//管理员添加页面
        public ActionResult AdminAddForm()
        {
            List <Role> roles = dbDrive.GetAllRoles();

            ViewData["roles"] = roles;
            return(View());
        }
        //获得全部角色
        public ActionResult GetAllRoles()
        {
            List <Role> roles  = dbDrive.GetAllRoles();
            int         number = 1;

            foreach (var role in roles)
            {
                role.number = number;
                number++;
            }
            //code--信息状态,默认为0,msg--返回信息,count--数据条数,data--数据
            return(Json(new { code = 0, msg = "", count = roles.Count, data = roles }, JsonRequestBehavior.AllowGet));
        }