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UI for ASP.NET AJAX Forum
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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)

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.

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
Vasko
Telerik team
 updated answer on 29 May 2025
1 answer
752 views

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" />

 

Vessy
Telerik team
 answered on 22 Oct 2021
0 answers
2 views

Hi, I am facing the following issues with the Telerik table. Can you please help resolve them?

1. The text is not aligned with the dropdown (Image attached)


2. When we edit the widget > click on the table on a random cell > select Table Properties > The table wizard will always default to the top left cell > This is working as expected.
If you click in the table (not the editor) and select Cell Properties > the wizard will display (highlight) the cell you selected in the table is it expected that when selecting table properties it always default to the left side first box but when selecting cell properties it will show the current cell which we are in.

video link:- https://jam.dev/c/c1cdf56c-53ab-4218-8774-65907b3efd6d


3. Table properties > Select cells (e.g the top three) > Border > Select the bottom > 6 PX > Purple > OK > The preview is not showing the changes we want to apply > the preview is showing only the top left cell

video link:- https://jam.dev/c/88c17904-c758-47ab-949c-d29b4775dc6d

4. Following step 3 > when we navigate the mouse up and down, in the background, we can see only the top left cell with the border we configured. (while initially we selected the top three) > But if now, in the preview page, we will choose the top three > OK >We will see the top three cells showing the design we configured. 

video link:- https://jam.dev/c/ba52bff1-7459-44d6-a647-d3eb5cea07f3

5. From the widget/page > select the middle bottom cell (notice it has no styling) > Table properties > Cell Properties > Select the middle bottom cell again > More Cell Styling > Border > Notice that the top row design is inherited > Is this expected? 

 video link:- https://jam.dev/c/1516e16f-1f7c-4e89-8b19-368edabf5703

5.1 I have observed that when we're in the widget > selecting a cell from the table > clicking on Cell Properties > The top row design is not inherited. 

 

 

 

Atul
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Iron
 asked on 15 Jul 2025
1 answer
8 views

Hello,

 

Please check the following:

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

Set cursor after last word "browsers.". Then click Shift+Enter (break) one or several times. Then click BackSpace. 

BackSpace will remove last dot, but not a breaks.

 

How can I fix it?

Rumen
Telerik team
 answered on 15 Jul 2025
0 answers
2 views

Hi, I am facing the following issues with the Telerik table. Can you please help resolve them?

1. The text is not aligned with the dropdown (Image attached)


2. When we edit the widget > click on the table on a random cell > select Table Properties > The table wizard will always default to the top left cell > This is working as expected.
If you click in the table (not the editor) and select Cell Properties > the wizard will display (highlight) the cell you selected in the table is it expected that when selecting table properties it always default to the left side first box but when selecting cell properties it will show the current cell which we are in.

video link:- 
https://jam.dev/c/c1cdf56c-53ab-4218-8774-65907b3efd6d


3. Table properties > Select cells (e.g the top three) > Border > Select the bottom > 6 PX > Purple > OK > The preview is not showing the changes we want to apply > the preview is showing only the top left cell

video link:- https://jam.dev/c/88c17904-c758-47ab-949c-d29b4775dc6d

4. Following step 3 > when we navigate the mouse up and down, in the background, we can see only the top left cell with the border we configured. (while initially we selected the top three) > But if now, in the preview page, we will choose the top three > OK >We will see the top three cells showing the design we configured. 

video link:- 
https://jam.dev/c/ba52bff1-7459-44d6-a647-d3eb5cea07f3

5. From the widget/page > select the middle bottom cell (notice it has no styling) > Table properties > Cell Properties > Select the middle bottom cell again > More Cell Styling > Border > Notice that the top row design is inherited > Is this expected? 

 video link:- https://jam.dev/c/1516e16f-1f7c-4e89-8b19-368edabf5703

5.1 I have observed that when we're in the widget > selecting a cell from the table > clicking on Cell Properties > The top row design is not inherited. 

 

 

 

Atul
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Iron
 asked on 15 Jul 2025
1 answer
11 views

Drag and drop on the AsyncUpload control from file explorer or MS outlook works fine when I'm using Microsoft Edge. No issues.

My application is running under IE Mode (IE11 compatability) and in this case, drag and drop only works when dragging from the file explorer. When trying to drag from IE, the file or email does not get uploaded.

Is there anything that can be changed to make this work?

Vasko
Telerik team
 answered on 11 Jul 2025
1 answer
8 views

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!

Vasko
Telerik team
 answered on 07 Jul 2025
1 answer
12 views

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!

Vasko
Telerik team
 answered on 07 Jul 2025
1 answer
12 views

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

 

Attila Antal
Telerik team
 answered on 04 Jul 2025
1 answer
6 views

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!

 

 

 

Rumen
Telerik team
 answered on 03 Jul 2025
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