Last Updated: 16 Mar 2015 14:06 by Eli Avni
I work in an environment of Visual Studio 2013 
C # aspx 
See the attached project.
After pressing the Send key twice, I get the message below.
The control ID is generated automatically by Rad.

Thanks in advance 




Exception details:

Unhandled exception at line 15, column 9936 in http://localhost:53353/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=RadScriptManager1_TSM&compress=1&_TSM_CombinedScripts_=;;System.Web.Extensions,+Version=,+Culture=neutral,+PublicKeyToken=31bf3856ad364e35:he-IL:eb198dbd-2212-44f6-bb15-882bde414f00:ea597d4b:b25378d2;Telerik.Web.UI,+Version=2014.1.403.35,+Culture=neutral,+PublicKeyToken=121fae78165ba3d4:he-IL:64f74e2d-5497-4ab7-8321-89bccc22f4bb:16e4e7cd:86526ba7:874f8ea2:f7645509:24ee1bba:e330518b:1e771326:88144a7a:8e6f0d33:6a6d718d:ed16cbdc

0x800a139e - JavaScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Multiple controls with the same ID 'ctl02' were found. FindControl requires that controls have unique IDs.
Last Updated: 27 Nov 2015 14:38 by Elena
Created by: Maha
Comments: 1
Category: TabStrip
Type: Feature Request
1)If already one tab opened means-->just i want to select tab(without postback)

for that me use set_selected(true) and select().But its also fires OnClientTabSelected Client Side API function.

So how can i achieve this?

 OnClientTabSelecting function available to get focus of user select a tab.Becoz i want two functionality

1)I want  postback for some specific of the tabs when user clicks already opened tabs

2)I want to select a Tab(without postback) when user clicks from Leftmenu(RadPanelBar)

Pls explain with sample code how to achieve both Its very urgent

3) In my left side user control  RadPanelItem me used.Based on this only tabs are opened based

Functionality me need -->whenever user select a already opened tabs its corresponding menu also should select in RadPanelbar(PanelItem)

Me tried this logic
function ClientTabsSelected(sender, args) {
var tab = args.get_tab();

    function GetItemText(currenttabtext) { //This function me put left side user control.

          var panelBar = $find("<%=RadPanelBar1.ClientID%>");

           var currentitem = panelBar.findItemByText(currenttabtext);

           if (currentitem) {


Its works only when panelitem expand.If already selected item in Panelbar collapsed means.Its select properly (rpSelected CSS Class assigned  me find using inspect element)

But its not expand..Please help me solve this also

Please response soon.Its very urgent
Last Updated: 14 Mar 2014 09:21 by Elena
i have create tab by using tabstrip and assing pageview to that tab but on delete of tab the page view is not deleting .for deleteing  i have use close imagebutton,tab will delete but pageview is not delete.pls suggest me how to delete tab alone tab alone with pageview.
Last Updated: 27 Nov 2015 14:41 by ADMIN
This markup:
<Telerik:RadTabStrip ID="detailsStrip" runat="server" MultiPageID="RadMultiPage1"
                            ClickSelectedTab="true" OnTabClick="detailsStrinp_TabClick" SelectedIndex="0"
                            Align="Justify" Orientation="VerticalLeft" EnableEmbeddedSkins="false" AutoPostBack="true"
                            Skin="WFS" ScrollChildren="true" OnClientTabSelected="onTabSelected">
                                <Telerik:RadTab Text="General"  PageViewID="GeneralView">
                                <Telerik:RadTab Text="History" PageViewID="HistoryView">
                                <Telerik:RadTab Text="Dokumenty" PageViewID="DocsView">
                                <Telerik:RadTab Text="AddInfo" PageViewID="AddInfoView">
                                <Telerik:RadTab Text="Gallery" PageViewID="GalleryView">
                                <Telerik:RadTab Text="Process" PageViewID="ProcessView" Visible="false" />
                                 <div class="nav-item">
                                    <div class="nav-item-img"></div>
                                    <div class="nav-item-header"><%# DataBinder.Eval(Container,"Text") %></div>

Generates js issue:
(null reference)
Version: 2012.3.1016.35
Last Updated: 12 Dec 2016 09:05 by ADMIN
Created by: Ivan Zhekov
Comments: 5
Category: TabStrip
Type: Feature Request
Currently the RadTabStrip + Google Maps integration suffers a limitation e.g. if the map is within a hidden tab, there are displacements.