如何在TreeView窗口窗体中选择c#子节点

Question

我在窗口表单中有一个树视图。我使用以下函数选择该treeView中的节点。

private void FindAndSelect(TreeNodeCollection collection, object toSelect)
    {
        //problem in this line becouse while converting the toSelect into IstructuredEntity is showing null.

        var entityToSelect = toSelect as Decoupling::IStructureEntity;

        if (entityToSelect == null) //just select the Structure root
        {
            _treeView.SelectedNode = _treeView.Nodes[0];
            return;
        }
        foreach (TreeNode tn in collection)
        {
            var treeNodeEntity = tn.Tag as IStructureEntity;
            if (treeNodeEntity != null && treeNodeEntity.Id == entityToSelect.Id)
            {

                _treeView.SelectedNode = tn;

            }

            FindAndSelect(tn.Nodes, toSelect);
        }
    }

但是上面的函数只能选择treeView中的父节点，我希望选择并突出显示子节点。有谁能告诉我，我需要改变什么才能起作用？

Answer 1

TreeView.Nodes只会给出父节点。您可能必须实现ParentNode.ChildNode来获取树中的子节点。单击这里获取更多信息

foreach (TreeNode tn in treeView1.Nodes)
{
   // get parent node here
   foreach (TreeNode child in tn.Nodes)
   {
     //get child node here
   }
}