listBox按周和年排序

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Windows.Controls;

public class DateListBoxItem
{
    public DateTime Date { get; set; }
    public string DisplayText { get; set; }
}

public class DateSorter
{
    public static void SortListBoxByWeekAndYear(ListBox listBox)
    {
        var items = listBox.Items.Cast<DateListBoxItem>().ToList();
        items.Sort((x, y) =>
        {
            if (x.Date.Year != y.Date.Year)
            {
                return x.Date.Year.CompareTo(y.Date.Year);
            }
            else
            {
                return CultureInfo.CurrentCulture.Calendar.GetWeekOfYear(x.Date, CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Monday).CompareTo(CultureInfo.CurrentCulture.Calendar.GetWeekOfYear(y.Date, CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Monday));
            }
        });

        listBox.Items.Clear();
        listBox.Items.AddRange(items);
    }
}