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Slider javascript errors

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Slider

This is a migrated thread and some comments may be shown as answers.

maha asked on 09 Jul 2010, 09:59 AM

I have the following page: radlistview with radslider

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>

<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="cc1" %>

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %>

<!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 id="Head1" runat="server">

</head>

<body class="BODY">

<form runat="server" id="mainForm" >

<asp:ScriptManager runat="server" ID="ScriptManager1" EnablePartialRendering="true"

/>

<telerik:RadListView runat="server" ID="RadListView1" DataSourceID="XmlDAtasource2"

AllowPaging="True" PageSize="4"

>

<LayoutTemplate>

<div id="list">

<table><tr><td> <fieldset runat="server" id="itemPlaceholder" /></td>

<td>

<telerik:RadSlider runat="server" ID="RadSlider1"

Orientation="Vertical" MaximumValue="4" Width="150px" CausesValidation="false" OnValueChanged="RadSlider1_ValueChanged" AutoPostBack="true" />

</td></tr></table>

</div>

</LayoutTemplate>

<ItemTemplate>

<fieldset style="float: left; margin: 5px 5px 5px 5px; padding: 2px 2px 2px 2px;

background: #eeeeee" class="myClass" >

<img id="Img1" src='<%# Xpath("src") %>' width="90" height="120" alt="" runat="server"/>

</fieldset>

</ItemTemplate>

</telerik:RadListView>

<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">

</telerik:RadAjaxLoadingPanel>

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="RadSlider1">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadListView1" LoadingPanelID="RadAjaxLoadingPanel1" />

</UpdatedControls>

</telerik:AjaxSetting>

<telerik:AjaxSetting AjaxControlID="RadListView1">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadListView1" LoadingPanelID="RadAjaxLoadingPanel1" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<asp:XmlDataSource ID="XmlDAtasource2" runat="server" XPath="books/book" DataFile="~/generated_files/bitems.xml"/>

</form>

</body>

</html>

and the code behind is :

Imports System

Imports Telerik.Web.UI

Partial Class Default2

Inherits System.Web.UI.Page

Protected Sub RadSlider1_ValueChanged(ByVal sender As Object, ByVal e As EventArgs)

RadListView1.Rebind()

End Sub

End Class

When i run the page i get the following javascript error :

Line: 492
Error: 'Sys.WebForms.PageRequestManager' is null or not an object

And then when i try to press on the slider buttons or slide it i got a javascript error:

Line: 950
Error: Object expected

What am i missing?

I tried to run the demos you have on my pc i received the same javascriot error : Error: 'Sys.WebForms.PageRequestManager' is null or not an object

1 Answer, 1 is accepted

answered on 14 Jul 2010, 12:52 PM

Hi maha,
This error is not directly related to our controls. Please check the following resources that describe common causes for this error:

In case the information in the provided links does not help you, please open a formal support ticket and send me a running test project that demonstrates the problem.

All the best,
Tsvetie
the Telerik team

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