如何将数据库中特定行的计数器添加到MVC布局[重复]

如何使导航栏中的徽章在所有导航中捕获我的控制器警告的应用程序信息?

在我的ControllerWarning中,我有一个函数,当requesited返回一个Json格式的数值。

namespace VS.Controllers
{
    public class ControllerWarning : Controller
    {
        private VSContext db = new VSContext();

        public JsonResult GetWarning(string user)
        {
            DateTime dt = DateTime.Now.Date;
            int contWarning = 0;

            var listaAvisos = db.Warnings.Where(a => a.User== user).ToList();
            var l = new List<Aviso>();

            foreach (var item in listaAvisos)
            {
                var res = item.Data - dt;
                item.QtdDias = res.Days;

                if (res.Days <= 5 && item.Enviado != true)
                {
                    contWarning++;
                }
            }

            return Json(contWarning);
        }
      }

      public ActionResult Index(){...}
      public ActionResult Details(int? id){...}
      public ActionResult Details(Warning warning){...}
 }

cshtml中的Navbar有一个徽章,应该收集WarningController返回的GetWarning(string user)

<li>
    @Html.ActionLink("Warning", "Index", "Warnings")
         <span class="badge">

                 @*HERE VALUE RECEIVED GETWARNING*@
                 GetWarning(string user)

         </span>
</li>