Pending Review
Last Updated: 17 Sep 2019 19:30 by ADMIN

We suspect a bug of Telerik controls:


Bug of Telerik: PageView.set_contentUrl(MyUrl) method - call MyUrl twice if RadTabStrip and RadMultiPage is inside RadAjaxPanel control. Firefox only.


It enter here two times:


If try it in chrome - request goes only one time.

If remove RadAjaxPanel - also request goes only one time.


Is it bug of your Controls?

Last Updated: 16 Sep 2019 13:59 by ADMIN
In recent versions of Chrome (76.0.38...) we are experiencing an issue when we display a popup using ShowContentDuringLoad="false". The content goes out of bounds of the window. When that flag is true, the window displays as expected. I tried this using Telerik version 2019.2.514.45.

We've been using Telerik controls for some time and I am aware of the minimum frame height limit imposed by the browser but in this case it does not matter if the window height is 200px or 400px, we are still seeing the same issue.

We are using classic mode for Telerik controls.

See the attached zip for an example project and also a screenshot of what we are seeing.

If I remove the height from the frame in pageLoad() in javascript it displays OK.

oWindow.GetContentFrame().style.height = ""

I can't seem to override using a CSS style, I think the window is using what is stored in cssText.

oWindow.GetContentFrame().style.cssText = "width: 100%; height: 100%; border: 0px; position: absolute; top: -10000px;"

Can you please investigate and fix in Chrome. I would also like to see if you can provide a CSS style work around.

I've tried all sorts of style overrides and cannot seem to find one that works. It looks like whatever is specified in cssText is

what is used for the height.

Thanks for your help,
Last Updated: 09 Sep 2019 10:58 by ADMIN

Hover over the command arrows on the radScheduler when the view is set to month view.  The Tooltip will display "next day" and "previous day" instead of "next month" and "previous month".

The same happens for week view.

Temporary workaround: 

<telerik:RadCodeBlock runat="server">
        function pageLoadHandler() {
            var scheduler = $find("<%= RadScheduler1.ClientID %>");
            var $scheduler = $telerik.$(scheduler.get_element());
            var viewType = "Day";
            if (scheduler.get_selectedView() == Telerik.Web.UI.SchedulerViewType.WeekView) {
                viewType = "Week";
            } else if (scheduler.get_selectedView() == Telerik.Web.UI.SchedulerViewType.MonthView) {
                viewType = "Month";

            $scheduler.find(".rsPrevDay").attr("title", "Previous " + viewType)
            $scheduler.find(".rsNextDay").attr("title", "Next " + viewType)

            // Sys.Application.remove_load(pageLoadHandler);  

Pending Review
Last Updated: 06 Sep 2019 10:59 by ADMIN
The problem happens when you select an item and then press the down arrow button to move it. The item does not move. If you then press the down arrow button a second time, it does move.
Pending Review
Last Updated: 04 Sep 2019 14:59 by ADMIN
Issue 1 - Items in ListBox missing and/or cut off.
Issue 2 - Incorrect highlighting
Issue 3 - Moving items sometimes doesn't work
Issue 4 - Scrolling of items scrolls the whole page instead (sometimes)
Issue 5 - Bottom ListBox cut off (Chrome dev tools, iPhone 5/SE)
Issue 6 - Scrolling in ListBox sometimes selects items
Issue 7 - Sometimes items in the Listboxes cannot be selected at all. (Intermittent)
Last Updated: 03 Sep 2019 16:56 by ADMIN

The Pencil dialog is not positioned properly when the image is zoomed or/and scrolled.

Steps to reproduce:

1. Open
2. Zoom the image to 200%
3. Scroll the image to the right
4. Open the pencil dialog

Result - the dialog appears outside the visible area
Last Updated: 04 Sep 2019 12:51 by ADMIN
Created by: murugesan
Comments: 1
Category: Scheduler
Type: Bug Report

I used "Telerik Ajax Rad Scheduler" using DLL  "Telerik.Web.UI.dll" version "2014.1.225.40", but i got an error "Failed to load resource: the server responded with a status of 404 (Not Found)" and UI styles are only loaded partially.

I also tried the below mentioned steps  provided on the URL , but it did not work. Please  let me know your thoughts and help me to overcome this scenario


Pending Review
Last Updated: 06 Sep 2019 11:14 by ADMIN
Created by: Lou
Comments: 1
Category: TabStrip
Type: Bug Report
The tabs will scroll by themselves even when your finger is off the screen.
Last Updated: 03 Sep 2019 12:00 by ADMIN
Hi, we are having a problem with the column picker, we are trying to move columns and they are getting "stuck". 

The same issue happens in the Telerik online demo page

1. Open the above page using the latest google chrome

2. Open dev tools and pick mobile browser iPhone 5/SE (note: problem also happens on Android)

3. Click the ||| icon on the top right

4. Drag a column up or down using the hamburger icon (3 horizontal lines)

5. It gets stuck
Pending Review
Last Updated: 29 Aug 2019 04:55 by Ronan

I have a Telerik RadGrid, and there is a date column on the grid layout. The date format I am using to display date values is "dd/MM/yyyy". Then, I export that grid data to Excel file with GridExcelExportFormat.Biff type. The problem here is when I open the newly exported Excel file, the date format is changed to "MM/dd/yyyy". 

