Last Updated: 18 Jun 2019 13:24 by ADMIN

1. Click somewhere in the page to establish focus.

2. Use the tab key to focus the combo box.  (This works in Chrome, but in IE the control is skipped.)

3. Note that the combo box does not drop-down the list of options like it does when you click the mouse. Clicking the enter key does not drop down the list. Alt-Down-Arrow does not drop down the list.

4. Press Tab and note that focus skips the arrow icon on the combo box and moves down to the "validate with Wave" link.

5. Press Shift-Tab and note that the Arrow icon is now focuses and the enter key will drop down the options list.

6. While JAWS 2019 is running, press the "C" key and note that JAWS reports that there are no combo boxes on the page.



* Jaws is able to properly identify the combo box based on ARIA tags

* Tabbing into the combo box presents the same behaviors as using the mouse button
Last Updated: 14 Jun 2019 08:50 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: 13 Jun 2019 15:33 by Sunil Sutar

Few of our clients reported the following issue with respect to WCAG 2.0 SC 4.1.2 standard. (508 Standard and compliance) -

Practice Function (example)
Ensure sub-lists are marked up properly This UL should only contain li elements (without an ARIA-assigned role), script elements (without an ARIA-assigned role) or template elements (without an ARIA-assigned role); or
elements with a role=listitem attribute; as direct child elements


Example: When Telerik Tabstrip has EnableAriaSupport=true, internally tabstrip is combination of ul-li with css to display the Tabs properly -

The html looks like as follows -  

<ul class="rtsUL">
    <li class="rtsLI rtsFirst" role="tab" aria-disabled="false" aria-level="0" aria-controls="LayoutPageView">
        <a accesskey="L" title="Layout" class="rtsLink rtsBefore" id="LayoutTab" href="#"><span class="rtsOut">
            <span class="rtsIn">
                <span class="rtsTxt">
                    <h2 class="RadTabStrip RadTabStrip_Default"><u>L</u>ayout</h2>
    <li class="rtsLI" role="tab" aria-disabled="false" aria-level="0" aria-controls="SearchPageView" aria-selected="true" id="SearchTabStrip_active_tab">
        <a accesskey="S" title="Search" class="rtsLink rtsSelected" id="SearchTab" href="#">
            <span class="rtsOut">
                <span class="rtsIn">
                    <span class="rtsTxt">
                        <h2 class="RadTabStrip RadTabStrip_Default"><u>S</u>earch</h2>
    <li class="rtsLI rtsLast" role="tab" aria-disabled="false" aria-level="0" aria-controls="ResultsPageView">
        <a accesskey="R" title="Statewide Search Results 0 records" class="rtsLink rtsAfter" id="ResultsTab" href="#">
            <span class="rtsOut">
                <span class="rtsIn">
                    <span class="rtsTxt">
                        <h2 class="RadTabStrip RadTabStrip_Default">Statewide Search<u>R</u>esults (0)</h2>

Observe the aria attributes which are on li elements. Is that really necessary considering the compliance? (as mentioned in practice and example).


Please let me know when are you going to fix this for compliance. 



Pending Review
Last Updated: 13 Jun 2019 12:13 by n/a

There is a bug with combining scripts and resources:

Combined CDN Request for Telerik Controls

You can reproduce the issue in the attached web site sample.

In Development
Last Updated: 11 Jun 2019 13:31 by ADMIN

Using numerictextbox :

- FireFox (rel.67.0.1)  accept non numeric characters.

- IE (rel. 11.461) , correctly, accept only numeric but entering the page in debug mode in Visual Studio, I get the error in attach.

- Edge is ok  





Last Updated: 10 Jun 2019 15:15 by ADMIN
Problem:  Latest Telerik version of Combobox or RadCombobox reads "readonly" though it's not, when EnableAriaSupport is enabled.


url to test with JAWS -

When I use JAWS to read the combobox present on this demo it reads as follows - 
              ComboBox readonly - Alice Mutton. To change the selection press the arrow keys.

Over here, why JAWS is reading "readonly". It's not readonly. It's making our screenreader blind users confusing.

I drilled down more into the problem and found that, the input element below has the aria-readonly=true set though the combobox is not readonly.
Here is the html generated for above combobox from telerik demo site -

<input name="ctl00$ContentPlaceholder1$RadComboBox2" class="rcbInput radPreventDecorate" id="ctl00_ContentPlaceholder1_RadComboBox2_Input" role="combobox" aria-busy="false" aria-disabled="false" aria-expanded="false" aria-haspopup="true" aria-readonly="true" aria-owns="ctl00_ContentPlaceholder1_RadComboBox2_listbox" aria-autocomplete="none" type="text" readonly="readonly" value="Alice Mutton" autocomplete="off">

I understand that this input control should be readonly so that aria users should not type and go haywire. But looks like to maintain the readonly=readonly property, telerik is generating aria-readonly=true for this _Input control and resulting this issue.

