This sticky thread lists known issues and breaking changes introduced in the UI for ASP.NET AJAX releases.

• Q3 2011 (Version number: 2011.3.1115)
• Q1 2013 (Version number: 2013.1.220)
• Q2 2013 (Version number: 2013.2.611)
• Q2 2013 SP1 (Version number: 2013.2.717)
• Q3 2013 (Version number: 2013.3.1015)
• Q1 2014 (Version number: 2014.1.225)
• Q2 2014 (Version number: 2014.2.618)
• Q3 2014 (Version number: 2014.3.1024)
• Q1 2015 (Version number: 2015.1.225)
• Q2 2015 (Version number 2015.1.623)
  
• Q2 2015 SP1 (Version number: 2015.2.729)
• Q3 2015 SP1 (Version number: 2015.3.1111)
• Q1 2016 (Version number: 2016.1.113)
• Q1 2016 SP1 (Version number: 2016.1.225)
• R2 2016 (Version number: 2016.2.504)
• R2 2016 SP1 (Version number: 2016.2.607)
• R3 2016 (Version number: 2016.3.914)
• R3 2016 SP1 (Version number: 2016.3.1018) 
• R1 2017 (Version number: 2017.1.118)
• R1 2017 SP1 (Version number: 2017.1.228)
• R2 2017 (Version number: 2017.2.503)
• R2 2017 SP2 (Version number: 2017.2.711)
• R3 2017 (Version number: 2017.3.913)
• R1 2018 (Version number: 2018.1.117)
• R2 2018 (Version number: 2018.2.516)
• R2 2018 SP1 (Version number: 2018.2.710)
• R3 2018 (Version number 2018.3.910)
• R1 2019 (Version number: 2019.1.115)
• R3 2019 (Version number: 2019.3.916)
• R1 2020 (Version number: 2020.1.114)
• R3 2020 SP1 (Version number: 2020.3.1021)
• R1 2021 SP1 (Version number: 2021.1.224)
• R2 2021 (Version number: 2021.2.511)
• R2 2021 SP1 (Version number: 2021.2.616)
• R3 2021 (Version number: 2021.3.914)
• R3 2021 SP1 (Version number: 2021.3.1111)
• R2 2022 SP1 (Version number: 2022.2.622)
• R3 2022 (Version number: 2022.3.913)
• R1 2023 (Version number: 2023.1.314)
• 2024 Q1 (Version number: 2024.1.131)
• 2024 Q3 (Version number: 2024.3.805)
• 2024 Q4 (Version number: 2024.4.1113)
• 2024 Q4 (Version number: 2024.4.1114)
• 2025 Q1 (Version number: 2025.1.211)

---

Q3 2011 (Version number: 2011.3.1115)

Problem: When adding items to OData-enabled controls (RadMenu, RadTreeView, RadListBox, RadComboBox) through design time erroneous markup is applied to the control:

Please note the added ODataSettings section. It will cause JavaScript errors on the page.

Solution: Remove the ODataSetting section and the issue will vanish. The problem is also fixed in the Q3 SP1 release, version number 2011.3.1305

When I run my project I'm getting this error

Could not load file or assembly 'Telerik.Web.UI' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

In my web.config I checked that the version in the web.config is the same as the version I'm using in references

<assemblyIdentity name="Telerik.Web.UI" publicKeyToken="121fae78165ba3d4" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2020.2.617.45" newVersion="2020.2.617.45" />

 

Hi,

I'm following the setup for "RadMonthYearPicker" with the link below: 

https://demos.telerik.com/aspnet-ajax/monthyearpicker/overview/defaultcs.aspx

My need is to show only the current year (2025). In this case Year 2021-2024 and 2026-2030 should be hidden or removed from the popup.

Is there a property to do so? Or is there a workaround?

 

Thanks,

Bob

Hello,

I am trying to generate a solution for processing Word .DOCX documents, adding some headers and footer and then saving them as a PDF.  My original code used Aspose libraries to accomplish this.  Our current version is many years old and outside the update path, their recent releases seem to handle this, so I know Telerik handles some of the same functionality and was considering standardizing on Telerik and re-writing the code.

