MVC巧用枚舉做權限管理

使用者資料表，每個使用者有一個或者多個權限，使用者表如下

public class CustomEnum
    {
        [Flags]
        /// <summary>
        /// 使用者角色枚舉
        /// </summary>
        public enum UserRole
        {
            /// <summary>
            /// 遊客
            /// </summary>
            Visitor = 1,
            /// <summary>
            /// 學生
            /// </summary>
            Student = 2,
            /// <summary>
            /// 老師
            /// </summary>
            /// 
            Teacher = 4,
            /// <summary>
            /// 家長
            /// </summary>
            Parents = 8,
            /// <summary>
            /// 加盟商
            /// </summary>
            Agents = 16
        }
    }為以下對象權限對象指派
  /// <summary>
        /// 使用者角色
        /// </summary>
        public static CustomEnum.UserRole UserRole
        {
            get
            {
                if (!string.IsNullOrEmpty(SessionAction.ReadSession("xxb_WebUserRole")))
                {
                    return (CustomEnum.UserRole)Enum.Parse(typeof(CustomEnum.UserRole), SessionAction.ReadSession("xxb_WebUserRole"));
                  }
                else
                {
                    return CustomEnum.UserRole.Visitor;
                }
            }
            set
            {
                System.Web.HttpContext.Current.Session["xxb_WebUserRole"] = (CustomEnum.UserRole)Enum.Parse(typeof(CustomEnum.UserRole), value.ToString());

            }
        }用以下語句判斷是否屬于某種權限，并進行某種操作
 if (WebSession.UserRole == CustomEnum.UserRole.Visitor) //如果是普通遊客  
                {
                    //跳轉到登陸頁面
                    filterContext.Result = new RedirectResult("/User/LogOn?ReturnUrl=" + filterContext.HttpContext.Request.Url);
                }
                else
                { 
                    //跳轉到權限提醒頁面
                    filterContext.Result = new RedirectResult("/Home/Role?ReturnUrl=" + filterContext.HttpContext.Request.Url);
                }