[Solved] Nodes.Count always 1

[Reiner Ebel]

Hello,
I create a treeview dynamically in an update panel.

<asp:UpdatePanel ID="UpdatePanel2" runat="server" onload="UpdatePanel2_Load">
    <ContentTemplate>
        <telerik:RadTreeView ID="rtvLayoutListe" runat="server" AutoPostBack="true" Height="450px"
            Skin="Office2007" OnClientNodeClicking="ClientClickHandler"
            oncontextmenuitemclick="rtvLayoutListe_ContextMenuItemClick"
            OnNodeClick="rtvLayoutListe_NodeClick"
            onclientcontextmenuitemclicking="ContextMenuClicking"
            onclientnodeclicked="ClientClickedHandler"
            onclientnodeeditstart="startEdit"
            onnodeedit="rtvLayoutListe_NodeEdit"
            OnClientContextMenuShowing="onClientContextMenuShowing" >
            <ContextMenus>
                ...
            </ContextMenus>

        </telerik:RadTreeView>
    </ContentTemplate>
    <Triggers>
        <asp:AsyncPostBackTrigger ControlID="btnRefresh" />
    </Triggers>
</asp:UpdatePanel>

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        GenerateTreeView();
    }
}

public void GenerateTreeView()
{
    rtvLayoutListe.Nodes.Clear();
    layoutsql lsql = new layoutsql();
    DataSet ds = lsql.GetLayoutsForManager();

    RadTreeNode rootNode = new RadTreeNode("Layouts", "folder-0");
    rootNode.ImageUrl = "../../images/folder.png";
    rootNode.ToolTip = "Layouts - Please select a Layout or Container";
    rootNode.Expanded = true;
    rootNode.ContextMenuID = "RootMainContextMenu";
    rtvLayoutListe.Nodes.Add(rootNode);

    foreach (DataRow folderRow in ds.Tables["LayoutFolder"].Rows)
    {
        RadTreeNode folderNode = new RadTreeNode(folderRow["LgName"].ToString(),
            "folder-" + folderRow["lgid"].ToString());
        folderNode.ImageUrl = "../../images/folder.png";
        folderNode.ToolTip = "Folder";
        folderNode.ContextMenuID = "MainContextMenu";
        rootNode.Nodes.Add(folderNode);
        foreach (DataRow layoutRow in folderRow.GetChildRows("FolderLayouts"))
        {
            RadTreeNode layoutNode = new RadTreeNode(layoutRow["LName"].ToString(),
                "layout-" + layoutRow["LID"].ToString());
            layoutNode.ImageUrl = "../../images/desktop.png";
            layoutNode.ToolTip = "Layout " + layoutRow["LName"].ToString();
            layoutNode.ContextMenuID = "LayoutFolderCMenu";
            folderNode.Nodes.Add(layoutNode);
            foreach (DataRow containerRow in layoutRow.GetChildRows("LayoutContainers"))
            {
                RadTreeNode containerNode = new RadTreeNode(containerRow["CName"].ToString(),
                    "container-" + containerRow["CID"].ToString());
                containerNode.ImageUrl = "../../images/gif.png";
                containerNode.ToolTip = "Layout Container " + containerRow["CName"].ToString();
                containerNode.ContextMenuID = "EmptyFolderContextMenu";
                layoutNode.Nodes.Add(containerNode);
            }
        }

    }



    int anzahl = rtvLayoutListe.Nodes.Count;  =====>>>>>> Always 1

    //if (Session["cnewvalue"] != null)
    //{
    //    if (int.Parse(Session["cnewvalue"].ToString()) > 0)
    //    {
    //        foreach (RadTreeNode node in rtvLayoutListe.Nodes)
    //        {
    //            if (node.Value == tempcontainer)
    //            {
    //                node.Selected = true;
    //                node.Expanded = true;
    //            }
    //            else
    //            {
    //                node.Selected = false;
    //            }
    //        }
    //    }
    //}
}

I get always 1 here: int anzahl = rtvLayoutListe.Nodes.Count;

Reiner

[Roland]

Hello,

The reason that node count is 1 is because you are adding only 1 node as a root node:

 RadTreeNode rootNode = new RadTreeNode("Layouts", "folder-0");
    rootNode.ImageUrl = "../../images/folder.png";
    rootNode.ToolTip = "Layouts - Please select a Layout or Container";
    rootNode.Expanded = true;
    rootNode.ContextMenuID = "RootMainContextMenu";
    rtvLayoutListe.Nodes.Add(rootNode);

To get all nodes count you can do:

rtvLayoutList.GetAllNodes().Count