WPF 分层数据模板和树视图

Question

我正在尝试将递归集合绑定到 WPF 中的 Treeview。我只能在 UI

中看到第一层

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"} } }
};

XAML

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

Answer 1

您的 HierarchicalDataTemplate 缺少 ItemsSource

像这样：

<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>

WPF 分层数据模板和树视图

WPF HierarchicalDataTemplate & Treeview

wpf

hierarchicaldatatemplate