ListViewItem背景颜色隔行交替变换

[c#]代码库

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

public class ListViewBackgroundConverter :IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            ListViewItem item = (ListViewItem)value;
            ListView listView =
                ItemsControl.ItemsControlFromItemContainer(item) as ListView;
            
            int index = listView.ItemContainerGenerator.IndexFromContainer(item);

            if (index % 2 == 0)
            {
                return Brushes.White;
            }
            else
            {
                return Brushes.WhiteSmoke;
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotSupportedException();
        }
    }

代码使用：<local:ListViewBackgroundConverter x:Key="lvConverter"/>