I created a real simple example as a test to just read in the .docx as a stream and then export as a PDF.  The PDF seems to be corrupted or fails with Cambodian, and if I load just a standard English, Spanish or similar document (without doing the header work, etc) it seems to save the PDF fine.

I did not know if there was additional statements I needed to get this to convert/save as a pdf because of the font family.  Thanks

 

            Telerik.Windows.Documents.Flow.Model.RadFlowDocument doc;

            var docxPRovider = new Telerik.Windows.Documents.Flow.FormatProviders.Docx.DocxFormatProvider();
            var pdfProvider = new Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider();
            TimeSpan timeoutInterval = TimeSpan.FromSeconds(180);

            using (FileStream stream = File.Open(@"C:\Telerik\15-190.docx", FileMode.Open))
            {
                doc = docxPRovider.Import(stream, timeoutInterval);
            }
        
            using (Stream output = File.Open(@"C:\Telerik\Out\15-190.pdf", FileMode.Create))
            {
                pdfProvider.Export(doc, output, timeoutInterval);
            }

Hi,

I'm using RadFileExplorer in a project that includes file version control. Occasionally, when attempting to save a new version of a file, I receive the alert:
"A file with a name same as the target already exists!"

This issue seems inconsistent — it doesn't appear limited to a specific file type, but I've noticed it more frequently with image files or files that have numbers in their names.

I came across a possible solution in this File Explorer as a Version Control issues. in UI for ASP.NET AJAX | Telerik Forums, where it was suggested to modify the GetFIle method to always return null. Here's the method :

public override Stream GetFile(string url)
{
    string virtualPath = RemoveProtocolNameAndServerName(url);
    string physicalPath = this.GetPhysicalFromVirtualPath(virtualPath);
    if (physicalPath == null)
        return null;

    if (!File.Exists(physicalPath))
    {
        return null;
    }

    return File.OpenRead(physicalPath);
}

if it is okay to overriding this method to always return null? Is it a safe and recommended approach to prevent the "file already exists" error in version control scenarios?

After updating to the latest version (2025.1.218), I received an error on only one of my pages where I'm using the asp:RequiredFieldValidator.

The error stated that WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'...

Initially, I added the script mapping to the global.asax.cs page, but then discovered I could just disable UnobtrusiveValidation in the web.config.

The error was resolved with each of these solutions, but I wanted to get away from modifying the global.asax page, so I went with the web.config setting.

My questions are what has changed that led to this error, and which method is recommended?  What are the ramifications of simply disabling it in the web.config?

 

We are facing below issue with latest  telerik control please provide help on it, its very urgent


Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=RadScriptManager1_TSM&compress=1&_TSM_CombinedScripts_=;;System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35:en-US:f319b152-218f-4c14-829d-050a68bb1a61:ea597d4b:b25378d2;Telerik.Web.UI, Version=2015.1.225.45, Culture=neutral, PublicKeyToken=121fae78165ba3d4:en-US:d3cd47d0-4d93-4bad-8b9f-f9fea0aa4c69:16e4e7cd:f7645509:24ee1bba:6d43f6d9:2003d0b8:f46195d3:c


below is our config settings




<?xml version="1.0"?>
<configuration>

<appSettings>

<add key="vs:EnableBrowserLink" value="false"/>
</appSettings>

<connectionStrings>

</connectionStrings>
<!--Start CM Config-->
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="BasicHttpBinding_IReleaseNotesService"/>
<!-- Remove if not using Healthwise Integration -->
<binding name="DrugInteractionsSoap" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="6553600" maxBufferPoolSize="524288" maxReceivedMessageSize="6553600" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
<readerQuotas maxDepth="32" maxStringContentLength="6553600" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384"/>
<security mode="Transport">
<transport clientCredentialType="None" proxyCredentialType="None" realm=""/>
<message clientCredentialType="UserName" algorithmSuite="Default"/>
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://help.Lumeris.com/Api/v1.0/ReleaseNotes.svc" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IReleaseNotesService" contract="Client.IReleaseNotesService" name="BasicHttpBinding_IReleaseNotesService"/>
<!-- Remove if not using Healthwise Integration -->
<endpoint address="http://dicapi.healthwise.net/DrugInteractions.asmx" binding="basicHttpBinding" bindingConfiguration="DrugInteractionsSoap" contract="HealthwiseService.DrugInteractionsSoap" name="DrugInteractionsSoap"/>
</client>
</system.serviceModel>
<!--End CM Config-->


