Last Updated: 11 Aug 2020 10:18 by ADMIN
Created by: Chris Vaughn
Comments: 0
Category: MultiSelect
Type: Bug Report

Scenario 1)

- Set MultiSelect1.Enabled=false; 
- Do a postback;

Expected: MultiSelect remain disabled
Actual: MultiSelect gets enabled

Workaround: set MultiSelect1.Enable = false instead of .Enabled.

Scenario 2)

- Add a MultiSelect inside asp:Panel
- Disable the asp:Panel

Expected: MultiSelect is disabled
Actual: MultiSelect remains enabled


Last Updated: 10 Aug 2020 16:04 by ADMIN
Release 2020 R2 SP1

Hello All,

I'm using a couple of Radbuttons to enable users to download some forms (in Word). This has stopped working in Chromium based browsers for some reason (new Edge, Chrome). It still works in Internet Explorer. No errors in the browser DevTools and no error on the server either.
It also does not work in Cassini (VS2017).

Not sure where to go from here - can anyone confirm/deny?

TIA - Marcus.

code stub:

<telerik:RadButton ButtonType="LinkButton" RenderMode="Lightweight" ID="btnName" runat="server" Text="Button Text" CssClass="TemplBtn" NavigateUrl="~/assets/someform.docx">
         <Icon PrimaryIconCssClass="rbDownload" />


Last Updated: 05 Aug 2020 13:46 by ADMIN
Release R3 2020
Created by: SUNIL
Comments: 2
Category: FormDecorator
Type: Bug Report
ISSUE: Screenshot of this issue can be seen at :
(1) https://goo.gl/knpdiq 
(2) and also at https://goo.gl/8tDqKe. 

The issue is that the drop down width is not matching the width of top part when a select element is styled by FormDecorator. I am using the latest version i.e. 2017.3 913.

Go to the demo page of FormDecorator at http://demos.telerik.com/aspnet-ajax/formdecorator/examples/overview/defaultcs.aspx.
Expand the only select element on this demo page and you will notice that drop down width is not matching the top part width.

When I tried to resolve this problem, I came up with a solution that works across all skins and render modes as well as all modern browsers of Chrome, Firefox, Opera, Edge + IE 9,10 and 11. 

The solution involves overriding the method Telerik.Web.UI.RadFormDecorator.prototype._expandHeader.  JavaScript for overriding this method is given in attached file. Just copy this script and paste in anywhere in your aspx page to resolve this issue.
Last Updated: 05 Aug 2020 08:46 by ADMIN
Release R3 2020
Copied line-spacing content from MS Word are not retaining same paragraph spacing because RadEditor strips the line-height style.
Last Updated: 04 Aug 2020 13:11 by ADMIN
Release R3 2020

Screenshot of this issue can be seen at https://goo.gl/c9WriW
Also, a video of this can be seen at https://goo.gl/d4nnKq

This issue occurs in Lightweight or Mobile render mode. In classic render mode, this issue does not exist.


Use the following page markup to reproduce this problem.

<%@ Page Language="C#" AutoEventWireup="true" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <form id="form1" runat="server">
        <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js"></asp:ScriptReference>
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js"></asp:ScriptReference>
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js"></asp:ScriptReference>
        <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" RenderMode="Lightweight" Skin="MetroTouch">
                <telerik:TargetControl ControlID="RadFormDecorator1" />
        <telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" DecoratedControls="All" RenderMode="Lightweight" ControlsToSkip="None" />
        <select id="ddl2" runat="server" style="width: 175px;">
            <option value=""></option>
            <option value="dallas">Dallas</option>
            <option value="chicago">Chicago</option>
            <option value="toronto">Toronto</option>
            <option value="austin">Austin</option>

        <button id="btn1">Postback</button>


Add the following style in your aspx head part based on the skin you are using for FormDecorator.

