fyiReporting.RDL.Report.GetPageExpressionRows C# (CSharp) Method

        internal Rows GetPageExpressionRows(string exprname)
        {
            if (_CurrentPage == null)
                return null;

            return _CurrentPage.GetPageExpressionRows(exprname);
        }

        public object Evaluate(Report rpt, Row row)
        {
            try
            {
                // Check to see if we're evaluating an expression in a page header or footer;
                //   If that is the case the rows are cached by page.
                if (row == null && this.UniqueName != null)
                {
                    Rows rows = rpt.GetPageExpressionRows(UniqueName);
                    if (rows != null && rows.Data != null && rows.Data.Count > 0)
                    {
                        row = rows.Data[0];
                    }
                }

                return(_Expr.Evaluate(rpt, row));
            }
            catch (Exception e)
            {
                string err;
                if (e.InnerException != null)
                {
                    err = String.Format("Exception evaluating {0}.  {1}.  {2}", _Source, e.Message, e.InnerException.Message);
                }
                else
                {
                    err = String.Format("Exception evaluating {0}.  {1}", _Source, e.Message);
                }

                ReportError(rpt, 4, err);
                return(null);
            }
        }