<!--
For a description of web.config changes see http://go.microsoft.com/fwlink/?LinkId=235367.

The following attributes can be set on the <httpRuntime> tag.
<system.Web>
<httpRuntime targetFramework="4.5" />
</system.Web>
-->
<system.web>
<httpRuntime encoderType="System.Web.Security.AntiXss.AntiXssEncoder" requestValidationMode="2.0" executionTimeout="43200" maxRequestLength="1048576" maxQueryStringLength="9999"/>
<compilation debug="false" targetFramework="4.5.1">
<assemblies>
<add assembly="System.Security, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="System.Speech, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add assembly="System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<!--Devexpress-->
<add assembly="Ext.Net, Version=1.0.4093.32349, Culture=neutral, PublicKeyToken=2E12CE3D0176CD87"/>
<!--CM Config-->
<add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="Microsoft.VisualBasic, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
</assemblies>

</compilation>
<customErrors mode="Off"/>

<authorization>
<deny users="?"/>
</authorization>
<sessionState mode="StateServer" stateConnectionString="tcpip=127.0.0.1:42424" cookieless="false" timeout="240"/>

<pages autoEventWireup="true" enableSessionState="true" enableViewState="true" enableViewStateMac="true" maxPageStateFieldLength="1000" validateRequest="true" controlRenderingCompatibilityVersion="3.5">
<controls>

<add tagPrefix="telerik" namespace="Telerik.Charting" assembly="Telerik.Web.UI"/>
<add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI"/>

<!--End CM Config-->
</controls>
</pages>
<httpHandlers>
<clear/>

<add verb="*" path="Telerik.Web.UI.DialogHandler.aspx" type="Telerik.Web.UI.DialogHandler, Telerik.Web.UI"/>
<add verb="*" path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler,Telerik.Web.UI" validate="false"/>
<add path="Telerik.RadUploadProgressHandler.ashx" type="Telerik.Web.UI.RadUploadProgressHandler" verb="*" validate="false"/>
<add path="Telerik.Web.UI.WebResource.axd" verb="*" type="Telerik.Web.UI.WebResource, Telerik.Web.UI" validate="false"/>
<add path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI" validate="false"/>

</httpHandlers>
<httpModules>
<add name="RadUploadModule" type="Telerik.Web.UI.RadUploadHttpModule"/>

</httpModules>

<identity impersonate="false"/>
</system.web>

<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="52428800" maxQueryString="9999"/>
</requestFiltering>
</security>
<validation validateIntegratedModeConfiguration="false"/>
<modules>
<add name="RadUploadModule" preCondition="integratedMode" type="Telerik.Web.UI.RadUploadHttpModule"/>
</modules>
<handlers>
<remove name="WebServiceHandlerFactory-Integrated"/>
<remove name="ScriptHandlerFactory"/>
<remove name="ScriptHandlerFactoryAppServices"/>
<remove name="ScriptResource"/>

<add name="ChartImage.axd_*" path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI, Culture=neutral, PublicKeyToken=121fae78165ba3d4" preCondition="integratedMode"/>
<add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91"/>


