
Thank you
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3 Answers, 1 is accepted
This error occurs if you add the same control twice to the control tree. The PageViewCreated event is fired whenever a new PageView object is added - you need to populate the controls inside the PageViewCreated event.
Regards,
Albert
the Telerik team
Check out Telerik Trainer, the state of the art learning tool for Telerik products.

Thank you Albert for your response,
I am still confused however, my logic seems to follow the online sample, what specifically is missing or is in the wrong place?
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ASPX
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="C_Test.aspx.vb" Inherits="SMARTmig.C_Test" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>C Test</title>
<meta content="Microsoft Visual Studio.NET 7.0" name="GENERATOR" />
<meta content="Visual Basic 7.0" name="CODE_LANGUAGE" />
<meta content="JavaScript" name="vs_defaultClientScript" />
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema" />
</head>
<body>
<form id="form1" method="post" runat="server">
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
</telerik:RadScriptManager>
<telerik:RadAjaxLoadingPanel ID="LoadingPanel1" runat="server">
<table cellspacing="0" cellpadding="15" width="100%" border="0">
<tr>
<td bgcolor="#f3f3f3">
</td>
</tr>
<tr>
<td bgcolor="#f3f3f3">
</td>
</tr>
<tr>
<td bgcolor="#f3f3f3">
</td>
</tr>
<tr>
<td bgcolor="#f3f3f3">
</td>
</tr>
<tr>
<td bgcolor="#f3f3f3">
<asp:Image runat="server" ID="LoadingImage1" ImageUrl="../images/loading.gif" AlternateText="Loading..." />
</td>
</tr>
</table>
</telerik:RadAjaxLoadingPanel>
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
<AjaxSettings>
<telerik:AjaxSetting AjaxControlID="RadTabStrip1">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="RadTabStrip1" />
<telerik:AjaxUpdatedControl ControlID="RadMultiPage1" LoadingPanelID="LoadingPanel1" />
</UpdatedControls>
</telerik:AjaxSetting>
<telerik:AjaxSetting AjaxControlID="RadMultiPage1">
<UpdatedControls>
<telerik:AjaxUpdatedControl ControlID="RadMultiPage1" LoadingPanelID="LoadingPanel1" />
</UpdatedControls>
</telerik:AjaxSetting>
</AjaxSettings>
</telerik:RadAjaxManager>
<script type="text/javascript">
function onTabSelecting(sender, args)
{
if (args.get_tab().get_pageViewID())
{
args.get_tab().set_postBack(false);
}
}
</script>
<table cellspacing="0" cellpadding="15" width="100%" border="0">
<tr>
<td bgcolor="#f3f3f3">
<font face="Arial, Helvetica, sans-serif" color="#732928" size="2"><strong>Click the
tabs below for further details on each phase of the SMART process.</strong></font></td>
</tr>
</table>
<table cellspacing="0" cellpadding="15" width="100%" border="0">
<tr>
<td bgcolor="#f3f3f3" colspan="2">
<telerik:RadTabStrip Visible="true" OnClientTabSelecting="onTabSelecting" ID="RadTabStrip1"
SelectedIndex="2" runat="server" MultiPageID="RadMultiPage1" Skin="Gray" Align="Justify"
Width="800px" Orientation="HorizontalTop">
<Tabs>
<telerik:RadTab Text="Assessment">
</telerik:RadTab>
<telerik:RadTab Text="Definition">
</telerik:RadTab>
<telerik:RadTab Text="Validation">
</telerik:RadTab>
</Tabs>
</telerik:RadTabStrip>
<telerik:RadMultiPage Visible="true" ID="RadMultiPage1" runat="server" SelectedIndex="0"
CssClass="MultiPage" Width="800px" OnPageViewCreated="RadMultiPage1_PageViewCreated">
</telerik:RadMultiPage>
</td>
</tr>
</table>
</form>
</body>
</html>
VB.NET
Imports System.Web.UI.WebControls
Imports System.Data
Imports System.Data.SqlClient
Imports Telerik.Web.UI
Imports Microsoft.VisualBasic
Namespace SMARTmig
Partial Class C_Test
Inherits System.Web.UI.Page
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Protected Sub RadTabStrip1_TabClick(ByVal sender As Object, ByVal e As RadTabStripEventArgs) Handles RadTabStrip1.TabClick
AddPageView(e.Tab.Text)
e.Tab.PageView.Selected = True
End Sub
Private Sub AddPageView(ByVal pageViewID As String)
Dim pageView As New RadPageView()
pageView.ID = pageViewID
RadMultiPage1.PageViews.Add(pageView)
End Sub
Protected Sub RadMultiPage1_PageViewCreated(ByVal sender As Object, ByVal e As RadMultiPageEventArgs)
Dim pageView As New RadPageView()
Dim userControlName As String = e.PageView.ID + "VB.ascx"
Dim userControl As Control = Page.LoadControl(userControlName)
userControl.ID = e.PageView.ID + "_userControl"
e.PageView.Controls.Add(userControl)
End Sub
End Class
End Namespace
ASCX
<%@ Control Language="VB" AutoEventWireup="false" CodeFile="AssessmentVB.ascx.vb" Inherits="Admin_AssessmentVB" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<table cellspacing="0" cellpadding="15" width="100%" border="1">
<tr>
<td bgcolor="#f3f3f3">
<img href="#" alt="" src="../images/org_assess_bckgrd.gif" /><br />
<br />
<font face="Arial, Helvetica, sans-serif" color="#732928" size="2"><strong>Assessment!</strong><br />
<br />
<strong>When to position SMART for your clients:</strong><ul>
<li>They are looking for a role based assessment to control what skills are being assessed
and by whom.</li>
<li>They want to align skills to business needs and direction.</li>
</ul>
</font>
</td>
</tr>
</table>
Please find below a slightly modified version of the JS function that should do the trick.
<script type="text/javascript"> |
function onTabSelecting(sender, args) |
{ |
if (args.get_tab().get_pageView()) |
{ |
if(args.get_tab().get_pageView().get_id()) |
{ |
args.get_tab().set_postBack(false); |
} |
} |
} |
</script> |
Kind regards,
Paul
the Telerik team
Check out Telerik Trainer, the state of the art learning tool for Telerik products.