Last Updated: 18 Oct 2019 13:52 by ADMIN
Release R3 2019 SP1
Created by: Charles Liang
Comments: 0
Category: Editor
Type: Feature Request
Improve XSS filtering.
Pending Review
Last Updated: 17 Oct 2019 08:39 by ADMIN
Created by: Jeff
Comments: 1
Category: TabStrip
Type: Bug Report

Accessibility Insights is reporting invalid markup on all tabs in the TabList.

When consulting the online aria specifications I see that elements with role="tablist" support aria-level="#" where number is > 0.  ( However, elements with role="tab" do not. (

If possible, we would like to see the aria-level tag moved to the correct page elements in the next release. (Thanks for correcting the aria-level="0" problem previously.) 

I believe this may be the compliance issue Sunil was reporting previously here:

Last Updated: 15 Oct 2019 10:30 by ADMIN
Created by: Pheath
Comments: 1
Category: Grid
Type: Feature Request


It would be nice to be able to clear the filter for each column as opposed to creating an external button to clear all filters. I was thinking of similar to below.

Pending Review
Last Updated: 11 Oct 2019 13:15 by ADMIN
Created by: Doug
Comments: 1
Category: UI for ASP.NET AJAX
Type: Feature Request


Our O365 users  see 'Excel on the screen'  so it should behave the same, its Excel in a the browser - which means the Ajax controls are competing with this.
Which means our code is crap because there is a difference in investment between us and Microsoft, we are also burdened with the feature that uses are lazy and dont want to think for themselves, the computer is meant to do thier job for them (so why employ them). 
We also use MS Teams here that allows Excel documents to be used in the Browser, Teams joins sharepoint and skype. 

It would be nice to you to look how your controls might integrate with Office 365  tooling, there is enormous traction in the market with MS Teams and O365 so I imagine the AJAX document sources would need O365/azure examples soon.

It matters that you have a skin that allows users to perceive that this app is just like O365, and the same assumptions can be made about the UX, this lifts a lot of the burden for the developers in training, when the affordance of O365 App and Telerik Apps are the same.

I would appreciate a set of demo examples that connect in to Azure/O365 and equally Dynamics365 (BizTalk) because of the traction in the O365 space, the amount of process automation in businesses across the UK and Europe. So many of the Telerik controls looks like desktop controls, many are better it would be useful to show just how easy it is connect into O365, maybe create a Graph Query connector or a sample O365 connector that covers the CRUD operations for office docs.

Thanks in advance 

Pending Review
Last Updated: 11 Oct 2019 07:22 by ADMIN



I would like to highlight a GridLine based on a Labelled item when I have implemented skip in the HTML Chart. 


Essentially, I have a series of days and would like to step the labels on a weekly basis. At each step I would like to highlight the GridLine associated with the label.

Last Updated: 10 Oct 2019 15:19 by ADMIN

I found issue here in your forum and received an updated fix.

However, the sample fix has the grid name ("RadGrid1") hard-coded in the method "function OnClientHidden(sender, args)". In our code we need to use this for many grids; each with its own name. Please show me how to obtain the grid name generically; preferably from the arguments (sender, args).

Also in the example the checkbox isn't explicitly declared; I assume the code is using some implicit name. However, in our code the name of the checkbox is declared (see below my signature). Please show me how to change the code to use different checkbox names. 

In Development
Last Updated: 09 Oct 2019 14:46 by ADMIN

In version R3 2019 (2019.3.917), the following issue is observed with various date pickers: 

Reproduction code and steps:

<telerik:RadDateTimePicker RenderMode="Lightweight" ID="RadDateTimePicker1"  runat="server" >

1) open date picker, 
2) click on the month/year to open the MonthYearFastNavigation
3) Click Ok or Cancel

Expected: date selected
Actual: JavaScript error: Uncaught TypeError: Cannot read property '_popupButton' of null

Last Updated: 09 Oct 2019 13:31 by ADMIN
Created by: Ralf
Comments: 0
Category: FileExplorer
Type: Feature Request
I want to easily implement to the FileExplorer Control a download feature for every file type and size.

Can you please provide a simple solution for that (e.g. a Property  .DownloadAllFiles) or a simple code. E.g. the workaround with the Handler is for me not a good solution. (security because of the URL)

e.g. with this control a simple Download is for every filetype possible:
Last Updated: 08 Oct 2019 08:13 by ADMIN
Created by: Vasssek
Comments: 1
Category: Input
Type: Bug Report


I have problem with typing into RadMaskedTextBox. I detected that problem is causing MaxLength property. In IE11, Chrome and Firefox, everything is working fine, but in Edge user couldn't type text into input.

<telerik:RadMaskedTextBox ID="txt_PFR1" runat="server" Width="110px" TabIndex="1" 
                                                    MaxLength="5" Mask="PFRaa">

Result text should be PFR and two characters, e.g. PFR12 or PFRaX, or... 

I suppose that this property is useless in this control instead of RadTextBox. Could you please remove it, if it doesn't have any other usage purpose ?




