Accessing RadTab in MultiNested Splitter/pane

[David]

Hello,

I face an issue and suspect it is related to nested controls but can't achieve to find out how to solve it;

I have a multiple nest of splitters/pane in a masterpage:

<telerik:RadSplitter ID="MainSplitter" runat="server" Height="100%" Width="100%" Orientation="Horizontal" Skin="Office2007" >
  <telerik:RadPane ID="TopPane" runat="server" Height="64" Scrolling="none" Locked="true">
    <!-- Zone : En-tête -->
    <div class="header"></div>
  </telerik:RadPane>
  <telerik:RadSplitBar ID="RadsplitbarTop" runat="server" CollapseMode="Forward" Visible="true" />
    <telerik:RadPane ID="MainPane" runat="server" Scrolling="None" EnableEmbeddedBaseStylesheet="False" EnableEmbeddedSkins="True" Index="2" Skin="Office2007">
      <telerik:RadSplitter ID="NestedSplitter" runat="server" Skin="Office2007" LiveResize="true">
        <telerik:RadPane ID="LeftPane" runat="server" Width="200" MinWidth="150" MaxWidth="400">
          <!-- Zone : Menu -->
          <asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" ShowStartingNode="False" />
          <telerik:RadTreeView ID="RadTreeView1" Runat="server" Skin="Vista">
          </telerik:RadTreeView>
          <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionStri...></asp:SqlDataSource>
      </telerik:RadPane>
      <telerik:RadSplitBar ID="VerticalSplitBar" runat="server" CollapseMode="Forward" />
        <telerik:RadPane ID="RightPane" runat="server" Scrolling="None">
          <!-- Zone : Childs -->
          <telerik:RadSplitter ID="NestedSplitter2" runat="server" Skin="Office2007" Orientation="Horizontal">
            <telerik:RadPane ID="DescriptionPane" runat="server" Height="96" MinHeight="96" MaxHeight="96" Scrolling="none" Locked="false">
              <fieldset style="width:500px; margin-left:auto; margin-right:auto; margin-top:8px; padding: 8px;">
                <legend style="font-weight:bold; padding-bottom:8px;">
                  <asp:ContentPlaceHolder ID="DescriptionTitle" runat="server"></asp:ContentPlaceHolder>
                </legend>
                <table>
                  <tr>
                    <td style="width: 40px; text-align: center;">
                      <asp:ContentPlaceHolder ID="DescriptionIcon" runat="server"></asp:ContentPlaceHolder>
                    </td>
                    <td style="text-align: left;">
                      <asp:ContentPlaceHolder ID="DescriptionBody" runat="server"></asp:ContentPlaceHolder>
                    </td>
                  </tr>
                </table>
              </fieldset>
            </telerik:RadPane>
            <telerik:RadSplitBar ID="Radsplitbar1" runat="server" CollapseMode="Forward" />
            <telerik:RadPane ID="ContentPane" runat="server" Scrolling="Y" Locked="false">
              <asp:ContentPlaceHolder ID="Main" runat="server">
              </asp:ContentPlaceHolder>
            </telerik:RadPane>
          </telerik:RadSplitter>
        </telerik:RadPane>
      </telerik:RadSplitter>
    </telerik:RadPane>
  </telerik:RadSplitter>

But trying to mimic the Wizard TabStrip Application Scenario I face an "Object Reference not set" error on the line

Dim PlanningTab As RadTab = tabStrip.FindTabByText("Project Planning")

of the script below:

Imports Telerik.Web.UI

Partial Class Local_NewProject_Description
  Inherits System.Web.UI.UserControl

  ...
  Private Sub GoToNextTab()
    Dim tabStrip As RadTabStrip = Page.FindControl("RadTabStrip1")
    Dim PlanningTab As RadTab = tabStrip.FindTabByText("Project Planning")
    PlanningTab.Enabled = True
...

of the code behind of an ascx used in this aspx page:

<%@ Page Title="" Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false" CodeFile="newproject.aspx.vb" Inherits="Local_newproject" %>

<asp:Content... .../asp:Content>
<asp:Content ID="Content4" ContentPlaceHolderID="Main" Runat="Server">
  <telerik:RadTabStrip ID="RadTabStrip1" runat="server">
  </telerik:RadTabStrip>
  <telerik:RadMultiPage ID="RadMultiPage1" runat="server" SelectedIndex="0">
  </telerik:RadMultiPage>
</asp:Content>

Can somebody explain how I can reach the Tab subset and the TabStrip control of this page?
Thank you in advance,
David

[Paul]

Hello David,

As we see  your tabstrip is not defined inline, so we suppose you are adding the tabs from code-behind. If so, we suppose that you are trying to find a tab too early in the page life cycle.

If your problem persists, I think it will be best if you can open a support ticket and send us a simple running project (incl. your custom skin, CSS, images, DB backup if needed and so on) demonstrating the problem (and step-by-step instructions on doing so). In that way we can reproduce and pinpoint the problems you're facing on our side, understand the logic of your application and provide a solution.

Regards,
Paul
the Telerik team

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