When you change this attribute aria-readonly="true" to aria-readonly="false", JAWS read it correctly as follows - 
              ComboBox - Alice Mutton. To change the selection press the arrow keys.

Let me know how to achieve that so that users will not be confused.
Last Updated: 07 Jun 2019 07:52 by ADMIN
Created by: Vessy
Comments: 20
Category: FormDecorator
Type: Bug Report
The checkboxes decorated with RadFormDecorator appeared double in Classic rendering after upgrading to Firefox 63.

Steps to reproduce:
1. Upgrade to Firefox 63
2. Run the following setup
        <telerik:RadFormDecorator runat="server" DecoratedControls="CheckBoxes" RenderMode="Classic" />
        <asp:CheckBox ID="chkApproved" runat="server" Text="asp:Checkbox" />

        <div>Html Input</div>
        <input id="chkApproved1" type="checkbox" name="chkApproved" />


Solutions found so far:
1) Use RadFormDecorator in Lightweight RenderMode:
     <telerik:RadFormDecorator runat="server" RenderMode="Lightweight"/>

2) Set the RadFormDecorator's DecoratedControls="All":
     <telerik:RadFormDecorator runat="server" RenderMode="Classic" DecoratedControls="All"  />

3) Set the ControlsToSkip="CheckBoxes"
      <telerik:RadFormDecorator runat="server" RenderMode="Classic" ControlsToSkip="CheckBoxes"  />

4) Or add the following CSS overwrite to the page:
           .rfdCheckboxUnchecked, .rfdCheckboxChecked {
               padding: 0 !important;
               background-image: none !important;
Last Updated: 07 Jun 2019 07:13 by ADMIN
Created by: Telerik Admin
Comments: 0
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>

Last Updated: 05 Jun 2019 14:44 by ADMIN
Created by: pranav
Comments: 0
Category: Editor
Type: Bug Report
The dopdowns of the tools in the Editor's toolbar are shown below the video objects in the Editor's content area in IE 11.


Steps to reproduce:

1. Open in IE 11:

2.  Insert a video through the Media Manager

3. Click over a tool having a drop-down menu (e.g. the Format tool)

Result: The heavy-weight object of the video is shown above the shown drop-down menu.

Last Updated: 05 Jun 2019 11:26 by ADMIN


I enabled the ShowButton property to the radtextbox, but while writing and the words reach the button I can't see the final of the text. 

<telerik:RadTextBox ID="RadTextBox1" runat="server" ShowButton="true"></telerik:RadTextBox>

If I disable the ShowButton and write something in the radtextbox, I can see the final words. 

How I can fix this? 


Last Updated: 05 Jun 2019 07:41 by ADMIN
Please see demo:

1. tab to calendar button

2. hit enter to open calendar dialog

3. press tab

Notice that instead of causing the focus to move within the calendar pop-up, focus first shifts through all remaining elements of the underlying page. This make this control difficult for users relying solely on keyboard navigation.

Ideally this control should function more like the standard calendar controls, obtaining focus when opened and returning focus to the date field when closed.
Last Updated: 04 Jun 2019 07:50 by Roland Klug
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.
Pending Review
Last Updated: 03 Jun 2019 08:01 by ADMIN
When Grouping in RadGrid while EnableLinqExpressions is set to True and some of the records contain null values will throw the exception: Object cannot be cast to DBNull
Last Updated: 29 May 2019 08:55 by ADMIN
Created by: Sunil Sutar
Comments: 1
Category: TabStrip
Type: Bug Report

Hi Telerik team,


Few of our clients reported the following issue with respect to WCAG 2.0 SC 4.1.2 standard. (508 Standard and compliance) -

PracticeFunction (example)
Ensure ARIA roles, states, and properties are validLI has an aria-level attribute of 0, which is not an integer value greater than, or equal to, 1


Example: visit 


Observe the ul-li elements created for tabstrip. On each li element, there is aria-level attribute whose value is set to 0.

As per WCAG this value should start from 1. The value 0 is invalid. Refer:


Please let me know when are you going to fix this for compliance. 