I want to keep displaying my date format "dd/MM/yyyy" in the Excel file after exporting the grid data.

Pending Review
Last Updated: 12 Aug 2019 13:35 by ADMIN

Issue seems to happen with RadGrid with Bootstrap Skin, RenderMode Lightweight when RequireFieldValidator is enabled in combination with Batch Editing.

Unexpected look (Bootstrap skin):

Other skins seems to have it right.

Expected look (Default skin):

Expected look (Silk skin):


Last Updated: 03 Sep 2019 16:11 by ADMIN
Release R3 2019


1) focus the ComboBox

2) press C 


- Camembert Pierrot is selected

- JAWS pronounces "c" and "Camembert Pierrot"


- Camembert Pierrot is selected

- JAWS pronounces "c"

Reference for expected behavior:

Pending Review
Last Updated: 05 Aug 2019 17:03 by ADMIN


For the date picker and it's family of controls (time picker, date time picker), when using bootstrap skin, lightweight rendering and RTL page, the buttons for the picker are displayed on the wrong side of the control (the right side) instead of being displayed on the left side. I know this can be fixed using some CSS but although the html controls are in order (text and then button both in a container with RTL), the button is stuck to the right side somehow

please advise

Last Updated: 05 Aug 2019 09:43 by ADMIN

The role=textbox is set to the wrapper element instead of the input element itself. That confuses the screen readers such as JAWS, which leads to the Form Fields dialog to skip them. 

As a temporary workaround, the role of the wrapper element with class RadInput can be set to "presentation"

    function pageLoadHandler() {
        $telerik.$(".RadInput").attr("role", "presentation")
        // Sys.Application.remove_load(pageLoadHandler);  

Or using the following script: 

var WebARIAHelper = (function ($) {

  // Assign default ARIA roles to desired elements
  function AssignDefaultARIARoles(element) {
    element = (element || document.body);

    // TFS 110547 - Mark SPAN/DIV around RadInput elements as presentation to avoid confusing JAWS form field dialog
    $("span.RadInput, div.RadInput", element).attr("role", "presentation");
  // Handle AJAX EndRequest event to process any new content
  function WebARIAHelperEndRequestHandler(sender, args) {
    if (args.get_error() == null) {
      // Make sure all page controls can finish their ready event processes before looking at DOM
      window.setTimeout(function () {
      }, 10);
  $(function () {
    // Make sure all page controls can finish their ready event processes before looking at DOM
    window.setTimeout(function () {
    }, 10);

    if (window.Sys && Sys.WebForms && Sys.WebForms.PageRequestManager) {
      var instance = Sys.WebForms.PageRequestManager.getInstance();
      if (instance) instance.add_endRequest(WebARIAHelperEndRequestHandler);

  return null;
)($ || $telerik.$);

Last Updated: 02 Aug 2019 10:12 by ADMIN
Only the selected tab has an aria-selected attribute. According to the documentation I can find, all tabs should have aria-selected, and be set to true or  false as appropriate.

aria-selected (state)§

Indicates the current "selected" state of various widgets. See related aria-checked and aria-pressed.

This attribute is used with single-selection and multiple-selection widgets:

  1. Single-selection containers where the currently focused item is not selected. The selection normally follows the focus, and is managed by the user agent.
  2. Multiple-selection containers. Authors SHOULD ensure that any selectable descendant of a container in which the aria-multiselectable attribute is true specifies a value of either true or false for the aria-selected attribute.

Any explicit assignment of aria-selected takes precedence over the implicit selection based on focus. If no DOM element in the widget is explicitly marked as selected, assistive technologies MAY convey implicit selection which follows the keyboard focus of the managed focus widget. If any DOM element in the widget is explicitly marked as selected, the user agent MUST NOT convey implicit selection for the widget.

Used in Roles:
Inherits into Roles:
falseThe selectable element is not selected.
trueThe selectable element is selected.
undefined (default)The element is not selectable.
Last Updated: 01 Aug 2019 18:12 by ADMIN
When you have both a Detail Item Template and a Detail Table inside a Grid and then when you show a hidden column using the context menu it only shows for the first row and the grid doesn't display properly.  It also throws the javasecript error "Unable to get property '_getVisibleColumnsCount' of undefined or null reference".
Pending Review
Last Updated: 07 Aug 2019 15:21 by ADMIN

Hi, I have trouble with RadScriptManager. I would like combine scripts on page to only one file. But when I enabled it, my site threw javascript error on loading.
Please help me fix it, it would also be better if you can help me understand what happened.

First image is what I set up for RadScriptManager

Secondary image is the error.

I have no idea what's Telerik.Web.UI.Point, I haven't used it anywhere.

Please help me get this error out & fix it.
Thank you.

Last Updated: 31 Jul 2019 08:40 by ADMIN

The problem happens when enter a period . , single ' or " double quote on a new line.

Last Updated: 30 Jul 2019 14:35 by ADMIN

Images with "*.jpeg" extension are saved as "*.jpg" in a different file even if the "Overwrite" option is checked. 

Steps to reproduce:

1. Open an image with "*.jpeg" extension in ImageEditor (e.g. test.JPEG)
2. Edit the image
3. Open the Save Dialog and choose "Save Image On Server" with checked "Overwrite if file exists?" option

Result: The edited image is saved as a new files with jpg extension (e.g. test.jpg)

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