int count = 0;
            foreach (var column in srcFields.Split(','))
            {
                var srcTableAlias = column.Split('.')[0];
                var srcTable = Outt.Data.Tables[GetTableIndex(srcTableAlias)];
               
                var rows = srcTable.Select(srcfilter);
                if (rows.Length == 1)
                {
                    var srcRowIndex = srcTable.Rows.IndexOf(rows[0]);
                    string value;
                    value = GetValue(Outt.Data, srcRowIndex, column).ToString();
                [color=red] expression = expression.Replace("{"+count+"}",value[count]);[/color]
                }
                count++;
            }