Pending Review
Last Updated: 29 May 2019 08:28 by ADMIN
Created by: David Hassan
Comments: 1
Category: Grid
Type: Bug Report

To replicate the problem:

  1. Create RadGrid and bind it a datasource
  2. Set ClientSettings - Selecting - AllowRowSelect to true
  3. Set ClientSettings - EnablePostBackOnRowClick to true
  4. Add a GridEditCommandColumn or a ButtonColumn with Edit/Save/Cancel CommandNames
  5. Enable AJAX for the Grid
  6. Run the application in FireFox

Clicking on the Edit button fires the RowClick event of the Grid instead of Edit/Save/Cancel.

Last Updated: 27 May 2019 15:13 by ADMIN
Created by: Randy
Comments: 1
Category: UI for ASP.NET AJAX
Type: Bug Report

I have a RadCheckboxList In an ASP Panel. When Enabling/Disabling the panel the CheckBoxList does not Enable/Disable.  I tested this with a simple mock up with additional controls that work as expected:


<asp:Panel ID="TestPanel" runat="server" Enabled="true">

<telerik:RadCheckBoxList ID="WeeklyDays" runat="server" Columns="4" AutoPostBack="false">


<telerik:ButtonListItem Text="Monday" Value="2" />

<telerik:ButtonListItem Text="Tuesday" Value="4" />

<telerik:ButtonListItem Text="Wednesday" Value="8" />

<telerik:ButtonListItem Text="Thursday" Value="16" />

<telerik:ButtonListItem Text="Friday" Value="32" />

<telerik:ButtonListItem Text="Saturday" Value="64" />

<telerik:ButtonListItem Text="Sunday" Value="1" Selected="true" />



<telerik:RadTextBox ID="TestText" runat="server"></telerik:RadTextBox>

<telerik:RadDatePicker ID="TestDate" runat="server"></telerik:RadDatePicker>


<br />

<telerik:RadCheckBox ID="ToggleEnabled" runat="server" Text="Toggle Panel" AutoPostBack="true" Checked="true" OnCheckedChanged="ToggleEnabled_CheckedChanged"></telerik:RadCheckBox>



 protected voidToggleEnabled_CheckedChanged(objectsender, EventArgs e)


TestPanel.Enabled = Convert.ToBoolean(ToggleEnabled.Checked);


Pending Review
Last Updated: 27 May 2019 13:21 by ADMIN
Created by: Grant
Comments: 1
Category: Grid
Type: Bug Report
If exporting a sorted RadGrid to  Excel XLSX a white space is prepended to the header text in the output file
Last Updated: 22 May 2019 15:38 by ADMIN
Created by: Chris Dalessandri
Comments: 1
Category: UI for ASP.NET AJAX
Type: Bug Report

Reproduction steps:

Go to the Telerik demo at
In the Comment box, type "one two".  Do not let the textbox lose focus.
Highlight "two" and start to drag it to move it before "one". The other text ("one") will disappear, and is gone forever, as far as I can tell.

It can be also reproduced with this configuration:

<telerik:RadTextBox RenderMode="Lightweight" runat="server" ID="RadTextBox3" Width="200px" EmptyMessage="Enter comment" TextMode="MultiLine" Height="100px" Resize="None"></telerik:RadTextBox>

Last Updated: 17 May 2019 06:57 by ADMIN
Created by: Kasim
Comments: 3
Category: PivotGrid
Type: Bug Report

The code in the ASPx file is 

 <DataCellStyle CssClass="cfDataCell" Width="9%"/>

The expected output in the client browser is

 <tr style="height: 35px;">
        <td class="rpgDataCell cfDataCell" style="width:9%;">823</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">2,488</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">7,518</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">10,851</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">13,017</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">13,069</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">13,253</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">12,799</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">9,861</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">4,543</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">2,038</td>
        <td class="rpgDataCell cfDataCell" style="width:9%;">592</td>

However the generated Html is as below:

 <tr style="height: 35px;">
        <td class="rpgDataCell" style="width:9%;">823</td>
        <td class="rpgDataCell" style="width:9%;">2,488</td>
        <td class="rpgDataCell" style="width:9%;">7,518</td>
        <td class="rpgDataCell" style="width:9%;">10,851</td>
        <td class="rpgDataCell" style="width:9%;">13,017</td>
        <td class="rpgDataCell" style="width:9%;">13,069</td>
        <td class="rpgDataCell" style="width:9%;">13,253</td>
        <td class="rpgDataCell" style="width:9%;">12,799</td>
        <td class="rpgDataCell" style="width:9%;">9,861</td>
        <td class="rpgDataCell" style="width:9%;">4,543</td>
        <td class="rpgDataCell" style="width:9%;">2,038</td>
        <td class="rpgDataCell" style="width:9%;">592</td>

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