Question

I have a TreeView control in a Windows Forms application that is displaying my own subclass of TreeNode. I need to display a number along with each node’s text indicating its position in the tree, like 1 for the root, 1.1 for its first child, 1.2 for its second child, etc. I’m using C# with .NET 2.0

The best that I can come up with is, after the tree is built, go to each node, recursively find the parent and append the parent’s sibling number to the front of the node’s text until you reach the root.

Answer 1

You could use an extension, so you can reuse the code, and get
the path any time you want.

Is bad implemented, but gives you an idea.

public static class Extensions
    {
        public static string GetPosition(this TreeNode node)
        {
            string Result = "";
            BuildPath(node, ref Result);
            return Result.TrimStart('.');
        }
        private static void BuildPath(TreeNode node,ref string path)
        {
            path = "." + node.Index + path;
            if (node.Parent != null) 
                BuildPath(node.Parent, ref path);
        }
    }