<Window x:Class="demo.GroupInRanges"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        Title="GroupInRanges" Height="300" Width="300"        xmlns:local="clr-namespace:demo"        xmlns:component="clr-namespace:System.ComponentModel;assembly=WindowsBase">    <Window.Resources>        <!--分组转换器-->        <local:PriceRangeProductGrouper x:Key="Price50Grouper" GroupInterval="100"></local:PriceRangeProductGrouper>        <!--CollectionViewSource按价格分组：GroupInterval指定分组间隔-->        <CollectionViewSource x:Key="GroupByRangeView">            <CollectionViewSource.SortDescriptions>                <component:SortDescription PropertyName="UnitCost" Direction="Ascending"></component:SortDescription>            </CollectionViewSource.SortDescriptions>            <CollectionViewSource.GroupDescriptions>                <PropertyGroupDescription PropertyName="UnitCost" Converter="{StaticResource Price50Grouper}"></PropertyGroupDescription>            </CollectionViewSource.GroupDescriptions>        </CollectionViewSource>    </Window.Resources>    <Grid>        <Grid.RowDefinitions>            <RowDefinition Height="Auto"></RowDefinition>            <RowDefinition></RowDefinition>        </Grid.RowDefinitions>        <Button Margin="7,7,7,0" Padding="2" Click="cmdGetProducts_Click">Get Products</Button>        <!--Binding Source指定CollectionViewSource-->        <ListBox Grid.Row="1" Margin="7,3,7,10" Name="lstProducts" ItemsSource="{Binding Source={StaticResource GroupByRangeView}}">            <!--项模板-->            <ListBox.ItemTemplate>                <DataTemplate>                    <TextBlock>                        <TextBlock Text="{Binding ModelName}"></TextBlock>                        (<TextBlock Text="{Binding UnitCost,StringFormat={}{0:C}}"></TextBlock>)                    </TextBlock>                </DataTemplate>            </ListBox.ItemTemplate>            <!--分组样式-->            <ListBox.GroupStyle>                <GroupStyle>                    <GroupStyle.HeaderTemplate>                        <DataTemplate>                            <TextBlock Text="{Binding Path=Name}" FontWeight="Bold" Foreground="White" Background="LightGreen" Margin="0,5,0,0" Padding="3"></TextBlock>                        </DataTemplate>                    </GroupStyle.HeaderTemplate>                </GroupStyle>            </ListBox.GroupStyle>        </ListBox>    </Grid></Window>

using System;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Shapes;using StoreDatabase;using System.Collections.Generic;using System.Windows.Data;namespace demo{    /// <summary>    /// GroupInRanges.xaml 的交互逻辑    /// </summary>    public partial class GroupInRanges : Window    {        public GroupInRanges()        {            InitializeComponent();        }        private ICollection<Product> products;        private void cmdGetProducts_Click(object sender, RoutedEventArgs e)        {            products = App.StoreDb.GetProducts();            //从xaml中查找CollectionViewSource            CollectionViewSource viewSource = (CollectionViewSource)this.FindResource("GroupByRangeView");            //viewSource.Source指向数据集合ICollection<Product> products            viewSource.Source = products;        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows.Data;using System.Globalization;namespace demo{    class PriceRangeProductGrouper : IValueConverter    {        public int GroupInterval        {            get;            set;        }        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)        {            decimal price = (decimal)value;            if (price < GroupInterval)            {                return String.Format("Less than {0:C}", GroupInterval);            }            else            {                int interval = (int)price / GroupInterval;                int lowerLimit = interval * GroupInterval;                int uperLimit = (interval + 1) * GroupInterval;                return String.Format("{0:C} to {1:C}",lowerLimit,uperLimit);            }        }        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)        {            throw new NotSupportedException("This converter is for grouping only.");        }    }}