When nodeClick parentNode has collapsed

[Thencho]

Hello!!!

I have a RadTreeView that his nodes always are added dinamically, when the node has expanded I have using LoadOnDemand to search how many childnodes has, up here go well.

But when I click one node that have node.Postback to true (The node postback I will put if It has a navigateUrl), the node that has level 1 has collapsed, this only happen the first time that I do click in this nodo, if I do click to another node, it's happen the same, but only to her parentNode if it's don't expanded before.

I think maybe the treeview state doesn't save the first time that I do click, What can I do?

Thanks

[Thencho]

Hello again, 

I think maybe the treeview state doesn't save the first time that I do click, or the treeview ViewState it doesn't go well.

Is very important that I have solved this problem.

Bye.

[Simon]

Hello Thencho,

Could you elaborate more information on the approach which you are trying to implement? When exactly the problem manifests itself?

Kind regards,
Simon
the Telerik team

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[Thencho]

First I have a list of node like this:

        -client1
        -client2
        -client3
        -client4
        -client5

When I open a client, whit load on demand I execute in node expanded a query that I cacth the projects for this client.

         -client1
        -client2
               -Projects
                    -Project1
                    -Project2
                    -Project3
                    -Project4
                    -Project5
                    -Project6
        -client3
        -client4
        -client5

When I click in Project1, the "projects" node collapse in postback.

[Simon]

Hello Thencho,

RadTreeView should work as expected in the case you have described. However, without looking at your code, it would be difficult to find the cause of this erroneous behaviour.

Could you post the markup of the RadTreeView and any client/server code which works with it?

Thank you in advance.

Best wishes,
Simon
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[Thencho]

Hi

I have do a easy example with this problem, in aspx page I have this:

<asp:ScriptManager ID="ScriptManager2" runat="server">
    </asp:ScriptManager>
    <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
   </telerik:RadAjaxManager>
<telerik:RadTreeView ID="radTreeNav" runat="server" Skin="Default" LoadingMessage="Cargando ..."
                                    LoadingStatusPosition="BeforeNodeText">
                                    <CollapseAnimation Duration="100" Type="OutQuint" />
                                    <ExpandAnimation Duration="100" Type="OutQuart" />
                                </telerik:RadTreeView>
        <asp:Label ID="Label1" runat="server"></asp:Label>

And In the vb code:

 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If Not IsPostBack Then
            Dim newNode As RadTreeNode
            For x As Integer = 0 To 9
                newNode = New RadTreeNode("Nodo" + x.ToString, x.ToString)
                newNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
                radTreeNav.Nodes.Add(newNode)
            Next
        End If
    End Sub

    Protected Sub radTreeNav_NodeClick(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadTreeNodeEventArgs) Handles radTreeNav.NodeClick
        Label1.Text = e.Node.Text
    End Sub

    Private Sub radTreeNav_NodeExpand(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadTreeNodeEventArgs) Handles radTreeNav.NodeExpand
        Dim nodo As New RadTreeNode("Carpeta" + e.Node.Value)
        nodo.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
        e.Node.Nodes.Add(nodo)
        nodo.Expanded = True
        Dim newNode As RadTreeNode
        For x As Integer = 0 To 9
            newNode = New RadTreeNode("Nodo" + e.Node.Value + x.ToString, e.Node.Value + x.ToString)
            newNode.ExpandMode = TreeNodeExpandMode.ServerSideCallBack
            nodo.Nodes.Add(newNode)
        Next
    End Sub

It happens the same problem.

Thanks

[Simon]

Hi Thencho,

Thank you for providing the code.

I managed to reproduce the problem locally. It turned out that this is a bug with the current version of RadTreeView "Prometheus". The state of the first added parent node is not persisted.

One thing you could do is to set the ExpandMode of this particular node to ClientSide instead of ServerSideCallback, since its nodes would have been loaded already. This, however, will affect the node's state only visually.

I have logged this bug to our bug-tracking system. It should be fixed prior to our next official release.

Your Telerik points have been updated for the report.

We apologize for the caused inconvenience.

Best wishes,
Simon
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center