Server side redirection after jquery ajax call in asp.net mvc 4

return usually returns from method without executing any further statements in it so else part is not needed. This way you will get rid of a problem #1.

As for redirecting why not return some kind of redirect command:

[HttpPost]public ActionResult Index(LoginModel loginData){    if (login fails)    {        return Json(new {result = "InvalidLogin"}, JsonRequestBehavior.AllowGet);    }    return Json(new {result = "Redirect", url = Url.Action("MyAction", "MyController")});}

And then in javascript:

$.post(url, data, function (response) {  if (response.result == 'InvalidLogin') {      //show invalid login  }  else if (response.result == 'Error') {      //show error  }  else if (response.result == 'Redirect'){      //redirecting to main page from here for the time being.      window.location = response.url;  } });

This help me.

return JavaScript("window.location = '/'");

Ref. linkHow to get an ASP.NET MVC Ajax response to redirect to new page...

I had to do this but none of the solutions I found really satisfied my extreme requirements of JavaScript parsing errors that I had to avoid in order to redirect the client to the login page.

What I did was to send a simple "NOAUTH" string response from my custom Authorization attribute, then intercept the Ajax response before any event handlers are hit, and redirect the user by setting window.location.

Server side:

protected override void HandleUnauthorizedRequest(AuthorizationContext context){    if (context.RequestContext.HttpContext.Request.IsAjaxRequest())    {        var result = new ContentResult {Content = "NOAUTH"};        context.Result = result;        return;    }}

Then on the client side:

$.ajaxSetup({    dataFilter: function (data, type) {        if (data !== "" && data === "NOAUTH") {            window.location = '/';        }        return data;    }});

I would not recommend this approach though. If you have to do this, then I would at-least suggest instead putting the "NOAUTH" value inside the http response header, then read the value in a global JQuery complete handler.

Server side:

HttpContext.Current.Response.AddHeader("NOAUTH", "1");

Client-side:

$.ajaxSetup({    complete: function (jqXHR, textStatus) {        if (jqXHR.getResponseHeader("NOAUTH") === '1')            window.location = '/';    }});

Note that using dataFilter is the only way to intercept ajax requests before any other of your event handlers are hit.