.HttpContext.Request.IsAjaxRequest())
        {
            // Fire back an unauthorized response
            filterContext.HttpContext.Response.StatusCode = 403;
        }
        else
            base.HandleUnauthorizedRequest(filterContext);
    }
}

Then just decorate your controllers or actions with the AjaxAuthorize attribute just as you normally would with Authorize

[AjaxAuthorize(Roles = "1,2,3,4,5")]
public class HomeController 
{

Then if you're using jQuery you can handle the 403 response by creating a global ajax error handler.

    $.ajaxSetup({
        error: function (x, e) {
            if (x.status == 403) {
                alert("Sorry, your session has expired. Please login again to continue");
                window.location = "/login";
            }
        }
    });

You can redirect user to login page on Session_Start event in Global

protected void Session_Start()
    {
        GeneRateKey();
        if (Session["Username"] != null)
        {
            //Redirect to Welcome Page if Session is not null  
            HttpContext.Current.Response.Redirect("~/WelcomeScreen", false);

        }
        else
        {
            //Redirect to Login Page if Session is null & Expires                   
            new RedirectToRouteResult(new RouteValueDictionary { { "action", "Index" }, { "controller", "Login" } });
        }
    }