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)
• 2025 Q2 (Version number: 2025.2.520)

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:

<telerik:RadListBox runat="server" ID="RadListBox1">
    <Items>
    </Items>
    <WebServiceSettings>
        <ODataSettings InitialContainerName="">
        </ODataSettings>
    </WebServiceSettings>
</telerik:RadListBox>

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

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,

We have been using the LoadSettings() and SaveSettings() functions to persist the expression in a database. 

We discovered that you have changed the internal format of this when we upgraded to Telerik UI for ASP.NET AJAX 2024 Q4 from Telerik UI for ASP.NET AJAX R1 2023. The old version used ViewState and the new one uses Json. The result of this is that the old expressions are not working anymore. This is a blocker for us. Do you have any solution to detect/convert the old persisted expressions in the new version? We have many expressions saved in the old format and it breaks the application.  

The main reason for upgrading is that we are using your PDF document library to detect if files contains javascript actions and you introduced support for this after the 2023 version. We are checking files for Javascript in compination with your RadAsyncUplad since we do not want users to upload PDF files with javascript due to security reasons. It would have been nice to have access to the Javascript collection that are private. We had to use reflection to get to it. The reason for this is that the javascript is connected to OnOpen action. That one is not supported by public access.

Regards

Ole Oscar

I'm encountering an issue in an ASP.NET WebForms application using RadGrid, and I’ve isolated it to one specific column. The grid is configured to use EnableHeaderContextMenu="true". In all columns except one, clicking the ellipsis icon properly displays the context menu just above the column header. However, in the affected column, the context menu opens at the top-left corner of the page (left: 75px; top: 20px;), regardless of scroll position or grid placement.

Details:

• Right-clicking on the column header does show the menu in the correct location.

• The issue is limited to a single column; the others function as expected.

• This behavior is consistent across Chrome and Edge (latest versions).

• Telerik AJAX controls are up to date (or close — please let me know if this was resolved in a recent release).

• Attached is a side-by-side comparison, showing the missing Filter icon and Search text box, and inconsistent alignment.

Analysis So Far:

1. Data Content Difference:

   • The affected column contains only NULLs or one repeated value (homogeneous data).

   • I suspect this may result in layout optimizations or missing render elements on Telerik’s end.

2. HTML Inspection shows a difference:

   • In the affected column, this element is hidden:

   <span id="ctl00_Main_RadGrid1_rghcMenu_i9_filterCheckListSearch_wrapper"
         class="RadInput RadInput_Sunset"
         style="display: none;">

   
   

   • In the working column, the same element has no display: none; style:

   <span id="ctl00_Main_RadGrid1_rghcMenu_i9_filterCheckListSearch_wrapper"
         class="RadInput RadInput_Sunset"
         style="">

   3. Menu Container Differences:

• Broken menu:

<div class="RadMenu RadMenu_Sunset ... GridContextMenu"
     style="left: 75px; top: 20px; height: 324px;">

• Working menu:

<div class="RadMenu RadMenu_Sunset ... GridContextMenu"
     style="left: 366px; top: 180px; height: 667px;">

• The significantly reduced height suggests missing or hidden menu elements.

Questions:

• Is this a known issue tied to RadGrid's menu rendering when the filter controls (like checklist search) are hidden or omitted?

• Could recent browser updates (Chrome/Edge) impact menu positioning logic in RadGrid?

• Is there a client-side fallback when no visible anchor element is found for positioning?

• Can this behavior be overridden or corrected without writing custom JS or modifying grid data?

What I’m Avoiding for Now:

I’m intentionally avoiding workarounds like injecting dummy values, overriding client-side menu positioning logic, or forcing the checklist visibility. I’m first trying to confirm if this is a recognized bug, regression, or browser compatibility issue.

I can provide a minimal repro project if needed.

Thanks in advance!

Hello,

In the demo (https://demos.telerik.com/aspnet-ajax/editor/examples/trackchanges/defaultcs.aspx):

1. When I click the B/I/U buttons, the editor logs multiple Reformat actions and repeatedly applies the B/I/U tags. How can I prevent this?

2. Is there a way to disable Reformat actions in Track Changes mode? I only need to track insertions (ins) and deletions (del).

Thank you!

I essentially would like users to paste in their data to a RadSpreadsheet and then click a button. Once Clicked I can process the data and save the data to a database.  However, I would also like to manipulate the spreadsheet and rename the columns from ABC to a heading I choose.

Can you point me on how to change the column headings?

Can you point me into how to process the pasted data into a datatable or object when a button is clicked on the page?

Thanks!

Hi

Im using Visual Studio 2022 and c#

I have a telerik RadGrid within my apsx page and I have set editMode="batch"

One of the columns SOStatus is a raddropdownList, with set items. When I select from the dropdown list and click on saveChanges within BatchEditCommand the SOStatus is blank, even though I have selected something. Not sure why?

Here is my ASPX

<telerik:GridTemplateColumn UniqueName="SOStatus" DataField="SOStatus" HeaderText="SO Status">
                                        <HeaderStyle Width="80px" />
                                        <ItemStyle Width="80px" />
                                        <ItemTemplate>
                                            <%# Eval("SOStatus") %>
                                        </ItemTemplate>
                                        <EditItemTemplate>
                                            <telerik:RadDropDownList ID="rdSOStatus" runat="server"  DataValueField="SOStatus" DataTextField="SOStatus" Width="110%">
                                                 <Items>
                                                        <telerik:DropDownListItem Text="" />
                                                        <telerik:DropDownListItem Text="Sale" />
                                                        <telerik:DropDownListItem Text="Pull Forward" />
                                                        <telerik:DropDownListItem Text="Risk" />
                                                        <telerik:DropDownListItem Text="Drop for this week" />
                                                        <telerik:DropDownListItem Text="Drop" />
                                                    </Items>

                                            </telerik:RadDropDownList>
                                        </EditItemTemplate>
                                    </telerik:GridTemplateColumn>

and here is the BatchEditCommand c# code

protected void rg_SalesPlan_BatchEditCommand(object sender, GridBatchEditingEventArgs e)
        {

            var batchEditingCommands = (List<GridBatchEditingCommand>)e.Commands;

       
            foreach (GridBatchEditingCommand batchCommand in batchEditingCommands)
            {
                Hashtable oldValues = batchCommand.OldValues;
     
                Hashtable newValues = batchCommand.NewValues;
         

             
                string SOStatus = newValues["SOStatus"].ToString();
               
                string OrigSOStatus = oldValues["SOStatus"].ToString();
               

}

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:

  <system.web>    
    <httpRuntime maxRequestLength="2097151" executionTimeout="18000"/>
  </system.web>

  <system.webServer>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="4294967295"/>
      </requestFiltering>
    </security>
  </system.webServer>

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

1. If there is any workaround we can implement using the current RadMenu to meet this requirement?
2. Whether there is an estimated timeline for when the RadMenu will support WCAG 2.2 natively?