protected override void BeforeUpdate()
        {
            base.BeforeUpdate();

            string expression = LibSysUtils.ToString(base.Tables[0].Rows[0]["Remark"]);
            LibDataTable libDataTable = base.Tables[0];
            SysDataTableComputer sysDataTableComputer = new SysDataTableComputer(this.Tables.ToArray(), ModelManager.DataSourceManager.GetDataSource(base.ProgId), 0, ExecuteLocation.Server);
            base.AddMsg(LibMessageKind.Info, sysDataTableComputer.ComputeExpr(expression, base.Tables[0].Rows[0]).ToString());
        }