New nodes are blank

[Richard]

Hi there,

I'm trying to add nodes to a specific node in a previously databound radtreeview.  

When the page updates, the correct number of nodes are visible in the correct parent node, but they have no text.

 

                Dim current_version_node As RadTreeNode = rtvClientSpecs.FindNode(Function(x) x.FullPath = e.CommandArgument.ToString())
                If current_version_node.Nodes.Count = 0 Then

                    f = oclientContext.Web.GetFileByServerRelativeUrl("/" + e.CommandArgument.ToString())
                    oclientContext.Load(f.Versions)
                    oclientContext.ExecuteQuery()

                    For Each _version As FileVersion In f.Versions
                        If Not _version.IsCurrentVersion Then
                            Dim old_version_node As New RadTreeNode(e.CommandArgument.ToString() + "/" + String.Format("Version {0}", _version.VersionLabel))
                            old_version_node.Value = _version.VersionLabel
                            current_version_node.Nodes.Add(old_version_node)
                        End If
                    Next
                Else
                    current_version_node.Expanded = Not current_version_node.Expanded
                End If

[Richard]

Some followup details:

When I step through the code, current_verison_node.Nodes contains the nodes to be added with all the correct values - including Text and Value.  It's just not displaying anything to the page except the empty nodes.

[Richard]

Nevermind, thanks anyway (for nothing - 4 days and no response, really?).

I will still share my discovery in the hopes that it may help someone else.

The problem was that I was using a template and even though the node was added, it had no idea where to display the data since the template only had the parent nodes in mind. So, adding, and utilizing the existing controls to display the data worked out.   

e.g.

                            ' Display Version
                            Dim lblOldVersion As Label = DirectCast(old_version_node.FindControl("lblOldVersion"), Label)
                            lblOldVersion.Text = String.Format("Version {0}", f.Versions(_version).VersionLabel)

                            ' Display Last updated
                            Dim lblLastUpdated As Label = DirectCast(old_version_node.FindControl("lblLastUpdated"), Label)
                            lblLastUpdated.Text = "  Last Updated " & f.Versions(_version).Created