c# – HttpContext.Current.Session始终为空

我有一个从ActionFilterAttribute派生的GuestTokenValidationAttribute类,在那里我从头部接收一个令牌,并将其用作String令牌.然后我想将该标记添加到会话中,但无论我做什么,Session始终为null.

请各位指导或帮助,我们将不胜感激,

代码示例如下：

public class GuestTokenValidationAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(HttpActionContext actionContext)
    {
         string token;
        try
        {
           token =  actionContext.Request.Headers.GetValues("Authorization-Token").First();
        }
        catch (Exception)
        {
            actionContext.Response = new HttpResponseMessage(HttpStatusCode.Unauthorized)
            {
                Content = new StringContent("Unauthorized User")
            };
            return;
        }

        if(string.IsNullOrEmpty(token))
        {
          actionContext.Response = new HttpResponseMessage(HttpStatusCode.Unauthorized)
            {
                Content = new StringContent("Unauthorized User")
            };
            return;  
        }

        try
        {
            var repository = DependencyResolver.Current.GetService<IRepository<Guest>>();
            var guest = repository.GetAll().FirstOrDefault(x => x.Token == token);
            if(guest == null)
            {
                actionContext.Response = new HttpResponseMessage(HttpStatusCode.Unauthorized)
                {
                    Content = new StringContent("Unauthorized User")
                };
                return;  
            }

        }
        catch (Exception)
        {
            actionContext.Response = new HttpResponseMessage(HttpStatusCode.Unauthorized)
            {
                Content = new StringContent("Unauthorized User")
            };
            return;
        }




       HttpContext.Current.Session.Add("guesttoken",token);

        base.OnActionExecuting(actionContext);

    }