c# - 递归 TreeView

Question

我正在尝试在打开以下模型的 IsVirtualizing 的情况下执行递归 TreeView:

    public class DataContainer
    {
        public List<DataEntity> Entities { get; set; }
    }

    public class DataEntity
    {
        public uint m_dwID { get; set; }

        public int m_nMargineH { get; set; }
        public int m_nMargineV { get; set; }
        public int m_nPosX { get; set; }
        public int m_nPosY { get; set; }

        public List<DataEntity> m_pNEXT { get; set; }
    }

我已经尝试使用 Microsoft 的示例进行工具化，但我无法使其正常工作 (https://learn.microsoft.com/en-us/dotnet/framework/wpf/controls/how-to-improve-the-performance-of-a-treeview#code)
它要么显示正确的第一级项目名称而没有展开按钮(以显示其子项目)，要么显示类似“(集合)”的内容

我不是 WPF 专家所以请多多包涵 :)

Answer 1

您必须以递归设置 m_pNEXT 子级的方式设置 HierarchicalDataTemplate，这是一个示例:

WPF:

<TreeView Name="MyTreeView" HorizontalAlignment="Left" Height="177" Margin="126,76,0,0" VerticalAlignment="Top" Width="247">
            <TreeView.Resources>
                <HierarchicalDataTemplate DataType="{x:Type local:DataEntity}" ItemsSource="{Binding m_pNEXT}">
                    <TextBlock Text="{Binding m_dwID}" />
                </HierarchicalDataTemplate>
            </TreeView.Resources>
        </TreeView>

DataContainer 示例:

MyTreeView.ItemsSource = new DataContainer
{
    Entities = new List<DataEntity>
    {
        new DataEntity
        {
            m_dwID = 1,
            m_pNEXT = new List<DataEntity>
            {
                new DataEntity
                {
                    m_dwID = 11
                },
                new DataEntity
                {
                    m_dwID = 12
                }
            }
        },

        new DataEntity
        {
            m_dwID = 2,
            m_pNEXT = new List<DataEntity>
            {
                new DataEntity
                {
                    m_dwID = 21,
                    m_pNEXT = new List<DataEntity>
                    {
                        new DataEntity
                        {
                            m_dwID = 211
                        }
                    }
                }
            }
        }
    }
}.Entities;

结果:

您现在所要做的就是使用 HierarchicalDataTemplate 并根据需要显示每个项目，希望这对您有所帮助!