Pending Review
Last Updated: 08 Oct 2019 03:03 by Kasim
Created by: Kasim
Comments: 2
Category: Window
Type: Bug Report

Bug 1:

When RadWindow behavior is set to Maximize/Minimize only, the expected behavior is while minimized, it must only show Maximize button and when maximized, it should show minimize button. 

Currently, it is showing restore button on minimizing and then it restores to a random size.

Bug 2:

Page reloads on maximizing the minimized page.

  1. If the page requires authentication, the user has to login again.
  2. If the user is on some of the internal pages on a portal, the user is redirected to the login page without referer URL.
Last Updated: 07 Oct 2019 18:35 by John
Created by: Rumen
Comments: 3
Category: ScriptManager
Type: Feature Request
Subresource Integrity is a fairly new security scheme for protecting against malicious script obtained from third-party source (CDNs). It requires that the script tag include a hash of the script content so the browser can verify that it has not been altered.

Telerik controls generate a bunch of script tags for It would be swell if the script tags would include the extra attributes necessary to implement subresource integrity. Is this in the roadmap? 

Mozilla provides a security analysis tool which highlights this issue. Look at the results for here -> 

More info available on
Last Updated: 07 Oct 2019 12:18 by ADMIN
Created by: Thomas
Comments: 1
Category: SearchBox
Type: Bug Report
The Tooltip property of the SearchBoxButton in the Buttons collection of the RadSearchBox is not rendered on the button element client-side.
Last Updated: 04 Oct 2019 15:36 by ADMIN
In Development
Last Updated: 04 Oct 2019 15:06 by ADMIN
In Development
Last Updated: 04 Oct 2019 14:00 by ADMIN
Created by: Telerik Admin
Comments: 2
Category: FormDecorator
Type: Bug Report
 FireFox 65 again changed its behavior and breaks the behavior of our 2019 R1 SP1 release., introducing a fix for the following bug:

If you are using the controls from 2019 R1 SP1 or later, you can use the following workaround in order to make the input elements visible until we include the fix internally:

<style> .t-ff input[type=checkbox].rfdRealInput, .t-ff input[type=radio].rfdRealInput { position: static; } </style>

Pending Review
Last Updated: 04 Oct 2019 10:27 by Jerry

Requesting the improvement of this functionality to include scrolling.


Brief summary of the issue:

MultiCell selection uses a virtual marque tool to select items and does not include items that are out of view.

Last Updated: 03 Oct 2019 15:43 by ADMIN

The RadWindow width and height are not persisted when the control has been minimized before a PostBack (or navigation to another page).

Steps to reproduce:

1. Run the code below.
2. Click the "Open" Button
3. Minimize RadWindow
5. Click the "PostBack" button
6. Maximize RadWindow

Result: The restored RadWindow has wrong size

        <telerik:RadButton ID="Btn1" runat="server" Text="Open" AutoPostBack="false" OnClientClicked="openFirst"></telerik:RadButton>
        <br />
        <telerik:RadButton runat="server" ID="RadButton1" Text="Postback" AutoPostBack="true" />

        <telerik:RadWindowManager ID="RadWindowManager1" runat="server" EnableViewState="false" PreserveClientState="true">
                <telerik:RadWindow ID="radWindow_Evidence" runat="server" Title="Evidence" EnableViewState="false" AutoSize="false" DestroyOnClose="true" ReloadOnShow="true"
                    VisibleTitlebar="true" VisibleStatusbar="false" Width="900px" Height="500px"
                    Behaviors="Close,Minimize,Move,Resize,Maximize" Left="320px" Top="0px">
                        Some content

            function openFirst() {
                radopen(null, "radWindow_Evidence");

Last Updated: 03 Oct 2019 15:11 by ADMIN
Hello guys,


We've faced an issue with menu on several RAD controls when running on MacOS 10.14.x (Mojave) with FireFox 66.0.x (Quantum).

Using touchpad or mouse, when right clicking for context menu, it just flashed and doesn't stay open: it opens and then suddenly closes.

We are using Telerik Asp.Net Ajax version 2017.2.503.40 but it can be also replicated on your demo version:

Not sure if you can provide a fast workaround for this but I just wanted to let you know.

I've checked for some open cases before creating this thread and hope I didn't duplicate something. Please move/close it if necessary.



Andrei V.
Last Updated: 02 Oct 2019 18:56 by ADMIN
When loading custom skin trough  RadSkinManager -> Skins -> SkinReference.Path, the logic inside RadSkinManager.FillNonEmbeddedSkinsInfo does not work correctly: in order to load ComboBox.MySkin.css, per say, it requires ComboBox folder to be present inside the custom skin folder.
Last Updated: 02 Oct 2019 15:04 by ADMIN
Created by: mqsash
Comments: 2
Category: InputManager
Type: Feature Request
When RadText boxes have EnableAriaSupport=True and also have a tooltip set, the JAWS form fields dialog should list the control along with any text that might be in the textbox.
Currently it does not list the text.
see following support ticket for more details:
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