WPF复杂分层数据模板

我正在看一个复杂的结构，我似乎找不到一种方法来显示它…

我的情况:

Class: Milestone内部有2个列表，其他子里程碑列表和活动列表。

结构可以是这样的

M1

• 里程碑
  • SubMilestone
    <
    • 里程碑/gh><
    • 活动/gh>
  • Submilestone
<
• 活动/gh>

有人知道如何创建这个吗?或者能给我指引方向?

回答我的问题

<TreeView ItemsSource="{Binding Path=Project.TrackList}">
                <TreeView.Resources>
                    <HierarchicalDataTemplate DataType="{x:Type deto:Track}" ItemsSource="{Binding Path=FaseList}">
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="{Binding Path=TrackType}" />
                        </StackPanel>
                    </HierarchicalDataTemplate>
                    <HierarchicalDataTemplate DataType="{x:Type deto:Fase}" ItemsSource="{Binding Path=MilestoneList}">
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="{Binding Path=FaseType}" />
                        </StackPanel>
                    </HierarchicalDataTemplate>
                    <HierarchicalDataTemplate DataType="{x:Type deto:Milestone}" ItemsSource="{Binding Converter={StaticResource MConverter}}">
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="{Binding Path=Description}" />
                        </StackPanel>
                    </HierarchicalDataTemplate>
                    <HierarchicalDataTemplate DataType="{x:Type deto:Activity}" ItemsSource="{Binding Path=ActivityList}">
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="{Binding Path=Description}" />
                        </StackPanel>
                    </HierarchicalDataTemplate>
                </TreeView.Resources>
            </TreeView>

和转换器:

public class MilestoneConverter : IValueConverter
{
    #region IValueConverter Members
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        var m = value as Milestone;
        CompositeCollection collection = new CompositeCollection();
        collection.Add(new CollectionContainer()
        {
            Collection = m.MilestoneList
        });
        collection.Add(new CollectionContainer()
        {
            Collection = m.ActivityList
        });
        return collection;
    }
    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
    #endregion
}

public class MilestoneItemsSourceCreator : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        var input = value as Milestone;
        CompositeCollection collection = new CompositeCollection();
        collection.Add(new CollectionContainer(){ Collection = input.SubMilestones });
        collection.Add(new CollectionContainer(){ Collection = input.Activities });
        return collection;
    }
    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotSupportedException();
    }
}

<vc:MilestoneItemsSourceCreator x:Key="MilestoneItemsSourceCreator"/>
<HierarchicalDataTemplate DataType="{x:Type local:Milestone}"
                          ItemsSource="{Binding Converter={StaticResource MilestoneItemsSourceCreator}}">
    <!-- DataTemplate -->
</HierarchicalDataTemplate>