asp.net-mvc-3 – 当用户需要再次登录时,Ajax.ActionLink返回div

public class AuthorizeAjaxAttribute : AuthorizeAttribute
{
    protected override void HandleUnauthorizedRequest(AuthorizationContext 
                                                      filterContext)
    {
        if (filterContext.HttpContext.Request.IsAjaxRequest())
        {
            // It was an AJAX request => no need to redirect
            // to the login url,just return a JSON object
            // pointing to this url so that the redirect is done 
            // on the client

            var referrer = filterContext.HttpContext.Request.UrlReferrer;

            filterContext.Result = new JsonResult
            {
                JsonRequestBehavior = JsonRequestBehavior.AllowGet,Data = new { redirectTo = FormsAuthentication.LoginUrl + 
                            "?ReturnUrl=" + 
                             referrer.LocalPath.Replace("/","%2f") }
            };
        }
        else
            base.HandleUnauthorizedRequest(filterContext);
    }
}

创建一个Javascript函数来处理重定向：

<script type="text/javascript">
    function replaceStatus(result) {
        // if redirectTo has a value,redirect to the link
        if (result.redirectTo) {
            window.location.href = result.redirectTo;
        }
        else {
            // when the AJAX succeeds refresh the mydiv section
            $('#mydiv').html(result);
        }
    };
</script>

然后在Ajax.ActionLink的OnSuccess选项中调用该函数

Ajax.ActionLink("Update Status","GetStatus",new AjaxOptions { OnSuccess="replaceStatus" })