WPF HierarchycalDataTemplate&；树形图

我正在尝试将递归集合绑定到WPF中的树视图。我只能看到UI中的第一级

public class Employee
{
    public string Name { get; set; }
    public List<Employee> Reportees { get; set; }
}

Employees = new ObservableCollection<Employee>
{
 new Employee { Name = "Bob1", Reportees=new List<Employee>{ new Employee { Name = "Bob1's Sub1"}, new Employee { Name = "Bob1's Sub2"} } },
 new Employee { Name = "Bob2", Reportees=new List<Employee>{ new Employee { Name = "Bob2's Sub1"}, new Employee { Name = "Bob2's Sub2"} } },
 new Employee { Name = "Bob3", Reportees=new List<Employee>{ new Employee { Name = "Bob3's Sub1"}, new Employee { Name = "Bob3's Sub2"} } }
};

公共类员工
{
公共字符串名称{get；set；}
公共列表报告对象{get；set；}
}
员工=新的可观察收集
{
新员工{Name=“Bob1”，报告对象=新列表{new Employee{Name=“Bob1's Sub1”}，新员工{Name=“Bob1's Sub2”}}，
新员工{Name=“Bob2”，报告对象=新列表{new Employee{Name=“Bob2's Sub1”}，新员工{Name=“Bob2's Sub2”}}，
新员工{Name=“Bob3”，报告对象=新列表{new Employee{Name=“Bob3的Sub1”}，新员工{Name=“Bob3的Sub2”}}
};

XAML

---

您的HierarchyCalDataTemplate缺少它的ItemsSource

大概是这样的：

<TreeView HorizontalAlignment="Left" Margin="10" VerticalAlignment="Top" Height="320" Width="300" ItemsSource="{Binding Employees}">
    <TreeView.Resources>
        <HierarchicalDataTemplate DataType="{x:Type model:Employee}" ItemsSource="{Binding Reportees}">
            <TextBlock Text="{Binding Name}" />
        </HierarchicalDataTemplate>
        <HierarchicalDataTemplate DataType="{x:Type System:String}" ItemsSource="{Binding Reportees}">
            <TextBlock Text="{Binding}" />
        </HierarchicalDataTemplate>
    </TreeView.Resources>
</TreeView>

<TreeView HorizontalAlignment="Left" Margin="10" VerticalAlignment="Top" Height="320" Width="300" ItemsSource="{Binding Employees}">
    <TreeView.Resources>
        <HierarchicalDataTemplate DataType="{x:Type model:Employee}" ItemsSource="{Binding Reportees}">
            <TextBlock Text="{Binding Name}" />
        </HierarchicalDataTemplate>
        <HierarchicalDataTemplate DataType="{x:Type System:String}" ItemsSource="{Binding Reportees}">
            <TextBlock Text="{Binding}" />
        </HierarchicalDataTemplate>
    </TreeView.Resources>
</TreeView>