/// <summary>
        /// 获取权限树
        /// </summary>
        /// <returns></returns>
        protected string GetRightTree()
        {
            List <Right>     rights         = new URBasicInfoService().GetRights(SelectedSysID);
            List <RightItem> selectedRights = UserID > 0
                ? new URRightsService().GetUserRights(SelectedSysID, UserID)
                : new URRightsService().GetRoleRights(RoleID);
            StringBuilder jsonBuilder = new StringBuilder("[");

            for (int i = 0; i < rights.Count(); i++)
            {
                Right right = rights.ElementAt(i);
                jsonBuilder.AppendFormat("{{\"id\":\"{0}\",\"pId\":\"{1}\",\"name\":\"{2}\",\"open\":{3}",
                                         right.ID, right.ParentID, right.Name, "true");
                RightItem rr = selectedRights.FirstOrDefault(r => r.RightID == right.ID);
                if (rr != null)
                {
                    jsonBuilder.Append(",\"checked\":true");
                    if (rr.FromRole)
                    {
                        jsonBuilder.Append(",\"disabled\":true");
                    }
                }
                jsonBuilder.Append("},");
            }
            return(jsonBuilder.ToString().TrimEnd(',') + "]");
        }