asp.net mvc Ajax服务器跳转

1.过滤器权限验证

  [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true, AllowMultiple = true)]
         public class CustomAuthAttribute : ActionFilterAttribute, IAuthorizationFilter
         {
             public void OnAuthorization(AuthorizationContext filterContext)
             {
                 if (!filterContext.ActionDescriptor.IsDefined(typeof(AllowAnonymousAttribute), true)
                             && !filterContext.ActionDescriptor.ControllerDescriptor.IsDefined(typeof(AllowAnonymousAttribute), true))
                 {
                     UserInfo user = filterContext.HttpContext.Session["CurentUser"] as UserInfo;
                     if (user == null || user.Id <= )
                     {
                         if (filterContext.HttpContext.Request.IsAjaxRequest())
                         {
                             filterContext.Result = new HttpStatusCodeResult();
                             filterContext.HttpContext.Response.Write("/Home/Login");
                             return;
                         }
                         else
                         {
                             filterContext.Result = new RedirectResult("/Home/Login");
                             return;
                         }
                     }
                 }
             }
         }

2.客户端重写$.Ajax,最好在母版页中加上此代码，统一处理

 <script type="text/javascript">
     (function ($) {
         //备份jquery的ajax方法
         var _ajax = $.ajax;
         //重写jquery的ajax方法
         $.ajax = function (opt) {
             //备份opt中error和success方法
             var fn = {
                 error: function (XMLHttpRequest, textStatus, errorThrown) { },
             }
             if (opt.error) {
                 fn.error = opt.error;
             }
             //扩展增强处理
             var _opt = $.extend(opt, {
                 error: function (XMLHttpRequest, textStatus, errorThrown) {
                     //错误方法增强处理
                     if (XMLHttpRequest.status == "") {
                         window.location.href = "/FlexibleBenefit/Login";
                     }
                     else
                     {
                         fn.error(XMLHttpRequest, textStatus, errorThrown);
                     }
                 }
             });
             _ajax(_opt);
         };
     })(jQuery);

     $.ajaxSetup({
         statusCode: {
             : function (data) {
                 window.location.href = data.responseText;
             }
         }
     });
 </script>