how to read xml and populate listview

hi experts,  I want to read this xml:

http://www.mercadolivre.com.br/jm/categsXml?as_site_id=MLB&as_max_level=2

and populate an listview with the category, as you can see there is subcategory inside the category, so i want this like an tree-view  but i can't accomplish this, i just don't find the right way to read this xml and process data. I am trying to use xmldatasource but no results. can you guys give me an direction?
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rafaelrglAsked:
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Meir RivkinConnect With a Mentor Full stack Software EngineerCommented:
here how to populate treeview control from your xml url u posted:

        private void populateTreeview()
        {
            WebRequest req = WebRequest.Create("http://www.mercadolivre.com.br/jm/categsXml?as_site_id=MLB&as_max_level=2");
            WebResponse resp = req.GetResponse();
            StreamReader textReader = new StreamReader(resp.GetResponseStream());
            XmlTextReader xmlReader = new XmlTextReader(textReader);

            xmlReader.XmlResolver = null;
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.XmlResolver = null;
            xmlDoc.Load(xmlReader);
            treeView1.Nodes.Clear();
            treeView1.Nodes.Add(new TreeNode(xmlDoc.DocumentElement.Name));
            TreeNode tNode = new TreeNode();
            tNode = (TreeNode)treeView1.Nodes[0];
            addTreeNode(xmlDoc.DocumentElement, tNode);
            treeView1.ExpandAll();

        }
        //This function is called recursively until all nodes are loaded
        private void addTreeNode(XmlNode xmlNode, TreeNode treeNode)
        {
            XmlNode xNode;
            TreeNode tNode;
            XmlNodeList xNodeList;
            if (xmlNode.HasChildNodes) //The current node has children
            {
                xNodeList = xmlNode.ChildNodes;
                for (int x = 0; x <= xNodeList.Count - 1; x++)
                //Loop through the child nodes
                {
                    xNode = xmlNode.ChildNodes[x];
                    treeNode.Nodes.Add(new TreeNode(xNode.Name));
                    tNode = treeNode.Nodes[x];
                    addTreeNode(xNode, tNode);
                }
            }
            else //No children, so add the outer xml (trimming off whitespace)
                treeNode.Text = xmlNode.OuterXml.Trim();
        }

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