Никита Науменко's questions

您需要从某个列表填充 TreeView：

var paths = new List<string>
            {
                @"DD\flora\green_tree\tree_0",
                @"DD\flora\green_tree\tree_1",
                @"DD\flora\dead_tree\Dtree_2",
                @"DD\flora\green_tree\tree_3",
                @"DD\flora\green_tree\tree_4",
                @"DD\wall\wooden_wall\wall_0",
                @"DD\window\wooden_window\window_0",
                @"DD\wall\wooden_wall\wall_1",
                @"DD\wall\wooden_wall\wall_2",
                @"DD\flora\green_bush\bush_0",
                @"BD\flora\dead_bush\Dbush_1",
                @"BD\flora\green_bush\bush_1"
            };

我目前正在使用以下代码：

FillingTreeView(MyTreeView, paths, '\\');

private static void FillingTreeView(TreeView treeView, IEnumerable<string> paths, char separator)
{
    TreeViewItem? lastNode = null;
    string subPathAgg;
    foreach (string path in paths)
    {
        lastNode = null;
        subPathAgg = "";
        foreach (string subPath in path.Split(separator))
        {
            subPathAgg += subPath + separator;
            TreeViewItem? nodes = SearchTreeView(subPathAgg, treeView.Items);
            if (nodes == null)
            {
                if (lastNode == null)
                {
                    treeView.Items.Add(new TreeViewItem() { Header = subPath, Tag = subPathAgg });
                    lastNode = (TreeViewItem)treeView.Items[^1];
                }
                else
                {
                    lastNode.Items.Add(new TreeViewItem() { Header = subPath, Tag = subPathAgg });
                    lastNode = (TreeViewItem)lastNode.Items[^1];
                }
            }
            else
            {
                lastNode = nodes;
            }
        }
    }
}
private static TreeViewItem? SearchTreeView(string subPathAgg, ItemCollection Nodes)
{
    TreeViewItem? returnValue = null;
    foreach (TreeViewItem node in Nodes)
    {
        if (string.Equals(((HeaderedItemsControl)node).Tag.ToString(), subPathAgg) == true)
        {
            returnValue = node;
            return returnValue;
        }
        if (node.Items.Count > 0) returnValue = SearchTreeView(subPathAgg, node.Items);
    }
    return returnValue;
}

一切都几乎按其应有的方式进行，但有时结果是这样的：

如您所见，存在重复的“wooden_wall”路径，它们应该是同一节点。这是我第一次使用WPF，希望对您有所帮助。