Get a list of all tree nodes (in all levels) in TreeView Controls

Question

How can I get a list of all tree nodes (in all levels) in a TreeView control?

Answer 1

This code help you to iterate though all TreeView list with identifying current depth level. Code can be used to save TreeView items to XML file and other purposes.

int _level = 0;
        TreeNode _currentNode = treeView1.Nodes[0];
        do
        {
            MessageBox.Show(_currentNode.Text + " " + _level);
            if (_currentNode.Nodes.Count > 0)
            {
                _currentNode = _currentNode.Nodes[0];
                _level++;
            }
            else
            {
                if (_currentNode.NextNode != null)
                    _currentNode = _currentNode.NextNode;
                else
                {
                    _currentNode = _currentNode.Parent.NextNode;
                    _level--;
                }
            }
        }
        while (_level > 0);