If skin is any one these big skins -  MetroTouch or BlackMetroTouch or Material or Silk or Glow or Bootstrap, then use the style below.
        div.rfdSelectBox ul li {
            min-height: 16px;

        .rfdSelect {
            min-height: 32px !important;

For all other skins, use the style element as below.

        div.rfdSelectBox ul li {
            min-height: 16px;

        .rfdSelect {
            min-height: 32px;
Under Review
Last Updated: 04 Aug 2020 11:17 by ADMIN
When setting client events in a RadTextBox and using an EmptyMessage, the EmptyMessage will trigger the event on page load.  This is true for a multiple TextMode but others are untested. 
Last Updated: 24 Jul 2020 11:36 by ADMIN
Last Updated: 22 Jul 2020 16:04 by ADMIN
Created by: Thomas Brown
Comments: 3
Category: Grid
Type: Bug Report

To reproduce the issue enable RowSelect and RowsDragDrop ClientSettings, and attach OnRowDropping  event listener

<ClientSettings AllowRowsDragDrop="true">
    <Selecting AllowRowSelect="true" />
    <ClientEvents OnRowDropping="function() {alert('RowDrooping event fired!');}"/>

Last Updated: 22 Jul 2020 12:25 by ADMIN
Created by: P L P
Comments: 1
Category: UI for ASP.NET AJAX
Type: Bug Report

Hi Team,


I'm using Telerik.Web.UI Version 2020.2.617

I have integrated it and added a reference in my web application, asked me to upgrade the version of Assemblies "System.Web.Extension.dll" and "System.Core.dll" has to be upgraded to version 4.0, I did that too, Now I'm getting an error while I'm running or doing build "The type or namespace name 'Script' does not exist in the namespace 'System.Web' (are you missing an assembly reference?)", Assembly it is referring to "System.Web.Script.Services", same error is coming for other attributes like "ScriptMethod, ScriptMethodAttribute"

For the Key word "this" it is throwing as below error

It is throwing an error for "System.Linq.Expressions"




Can anyone help me out on this how to resolve these bugs.



P L P Kumar

Last Updated: 22 Jul 2020 11:12 by ADMIN
Here is how to reproduce the problem on a MAC:

yorosiku (よろしく) onegai (お願い) itasimasu (いたします。)

These are the letters (and corresponding Japanese) we type to write the sentence.
We first type these three segments all together and press the Shift key to change the
characters of each segment, but if we press the Shift more than once (pressing Shift more than
once is necessary to get the right characters), it automatically copies and pastes or erases
random segments.
Last Updated: 21 Jul 2020 11:17 by ADMIN

Links inside RadGrid are failing Contrast tests with ANDI tool:

<telerik:RadButton runat="server" ID="RadButton1" Text="Hide Grids with no Contrast issues" AutoPostBack="false" OnClientClicked="OnClientClicked" />
    function OnClientClicked(sender, args) {
        var $ = $ || $telerik.$;
        var failingSkins = []
        $(".RadGrid").each(function () {
            var grid = $(this)
            if (grid.find(".ANDI508-element-danger").length == 0) {
            } else {

<a href="javascript:void((function(){andiScript=document.createElement('script');andiScript.setAttribute('src','https://www.ssa.gov/accessibility/andi/andi.js');document.body.appendChild(andiScript)})());">Run ANDI tool</a>
<br />
<telerik:RadSkinManager ID="RadSkinManager1" runat="server"></telerik:RadSkinManager>
<asp:Repeater runat="server" ID="Repeater1" OnItemDataBound="Repeater1_ItemDataBound">
        <hr />
        <div class="container">
            <asp:Label Text="Label1" CssClass="label" ID="Label1" runat="server" />
            <telerik:RadGrid ID="RadGrid1" RenderMode="Lightweight" runat="server" AllowPaging="True" CellSpacing="0"
                GridLines="None" Width="800px" PageSize="10" OnNeedDataSource="RadGrid1_NeedDataSource"
                <MasterTableView AutoGenerateColumns="False" DataKeyNames="OrderID">
                        <telerik:GridHyperLinkColumn DataTextField="ShipName" DataNavigateUrlFields="OrderID" DataNavigateUrlFormatString="https://google.com/search?q={0}" Target="_blank"></telerik:GridHyperLinkColumn>



protected void Page_Load(object sender, EventArgs e)
    Repeater1.DataSource = RadSkinManager1.GetSkinChooser().Items;
protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
    (sender as RadGrid).DataSource = Enumerable.Range(1,70).Select(x=> new { OrderID = x, ShipName = "Ship name #" + x });

protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
    var grid = e.Item.FindControl("RadGrid1") as RadGrid;
    if (grid != null)
        var skin = (e.Item.DataItem as RadComboBoxItem).Text;
        grid.Skin = skin;
        (e.Item.FindControl("Label1") as Label).Text=skin;


