hMailServer.Administrator.ucListView.OnColumnClick C# (CSharp) Method

        protected override void OnColumnClick(ColumnClickEventArgs e)
        {
            // Determine if clicked column is already the column that is being sorted.
             if (e.Column == _columnSorter.SortColumn)
             {
            // Reverse the current sort direction for this column.
            if (_columnSorter.Order == SortOrder.Ascending)
            {
               _columnSorter.Order = SortOrder.Descending;
            }
            else
            {
               _columnSorter.Order = SortOrder.Ascending;
            }
             }
             else
             {
            // Set the column number that is to be sorted; default to ascending.
            _columnSorter.SortColumn = e.Column;
            _columnSorter.Order = SortOrder.Ascending;
             }

             if (_numericSortOrders.Contains(e.Column))
            _columnSorter.NumericSort = true;

             // Perform the sort with these new sort options.
             this.Sort();

             	      base.OnColumnClick(e);
        }