/// <summary>
        /// 从数据库获取数据
        /// </summary>
        ///
        private void BindData()
        {
            DataTable dt = null;

            lvlist.DataContext = null;
            StringBuilder sb = new StringBuilder();

            sb.Append(string.Format(" roleLevel >= '{0}'", user_flag_tier));
            try
            {
                dt = operationContract.GetClientRole(sb.ToString());
                lvlist.DataContext = dt;
                currentTable       = dt;
            }
            catch (Exception)
            {
                return;
            }
        }