/// <summary>
        /// 获取用户的某个权限域的用户范围
        /// </summary>
        /// <param name="userInfo">用户</param>
        /// <param name="systemCode">系统编号</param>
        /// <param name="userId">用户主键</param>
        /// <param name="permissionCode">权限编号</param>
        /// <returns>主键数组</returns>
        public string[] GetUserScopeUserIds(BaseUserInfo userInfo, string systemCode, string userId, string permissionCode)
        {
            string[] result = null;

            var parameter = ServiceInfo.Create(userInfo, MethodBase.GetCurrentMethod());

            ServiceUtil.ProcessUserCenterReadDb(userInfo, parameter, (dbHelper) =>
            {
                var tableName = systemCode + "PermissionScope";
                var manager   = new BaseUserScopeManager(dbHelper, userInfo, tableName);
                result        = manager.GetUserIds(systemCode, userId, permissionCode);
            });

            return(result);
        }