ListView排序并隔色显示

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.Windows.Forms;
using System.Drawing;

namespace STools
{
    class ListViewColumnSorter : IComparer
    {

        /**/
        /// <summary>
        /// 指定按照哪个列排序
        /// </summary>
        private int ColumnToSort;
        /**/
        /// <summary>
        /// 指定排序的方式
        /// </summary>
        private SortOrder OrderOfSort;
        /**/
        /// <summary>
        /// 声明CaseInsensitiveComparer类对象，
        /// 参见ms-help://MS.VSCC.2003/MS.MSDNQTR.2003FEB.2052/cpref/html/frlrfSystemCollectionsCaseInsensitiveComparerClassTopic.htm
        /// </summary>
        private CaseInsensitiveComparer ObjectCompare;         /**//// <summary>
        /// 构造函数
        /// </summary>
        public ListViewColumnSorter()
        {
            // 默认按第一列排序
            ColumnToSort = ;             // 排序方式为不排序
            OrderOfSort = SortOrder.None;             // 初始化CaseInsensitiveComparer类对象
            ObjectCompare = new CaseInsensitiveComparer();
        }         /**//// <summary>
        /// 重写IComparer接口.
        /// </summary>
        /// <param name="x">要比较的第一个对象</param>
        /// <param name="y">要比较的第二个对象</param>
        /// <returns>比较的结果.如果相等返回0，如果x大于y返回1，如果x小于y返回-1</returns>
        public int Compare(object x, object y)
        {
            int compareResult;
            ListViewItem listviewX, listviewY;             // 将比较对象转换为ListViewItem对象
            listviewX = (ListViewItem)x;
            listviewY = (ListViewItem)y;             // 比较
            compareResult = ObjectCompare.Compare(listviewX.SubItems[ColumnToSort].Text, listviewY.SubItems[ColumnToSort].Text);
            //Console.WriteLine(listviewX.SubItems[ColumnToSort].Text + "<->" + listviewY.SubItems[ColumnToSort].Text+":"+compareResult);

            // 根据上面的比较结果返回正确的比较结果
            if (OrderOfSort == SortOrder.Ascending)
            {
                // 因为是正序排序，所以直接返回结果
                return compareResult;
            }
            else if (OrderOfSort == SortOrder.Descending)
            {
                // 如果是反序排序，所以要取负值再返回
                return (-compareResult);
            }
            else
            {
                // 如果相等返回0
                return ;
            }
        }         /**//// <summary>
        /// 获取或设置按照哪一列排序.
        /// </summary>
        public int SortColumn
        {
            set
            {
                ColumnToSort = value;
            }
            get
            {
                return ColumnToSort;
            }
        }         /**//// <summary>
        /// 获取或设置排序方式.
        /// </summary>
        public SortOrder Order
        {
            set
            {
                OrderOfSort = value;
            }
            get
            {
                return OrderOfSort;
            }
        }
    }
}

下面是应用排序，并不同值隔色显示

 private void listView1_ColumnClick(object sender, ColumnClickEventArgs e)
        {
            ListView lv = sender as ListView;
            // 检查点击的列是不是现在的排序列.
            int column = (lv.ListViewItemSorter as ListViewColumnSorter).SortColumn;//当前排序的序列
            listView1.Columns[column].Text = listView1.Columns[column].Text.Replace("↓", "").Replace("↑", "");
            if (e.Column == (lv.ListViewItemSorter as ListViewColumnSorter).SortColumn)
            {
                // 重新设置此列的排序方法.
                if ((lv.ListViewItemSorter as ListViewColumnSorter).Order == SortOrder.Ascending)
                {
                    (lv.ListViewItemSorter as ListViewColumnSorter).Order = SortOrder.Descending;
                    listView1.Columns[e.Column].Text += "↑";
                }
                else
                {
                    (lv.ListViewItemSorter as ListViewColumnSorter).Order = SortOrder.Ascending;
                    listView1.Columns[e.Column].Text += "↓";
                }
            }
            else
            {
                // 设置排序列，默认为正向排序
                (lv.ListViewItemSorter as ListViewColumnSorter).SortColumn = e.Column;
                (lv.ListViewItemSorter as ListViewColumnSorter).Order = SortOrder.Ascending;
                listView1.Columns[e.Column].Text += "↓";
            }
            // 用新的排序方法对ListView排序
            ((ListView)sender).Sort();

            for (int i = ; i < listView1.Items.Count; i++)
            {
                if (i !=  && listView1.Items[i].SubItems[e.Column].Text == listView1.Items[i - ].SubItems[e.Column].Text)
                {
                    listView1.Items[i].BackColor = listView1.Items[i - ].BackColor;
                }
                else if (i == )
                {

                    listView1.Items[i].BackColor = Color.Transparent;
                }
                else
                {
                    if (listView1.Items[i - ].BackColor == Color.Transparent)
                    {
                        listView1.Items[i].BackColor = Color.LightBlue;

                    }
                    else
                    {
                        listView1.Items[i].BackColor = Color.Transparent;
                    }

                }

            }
            //listView1.Refresh();
        }