Combobox don't displays items in updatepanel

2 posts, 0 answers
  1. Hugo
    Hugo avatar
    3 posts
    Member since:
    Oct 2011

    Posted 09 Oct 2011 Link to this post

    I have a page, that has 2 update panels, first with toolbar and second with tabstrip and multipage, from 1 item of my toolbar a usercontrol is loaded in a dinamically created pageview, this usercontrol has a telerik:combobox and a button. When I click the combobox nothing happens, the combobox don't displays items. The items are static, defined in the sme control.

    I paste part of the codes.

    Default.aspx (parent page)
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                            <telerik:RadAjaxPanel ID="ContentPanel" runat="server" Height="100%" Width="100%" EnableAJAX="true" LoadingPanelID="ContentLoading">
                            <telerik:RadTabStrip ID="ContentTabStrip" runat="server" 
                                CausesValidation="False" MultiPageID="ContentMultiPage" SelectedIndex="0" 
                                 Width="100%" ShowBaseLine="True">
                            <telerik:RadMultiPage ID="ContentMultiPage" runat="server" SelectedIndex="0" Height="100%" Width="100%" ScrollBars="Hidden">
                            <asp:AsyncPostBackTrigger ControlID="MenuBar" />

    <%@ Control Language="VB" AutoEventWireup="false" CodeFile="ConfigTemplate.ascx.vb" Inherits="ConfigTemplate" %>
    <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
    <div style="padding: 5px; font-family: Caibri, Arial; font-size: 9pt; border: 1px solid gray; border-top-width: 0px;">
        <telerik:RadComboBox ID="RadComboBox1" runat="server" 
            LoadingMessage="Cargando..." Sort="Ascending">
           <telerik:RadComboBoxItem runat="server" Text="RadComboBoxItem1"  />
           <telerik:RadComboBoxItem runat="server" Text="RadComboBoxItem2" />
           <telerik:RadComboBoxItem runat="server" Text="RadComboBoxItem3" />
        <br /><br />

        <div id="Resultado" runat="server"></div>
        <telerik:RadButton ID="TemplatesCerrar" EnableAjaxSkinRendering="true" runat="server" Text="Cerrar"></telerik:RadButton>
        Se aplicara instantaneamente.

    Is some way to make it work? I'm using 2011 Q2 version of AJAX RadControls
  2. Ivana
    Ivana avatar
    657 posts

    Posted 11 Oct 2011 Link to this post

    Hi Hugo,

    I have noticed that you are making a conditional post back to the server which is initiated by the control with ID="MenuBar". Make sure you have such control on the page.

    Also having RadAjaxPanel inside an UpdatePanel is really not a good approach, since both of them are doing almost the same. For more complex scenarios, we advice to use a RadAjaxManager, about which information could be found here: RadAjaxManager.

    For more information about using a RadAjax in UserControls scenarios, you could refer to the following help article on our website: RadAjax and WebUserControls.

    Hope this helps.

    the Telerik team
    If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed now
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