Last Updated: 21 Jul 2020 09:50 by ADMIN
Scheduled for R3 2020
Created by: Chandler
Comments: 0
Category: Calendar
Type: Bug Report
Improve the use of HiddenField inputs' values.
Last Updated: 21 Jul 2020 09:28 by ADMIN

Reproduction steps:

  1. For RadGrid set RenderMode="Mobile" and EnableHeaderContextMenu="true"
  2. For Grid Column set Groupable="false"
  3. Try to group by the non-groupable column - http://somup.com/cYirQb6fqR
Last Updated: 17 Jul 2020 15:07 by Diogo Mendonça
Created by: Diogo Mendonça
Comments: 2
Category: AsyncUpload
Type: Bug Report


I have a problem with postback on RadAsyncUpload in my project.

So, I created a simple project, with your example (https://docs.telerik.com/devtools/aspnet-ajax/controls/asyncupload/how-to/how-to-persist-uploaded-files) and the problem remains.

if I define PostbackTriggers on the aspx page, after the post back, I can see the files uploaded on the page, but the UploadedFiles.Count in code behind returns zero.

<telerik:RadAsyncUpload runat="server" ID="RadAsyncUpload1" PostbackTriggers="Button3,Button4"></telerik:RadAsyncUpload>

if I define PostbackTriggers on the aspx.vb page, after the post back I can't see the files uploaded on the page, but the UploadedFiles.Count in code behind returns 1.

RadAsyncUpload1.PostbackTriggers = New String() {Button1.ClientID, Button2.ClientID}


So, there is no way to, after the postback, present the uploaded files in page and values in  RadAsyncUpload.UploadedFiles.


Please, check the attach files.

Best Regards,

Mauro Santos

Last Updated: 13 Jul 2020 10:20 by ADMIN
Created by: Mamallan
Comments: 0
Category: Spreadsheet
Type: Bug Report

Link is not clickable when situated in a disabled cell.

Steps to reproduce.

1. Place a link in a cell or a range of cells

2. Disable the cell (range)

3. Click the link

Last Updated: 09 Jul 2020 12:28 by ADMIN
Created by: Mamallan
Comments: 1
Category: Spreadsheet
Type: Bug Report

The issue is replicated when the spreadsheet is higher than the screen height. To reproduce it, scroll the page and click the last visible cell. 

Result: The page is scrolled to the beginning of the Spreadsheet element

Expected: The page is not scrolled

<telerik:RadSpreadsheet runat="server" ID="RadSpreadsheet1" Height="2000px" Width="100%">


Last Updated: 03 Jul 2020 11:58 by ADMIN

In lightweight the issue is not observed:

<telerik:RadRibbonBar runat="server" RenderMode="Classic">
        <telerik:RibbonBarTab Text="home">
            <%-- duplicate the group and items inside to replicate more easily --%>
            <telerik:RibbonBarGroup Text="Documents">
                    <telerik:RibbonBarButton Text="Item 1" />

Last Updated: 02 Jul 2020 12:42 by ADMIN
Release R3 2020

Editor is not maintaining the Format of text, specifically the bullet numbers, when copied from MS word. 

You can use the attached content to reproduce the problem in the Overview demo of the control.

Last Updated: 25 Jun 2020 12:48 by ADMIN

This issue seems fixed for AzureAD while it is not for WSFederation authentication

It seems the final solution is to manually remove the entries with null/empty key from the submitted form

Last Updated: 25 Jun 2020 12:27 by ADMIN


<telerik:RadButton ID="RadButton1" runat="server" Text="Submit" EnableEmbeddedSkins="false" EnableEmbeddedBaseStylesheet="false"/>
<telerik:RadCheckBox ID="RadCheckBox1" runat="server" Text="CheckBox" Skin="Default" />


<telerik:RadButton ID="RadButton1" runat="server" Text="Submit" Skin=""/>


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