Javascript error in R3 2021 SP1 caused by DatePicker with Classic render mode and EnableKeyboardNavigation=true

Progress® Telerik® UI for ASP.NET AJAX Feedback Portal

Create an account Log In

Back to Feed

Request a Feature Report a Bug

Completed

Last Updated: 20 May 2022 09:49 by ADMIN

Release R1 2022

Ryan

Created on: 17 Nov 2021 14:50

Category: Calendar

Type: Feature Request

Javascript error in R3 2021 SP1 caused by DatePicker with Classic render mode and EnableKeyboardNavigation=true

Error message:

Uncaught TypeError: Cannot read properties of undefined (reading '_events')
at Sys.UI.DomEvent.addHandler (Telerik.Web.UI.WebResource.axd:6:57366)
at Telerik.Web.UI.RadCalendar.initialize (Telerik.Web.UI.WebResource.axd:4916:8)
at Telerik.Web.UI.RadCalendar.endUpdate (Telerik.Web.UI.WebResource.axd:6:53689)
at Sys.Component.create (Telerik.Web.UI.WebResource.axd:6:55151)
at Array.<anonymous> (Default.aspx:130:5)
at Telerik.Web.UI.WebResource.axd:6:51370
at Sys._Application._raiseInit (Telerik.Web.UI.WebResource.axd:6:72276)
at Sys._Application.initialize (Telerik.Web.UI.WebResource.axd:6:69772)
at b (Telerik.Web.UI.WebResource.axd:6:71512)
at HTMLDocument.a (Telerik.Web.UI.WebResource.axd:6:71786)

Possible workarounds from Admin:

1) Use Lightweight render mode instead of Classic: https://docs.telerik.com/devtools/aspnet-ajax/controls/render-modes#setting-render-mode

2) Disable temporarily the keyboard navigation of the control

3) Use the attached script and load it on the page:

3.1) Using a RadScriptManager (adjust the file name and path to fit your application)

<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
    <Scripts>
        <telerik:RadScriptReference Path="fix.js" OutputPosition="End" />
    </Scripts>
</telerik:RadScriptManager>

3.2) In an inline script tag somewhere AFTER the ScriptManager(e.g. at the end of the <form> or <body> tag)

3.3) As a script reference - place it AFTER the script manager as 3.2) or use the defer="defer" attribute

<script defer="defer" src="fix.js"></script>

4) Submit a support ticket if you would prefer a custom Telerik.Web.UI.dll assembly with the issue resolved.

2 comments

ADMIN

Vessy

Posted on: 20 May 2022 09:49

Hi Vinay,

The bug discussed in this thread is fixed in our R1 2022 release, so you will need to upgrade to it (or to a later version of the controls) in order to have the fix in your application:

https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2022-(version-2022-1-119)

You can download a fixed version of the controls from the Download section of your Telerik account here (you can change the version from the Version dropdown):

https://www.telerik.com/account/downloads/product-download?product=RCAJAX

Regards,
Vessy
Progress Telerik

Love the Telerik and Kendo UI products and believe more people should try them? Invite a fellow developer to become a Progress customer and each of you can get a $50 Amazon gift voucher.

Vinay

Posted on: 19 May 2022 21:32

How can I get Telerik.Web.UI.dll assembly with the issue resolved ?