ASR.Interface.Report.Sort C# (CSharp) Метод

        private IEnumerable<DisplayElement> Sort(IEnumerable<DisplayElement> tmp)
        {
            // if no columns to sort by, then just return the tmp variable
            if (SortColumns == null || SortColumns.Count == 0)
            {
                return tmp;
            }

            IOrderedEnumerable<DisplayElement> sortedList = null;

            bool isFirstTimeThrough = true;

            foreach (string columnName in SortColumns.Keys)
            {
                Func<DisplayElement, object> columnValue = null;
                string sortOptions = SortColumns[columnName];
                // need to copy the column name, or it executes against the wrong column when we actually do the sort
                string copyOfColumnName = columnName;

                // sort datetime values separately
                if (sortOptions.Contains("DateTime"))
                {
                    columnValue = t => ParseDate(t.GetColumnValue(copyOfColumnName));
                }
                else
                {
                    columnValue = t => t.GetColumnValue(copyOfColumnName);
                }

                // and sort based on order
                if (sortOptions.Contains("ASC"))
                {
                    sortedList = (isFirstTimeThrough) ? tmp.OrderBy(columnValue):sortedList.ThenBy(columnValue);
                    isFirstTimeThrough = false;
                }
                else if (sortOptions.Contains("DESC"))
                {
                    sortedList = (isFirstTimeThrough) ? tmp.OrderByDescending(columnValue):sortedList.ThenByDescending(columnValue);
                    isFirstTimeThrough = false;
                }
            }
            return sortedList;
        }