public static void AssignTo(ListView listView, params ColumnFormat[] formats)
{
var comparer = new ListViewItemTextComparer(listView);
comparer.AddColumnFormats(formats);
}
public int Compare(object x, object y)
{
var itemX = x as ListViewItem;
var itemY = y as ListViewItem;
if (itemX == null || itemY == null) return -1;
if (_sortColumn >= itemX.SubItems.Count) return -1;
if (_sortColumn >= itemY.SubItems.Count) return -1;
var xValue = itemX.SubItems[_sortColumn].Text;
var yValue = itemY.SubItems[_sortColumn].Text;
var compareValue = 0;
var columnFormat = ColumnFormat.Text;
if (_sortColumn < _columnFormats.Count)
{
try { columnFormat = (ColumnFormat)_columnFormats[_sortColumn]; }
// ReSharper disable EmptyGeneralCatchClause
catch { }
// ReSharper restore EmptyGeneralCatchClause
}
// Special case, if the column format isn't tag and any string is empty, it shouldn't be parsed
if (columnFormat != ColumnFormat.Tag)
{
if (xValue == "" && yValue == "") return 0;
if (xValue == "") return SortDescending ? 1 : -1;
if (yValue == "") return SortDescending ? -1 : 1;
}
// If the column format is percentage, strip any whitespace and '%' from the value and
// change the column format to numeric
if (columnFormat == ColumnFormat.Percentage)
{
xValue = xValue.Replace("%", "").Trim();
yValue = yValue.Replace("%", "").Trim();
columnFormat = ColumnFormat.Numeric;
}
if (columnFormat == ColumnFormat.NumericUnit)
{
xValue = DECIMAL_REGEX.Replace(xValue, "");
yValue = DECIMAL_REGEX.Replace(yValue, "");
columnFormat = ColumnFormat.Numeric;
}
try
{
compareValue = CompareValues(columnFormat, xValue, yValue, itemX, itemY);
}
// ReSharper disable EmptyGeneralCatchClause
catch { }
// ReSharper restore EmptyGeneralCatchClause
if (compareValue == 0 && _secondSortColumn != -1 && _secondSortColumn != _sortColumn)
{
var comparer = new ListViewItemTextComparer
{
_columnFormats = _columnFormats,
SortColumn = _secondSortColumn
};
compareValue = comparer.Compare(x, y);
}
return compareValue != 0 ? (SortDescending ? -compareValue : compareValue) : 1;
}