点击listview中的GridViewColumnHeader实现列排序

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Windows.Controls;
using System.Windows;
using System.Windows.Data;

namespace HemsClient
{
    public class SortableListView : ListView
    {
        //最后单击的标题
        private GridViewColumnHeader _lastHeaderClicked = null;
        //默认升序
        private ListSortDirection _lastDirection = ListSortDirection.Ascending;

        //排序字段的附加属性
        public static readonly DependencyProperty SortPropertyNameProperty = DependencyProperty.RegisterAttached("SortPropertyName", typeof(string), typeof(SortableListView));
        // 附加属性的Get方法
        public static string GetSortPropertyName(GridViewColumn obj)
        {
            return (string)obj.GetValue(SortPropertyNameProperty);
        }
        //附加属性的Set方法
        public static void SetSortPropertyName(GridViewColumn obj, string value)
        {
            obj.SetValue(SortPropertyNameProperty, value);
        }

        public SortableListView()
        {
            //注册单击标题事件
            this.AddHandler(
                GridViewColumnHeader.ClickEvent,
                new RoutedEventHandler(GridViewColumnHeaderClickedHandler));
        }

        /// <summary>
        /// 排序方法
        /// </summary>
        /// <param name="sortBy">排序字段</param>
        /// <param name="direction">升序/降序</param>
        private void Sort(string sortBy, ListSortDirection direction)
        {
            ICollectionView dataView =
                CollectionViewSource.GetDefaultView(this.ItemsSource);

            if (dataView != null)
            {
                dataView.SortDescriptions.Clear();
                SortDescription sd = new SortDescription(sortBy, direction);
                dataView.SortDescriptions.Add(sd);
                dataView.Refresh();
            }
        }

        //单击标题调用的方法
        private void GridViewColumnHeaderClickedHandler(object sender, RoutedEventArgs e)
        {
            GridViewColumnHeader headerClicked = e.OriginalSource as GridViewColumnHeader;
            ListSortDirection direction;

            if (headerClicked != null &&
                headerClicked.Role != GridViewColumnHeaderRole.Padding)
            {
                if (headerClicked != _lastHeaderClicked)
                {
                    direction = ListSortDirection.Ascending;
                }
                else
                {
                    if (_lastDirection == ListSortDirection.Ascending)
                    {
                        direction = ListSortDirection.Descending;
                    }
                    else
                    {
                        direction = ListSortDirection.Ascending;
                    }
                }
                //获得排序字段
                string sortBy = SortableListView.GetSortPropertyName(headerClicked.Column);
                if (string.IsNullOrEmpty(sortBy))
                {
                    sortBy = headerClicked.Column.Header as string;
                    return;
                }
                //排序操作
                this.Sort(sortBy, direction);

                _lastHeaderClicked = headerClicked;
                _lastDirection = direction;
            }
        }
    }
}