Is NodeDataBound called recursively?

[Michal]

Hi,
I am completely new to telerik... We are about to buy but I am having some troubles to get started ..
I try to bind the treeview to the following structure:

- Assessment
  - Folder
    - Folder
    ....
- Assessment

(assessment is an own domain object and folder too)

I am getting all assessment as a list<Assessment> and those can contain 0-n folders. I tried to bind the treeview to the assessments and call the assessments Folders property within NodeDataBound.

Thats the page_load:

protected void Page_Load(object sender, EventArgs e) {
        if (!IsPostBack) {
            RadTreeView1.DataSource = new NHibernateDaoFactory().GetTagGroupDao().GetAll();
            RadTreeView1.DataBind();
            RadTreeNode untaggedNode = new RadTreeNode(GetLocalResourceObject("res_untagged").ToString(), "");
            untaggedNode.AllowDrag = true;
            untaggedNode.Checkable = true;
            RadTreeView1.Nodes.Add(untaggedNode);

            uxTreeAssessments.DataSource = new NHibernateDaoFactory().GetAssessmentDao().GetAll();
            uxTreeAssessments.DataFieldID = "ID";
            uxTreeAssessments.DataValueField = "ID";
            uxTreeAssessments.DataTextField = "LocalizedName";
            uxTreeAssessments.DataBind();
        }
    }

And then the nodedatabound:

protected void uxTreeAssessments_NodeDataBound(object sender, Telerik.Web.UI.RadTreeNodeEventArgs e) {
        if (e.Node.Level == 0) {
            Assessment a = e.Node.DataItem as Assessment;
            foreach (Folder f in a.Folders) {
                RadTreeNode n = new RadTreeNode(
                    string.Format("{0} ({1})", f.LocalizedName, f.Questions.Count),
                    f.ID.ToString());
                n.DataItem = f;
                e.Node.Nodes.Add(n);
            }
        } else if (e.Node.Level > 0) {
            Folder parent = e.Node.DataItem as Folder;
            foreach (Folder f in parent.Folders) {
                RadTreeNode n = new RadTreeNode(
                    string.Format("{0} ({1})", f.LocalizedName, f.Questions.Count),
                    f.ID.ToString());
                n.DataItem = f;
                e.Node.Nodes.Add(n);
            }
        }
    }

The problem is that the ELSE IF part is never called ... and thus the sub folders of the folders are not rendered.

Any assistance would be appreciated as I am stuck here.. Not even sure if the approach is correct.
Thanks!!

[Michal]

No one can help nor can anyone give feedback?
Best regards
Michal

[Atanas Korchev]

Hi Michal,

I think in your case RadTreeView creates only root nodes during databinding. You need to set the DataFieldID/DataFieldParentID properties in order to create node hierarchy. You can check this help topic and this online example for more info.

Sincerely yours,
Albert
the Telerik team

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