Asp.net mvc 获取MVC的ActionExecutedContext上的用户名？

如何在MVC中获取当前登录用户的名称？我尝试了以下代码，我可以得到日期和方法名，但不能得到用户名

public void OnActionExecuted(ActionExecutedContext filterContext)
{
    AcibademUniversitesiDBEntities model = new AcibademUniversitesiDBEntities();
    Logging logbilgi = new Logging();

    logbilgi.date= DateTime.Now.ToString();
    logbilgi.Method = filterContext.ActionDescriptor.ActionName;
    logbilgi.text= filterContext.ActionDescriptor.ControllerDescriptor.ControllerName;
    //logbilgi.user= filterContext.RequestContext.HttpContext.User.Identity.Name;
    //logbilgi.user= filterContext.HttpContext.User.Identity.Name;
    logbilgi.user= HttpContext.Current.User.Identity.Name;
    model.Logging.Add(logbilgi);
    model.SaveChanges();
}

public void OnActionExecuting(ActionExecutingContext filterContext)
{
    AcibademUniversitesiDBEntities model = new AcibademUniversitesiDBEntities();
    Logging logbilgi = new Logging();

    logbilgi.date= DateTime.Now.ToString();
    logbilgi.Method = filterContext.ActionDescriptor.ActionName;
    logbilgi.text= filterContext.ActionDescriptor.ControllerDescriptor.ControllerName;
    //logbilgi.user= filterContext.RequestContext.HttpContext.User.Identity.Name;
    //logbilgi.user= filterContext.HttpContext.User.Identity.Name;
    logbilgi.user= HttpContext.Current.User.Identity.Name;
    model.Logging.Add(logbilgi);
    model.SaveChanges();
}

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在Web.config中的system.Web中，是否有类似的内容

<authentication mode="Windows" />

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这是一个不太可能的选择，但是你能试试这个吗

logbilgi.user = filterContext.HttpContext.Current.User.Identity.Name;

是，我添加了“”，但用户返回null