Hi Daniel,

It seems you're adding both nodes to the same tree, resulting in two parent nodes instead of a parent and child node.

Render() method gets hit for each node (regardless of its level), meaning you'll have to add the zNode (from your example) when the "Parent" node is clicked on, and not adding the two at the same time (when "Root" is clicked)

Another thing to be aware of: using Guid.NewGuid() as a value for NodeId is a bad idea as they will all evaluate to -1 (the code that sets the NodeId accepts a string but will try to convert to an int (hence the -1 value when TryParse() fails)

Have a look at my article on how to build multi level navigation trees in a custom section (and avoid the pittfals you're experiencing now)

Hope this helps.

Regards,

/Dirk

Dirk, thanks for your reply I have followed the first part of your tutorial which is great, but still can't get the child node to display. I just realised I am using Umbraco 4.1 does this change anything? The following code displays the parent but doesn't display the child.

public override void Render(ref XmlTree tree) {
            if (this.id == -1) {
                var node = XmlTreeNode.Create(this);
                node.NodeID = "nParent";
                node.Text = "Parent";
                node.Icon = FolderIcon;
                node.OpenIcon = FolderIconOpen;
                node.Action = string.Format("javascript:openChildren('{0}');", node.NodeID);
                node.Source = GetTreeServiceUrl(node.NodeID);
                tree.Add(node);
            } else {
                var zNode = XmlTreeNode.Create(this);
                zNode.NodeID = "1";
                zNode.Text = "Child";
                zNode.Icon = FolderIcon;
                zNode.Action = string.Format("javascript:openChild('{0}');", zNode.NodeID);
                zNode.Source = GetTreeServiceUrl(zNode.NodeID);
                tree.Add(zNode);
            }
        }

Daniel,

it shouldn't make a difference (*should* as in I haven't tried it yet on a v4.1 install), but still I think you're getting into trouble...

your statement 

var node = XmlTreeNode.Create(this);
node.NodeID = "nParent";

combined with .

node.Source = GetTreeServiceUrl(node.NodeID);

will not work as it will always revert to -1 as the NodeId when using GetTreeServiceUrl() (one of the things I'm warning for in my tutorial)

I presume you're getting something like:

-Parent
--Parent
---Parent
----Parent

you're going to have to use NodeKey to distinguish between different nodes (and different level of nodes) and use the value of this.NodeKey instead of this.id, unless you can set a unique id for each of the node in the tree (as in the Content tree)

Let me know if you still don't get it to work.

Cheers,

/Dirk

I have been able to get the following structure:

- Root
  - Parent

I pretty much copied your code to see if I could get this working and still no joy. I assume I am missing something simple here...

if (this.NodeKey == string.Empty) {
                var node = XmlTreeNode.Create(this);

                node.NodeID = "A";
                node.Text = "A";
                node.Icon = FolderIcon;
                node.Action = string.Format("javascript:openCustomersPage('{0}');", node.NodeID);

                node.Menu.Clear();
                node.Menu.AddRange(new List<IAction> { ActionNew.Instance, ActionRefresh.Instance });

                TreeService treeService = new TreeService(-1, TreeAlias, ShowContextMenu, IsDialog, DialogMode, app, string.Format("Letter-{0}", "A"));

                node.Source = treeService.GetServiceUrl();

                tree.Add(node);
            } else {
                XmlTreeNode node = XmlTreeNode.Create(this);

                node.NodeID = "3432";
                node.Text = "Sample Customer";
                node.Icon = FolderIcon;
                node.Action = string.Format("javascript:openCustomerPage('{0}');", node.NodeID);

                node.Menu.Clear();
                node.Menu.AddRange(new List<IAction> { ActionRefresh.Instance });

                TreeService treeService = new TreeService(-1, TreeAlias, ShowContextMenu, IsDialog, DialogMode, app, string.Format("NorthwindCustomer-{0}", "1"));

                node.Source = treeService.GetServiceUrl();

                tree.Add(node);
            }

Hi Daniel,

Code seems fine to me... I think it's time for a debugging session... I'd suggest to attach debugger and check how the Render() method gets hit for each of the nodes in the content tree.

Let us know what you find out.

Cheers,

/Dirk

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