Accessing all the nodes in TreeView Control

Question

I have a TreeView Control with set of nodes and child nodes. For example:

ROOT has A,B,C.

A has a1, a2, a3 and then

Answer 1

The following code is used for traversing a TreeView's nodes and returning only the leaf nodes:

private IEnumerable<TreeNode> LeafNodes(TreeNode root)
{
    Stack<TreeNode> stack = new Stack<TreeNode>();
    stack.Push(root);
    while (stack.Count > 0)
    {
        TreeNode current = stack.Pop();
        if (current.Nodes.Count == 0)
        {
            yield return current;
        }
        else
        {
            foreach (TreeNode child in current.Nodes)
            {
                stack.Push(child);
            }
        }
    }
}

I use it for accessing the filenames in an explorer-like TreeView:

private void LogFileNames()
{
    //There may be more than one node at root level
    foreach (TreeNode rootNode in FileTreeView.Nodes)
    {
        //Print only filenames, not directories
        foreach (TreeNode leafNode in LeafNodes(rootNode))
        {
            Logger.Info(leafNode.Text);
        }
    }
}