Urs

I want to populate a TreeView control using C#. It should display the hierarchy of all links ("<A"-tags) in a Html-Page.

The page is crawled recursively, a new recusive call occurs for every direct child html-tag. A new node should be created and added under its respective parent for every a-tag encountered.

The caller clear() the nodes, creates/adds a root node, and starts the recursion (calls AddNode()) the newly created node and the Html-body with all its content.

My problem:

If i blindly create a (sub)node for each html-tag the treeview is built and structured as expected. But if I create a (sub)node for A-Tags (HTML links) only (uncomment all code to do so) i get a flat list instead, no hierarchy at all.

Any suggestions?

Code:

void Caller(){

this.trvUrls.Nodes.Clear();

TreeNode root = this.trvUrls.Nodes.Add(wbIE.Document.Url.AbsoluteUri);

HtmlElementCollection htmlBody = wbIE.Document.GetElementsByTagName("Body");

AddNode(root, htmlBody[0]);

}

private void AddNode(TreeNode oldParent, HtmlElement elt)

{

Regex regex = new Regex("href=..([^\"]*?[\"])");

TreeNode newParent = oldParent;

if (elt.TagName.ToLower() == "a")

{

string tag = regex.Match(elt.OuterHtml).Value.Replace("href=\"", "").TrimEnd('"');

newParent = oldParent.Nodes.Add(tag);

}

foreach (HtmlElement child in elt.Children)

{

AddNode(newParent, child);

}

}