c# - Windows 窗体 TreeView - 绑定(bind)分层递归数据源

Question

我在 Windows 窗体中转换 WPF 客户端，在尝试复制 TreeView 控制结构时遇到了一些问题。

在第一个项目中，我有一个自定义工厂，它从基本上是 XML 的输入字符串开始构建一个结构。 返回类型是一个集合。 自定义树节点:

public class TreeViewNode
{
    public TreeViewNode() { }
    public DocumentKey DocKey { get; set; }
    public string Text { get; set; }
    public IList<TreeViewNode> Children { get; set; }
}

工厂:

public class TreeViewFactory
{
    public IList<TreeViewNode> GetSctructure(DocumentKey docKey, string structure, bool loadAllParents)
    {
        XDocument xmlDocstructure = CommonXmlValueParser.GetXDocument(structure);

        var parentsNodes = (from item in xmlDocstructure.Descendants("structure_item")
                            where (CommonXmlValueParser.GetAttribute(item, "level") == "1")
                            select new TreeViewNode
                            {
                                Text = GetNodeText(item),
                                DocKey = new DocumentKey()
                                {
                                    Bank = docKey.Bank,
                                    Ud = int.Parse(CommonXmlValueParser.GetElement(item.Element("ud"))),
                                    Master = int.Parse(CommonXmlValueParser.GetElement(item.Element("master"))),
                                    NVig = int.Parse(CommonXmlValueParser.GetElement(item.Element("nvig"))),
                                    Subjects = docKey.Subjects
                                },
                                Children = GetChildrenNodes(item, 2, docKey.Bank)
                            }).ToList();

        return parentsNodes;
    }


    private IList<TreeViewNode> GetChildrenNodes(XElement element, int level, int dataBank)
    {
        var childrenNodes = (from item in element.Descendants("structure_item")
                             where (CommonXmlValueParser.GetAttribute(item, "level") == level.ToString())
                             select new TreeViewNode
                             {
                                 Text = GetNodeText(item),
                                 DocKey = new DocumentKey()
                                 {
                                     Bank = dataBank,
                                     Ud = int.Parse(CommonXmlValueParser.GetElement(item.Element("ud"))),
                                     Master = int.Parse(CommonXmlValueParser.GetElement(item.Element("master"))),
                                     NVig = int.Parse(CommonXmlValueParser.GetElement(item.Element("nvig"))),
                                 },
                                 Children = GetChildrenNodes(item, level + 1, dataBank)
                             }).ToList();

        return childrenNodes;
    }
}

绑定(bind):

void CreateTree(object tree, EventArgs e)
{
    //...
    TreeViewFactory treeFactory = new TreeViewFactory();
    var documentStructure = treeFactory.Structure(document.DocumentKey, document.XmlStructure, true);
    this.tabMainControl.document.SetTreeViewStructureNodes(documentStructure);
}

public void SetTreeViewStructureNodes(IList<TreeViewNode> nodes)
{ 
    this.treeView.ItemsSource = nodes;
}

更新:

我使 TreeViewNode 派生自 TreeNode 并更改了方法 SetTreeViewStructureNodes:

private TreeView SetTreeViewStructureNodes(IList<TreeViewNode> nodes)
{
    TreeView treeView = new TreeView();
    treeView.Nodes.AddRange(nodes.ToArray());

    return treeView;
}

仍然没有实现我的目标，因为它仍然没有呈现......

据我所知，在 Windows 窗体中，不可能关联任何类型集合(实现 IEnumerable)的数据源。 除了使用 3rd 方组件，我该如何解决我的问题。我在 WinForms 上的经验很短，就在我学会更好地管理 WPF 时，他们决定转移它:(

感谢您的所有帮助，问候。

更新 2: 填充 treeView 的 WinForms 用户控件片段:

TreeView treeView = (TreeView)documentViewControl.Controls["treeViewStructure"];


TreeViewFactory treeFactory = new TreeViewFactory();
var documentStructure = treeFactory.GetStructure(document.DocumentKey, document.XmlStructure, true);
treeView = this.SetTreeViewStructureNodes(documentStructure);

基本上我要从一个 UC 转到另一个。它们都是 2 个选项卡的一部分，是 TabControl 的子项。

Answer 1

(由 OP 作为问题编辑回答。转换为社区维基答案。参见 Question with no answers, but issue solved in the comments (or extended in chat))

OP 写道:

Actually I got that on my own. The idea is to mutuate the ricursive idea, creating one TreeNode from the collection (IList) of TreeViewNodes. Problem 1: recursion Problem 2: how to mantain the DocKey custom property

private TreeNode[] GetTreeViewNodes(IList<TreeViewNode> nodes)
{
    IList<TreeNode> returnedNodes = new List<TreeNode>();
    foreach (var item in nodes)
    {
        TreeNode node = new TreeNode(item.Text, this.GetTreeViewNodes(item.Children));
        node.Tag = item.DocKey;
        returnedNodes.Add(node);
    }

    return returnedNodes.ToArray();
}

And the code required for the treeview becomes this one:

this.treeView.Nodes.Clear();
this.treeView.Nodes.AddRange(this.GetTreeViewNodes(documentStructure));