<!--Start CM Config-->
<add name="TelerikWebResource" verb="*" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource, Telerik.Web.UI" preCondition="integratedMode"/>
<add name="TelerikWebDialogHandler" path="Telerik.Web.UI.DialogHandler.aspx" verb="*" type="Telerik.Web.UI.DialogHandler, Telerik.Web.UI" preCondition="integratedMode"/>
<add name="TelerikChartHandler" path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI"/>
<add name="TelerikSpellCheckHandler" path="Telerik.Web.UI.SpellCheckHandler.axd" verb="*" type="Telerik.Web.UI.SpellCheckHandler,Telerik.Web.UI"/>
<add name="Telerik_RadUploadProgressHandler_ashx" verb="*" preCondition="integratedMode" path="Telerik.RadUploadProgressHandler.ashx" type="Telerik.Web.UI.RadUploadProgressHandler"/>
<!--End CM Config-->

</handlers>
<defaultDocument>
<files>
<add value="login.aspx"/>
</files>
</defaultDocument>
<httpProtocol>
<customHeaders>
<clear/>
<add name="X-UA-Compatible" value="IE=EmulateIE8"/>
</customHeaders>
</httpProtocol>
</system.webServer>
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="4.0.0.0"/>
</dependentAssembly>
<dependentAssembly>
<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="4.0.0.0"/>
</dependentAssembly>
</assemblyBinding>
</runtime>
</configuration>

Good afternoon,

I'm currently running Telerik UI for ASP.NET AJAX R3 2023.  I am using the RadAsyncUpload with a AsyncHandler.ashx to copy the file to a RadUploadTemp on a file share.

This has been working perfectly for ages but recently large file updates have been failing e.g. a 2.1 GB file failing at 61%.  I'm being told this is due to a TCP Zero Window issue.

I assumed the chunked upload mechanism mitigates the issues caused by TCP window size restrictions, which can cause slowdowns or failures when uploading very large files in a single request. I am setting the upload ChunkSize value to 4194304.

I have the following settings in web.config:

Have you got any ideas as to why it might be failing for larger files, or what I can do to the configuration to prevent the TCP Zero Window error by pausing data transmission until the receiver is ready to accept more data?

Kind regards,

Richard

Hi, I am using Telerik RadEditor, and some of the localization text is missing for the table style builder window. I have followed this post, and some localizations are still missing. Can you share the latest localization files for the en-US culture here?

I have attached the screenshot of the issue.

Hello,

I have a RadGrid embedded in a RadTabStrip. This is defined in a UserControl with a RadAjaxManagerProxy. It displays content from a DB server. I have a GridButtonColumn that is defined below. Everything works fine except that when I try to delete a row by clicking on the icon it won't work initially. A second click results in a callback to the server's RgAttachments_ItemCommand appropriately. This behaviour happens consistently. I took a look at the generated code and noticed a difference in the button's clientside onclick handler

 

This following generated javascript works

if(!$find('ctl00_MainContent_ctlRqstAttachments_RgAttachmentRevision').confirm('Are you sure you wish to delete this file attachment?', event, 'ctl00_MainContent_ctlRqstAttachments_RgAttachmentRevision', 'Delete'))return false;__doPostBack('ctl00$MainContent$ctlRqstAttachments$RgAttachmentRevision$ctl00$ctl14$ctl00','')

This generated code doesn't

if(!$find('ctl00_MainContent_ctlRqstAttachments_RgAttachmentRevision').confirm('Are you sure you wish to delete this file attachment?', event, 'ctl00_MainContent_ctlRqstAttachments_RgAttachmentRevision', 'Delete'))return false;__doPostBack('ctl00$MainContent$ctlRqstAttachments$RgAttachmentRevision$ctl00$ctl12$ctl01','')

 

The column in question

                            <telerik:GridButtonColumn HeaderText="Delete" ConfirmText="Are you sure you wish to delete this file attachment?" ConfirmDialogType="RadWindow" ButtonCssClass="btn btn-outline-danger btn-sm rounded" ConfirmTitle="Delete" ButtonType="FontIconButton" CommandName="Delete" Text="Delete" UniqueName="DeleteColumn" ItemStyle-ForeColor="Red">
                                <ItemStyle HorizontalAlign="Center"></ItemStyle>
                            </telerik:GridButtonColumn>

 

Any help to resolve this is greatly appreciated