将TreeNodeCollection转换为List<TreeNode>

你可以压扁 TreeNodeCollection 使用以下在.NET 2.0中写入的帮助程序类:

using System.Collections.Generic;
using System.Windows.Forms;
public class NodeHelper
{
    public static List<TreeNode> ToList(TreeNodeCollection nodes)
    {
        List<TreeNode> list = new List<TreeNode>();
        foreach (TreeNode node in ToIEnumerable(nodes))
            list.Add(node);
        return list;
    }
    public static IEnumerable<TreeNode> ToIEnumerable(TreeNodeCollection nodes)
    {
        foreach (TreeNode c1 in nodes)
        {
            yield return c1;
            foreach (TreeNode c2 in ToIEnumerable(c1.Nodes))
            {
                yield return c2;
            }
        }
    }
}

例如,下面的代码将压平 treeView1 在列表中:

List<TreeNode> list = NodeHelper.ToList(treeView1.Nodes);

一种解决方案是:

List<TreeNode> treeNodeList = treeNodeCollection.OfType<TreeNode>().ToList();

另一个:

List<TreeNode> treeNodeList = treeNodeCollection.Cast<TreeNode>().ToList();

foreach循环:

List<TreeNode> treeNodeList = new List<TreeNode>();
foreach (TreeNode item in treeNodeCollection)
    treeNodeList.Add(item);