Contact email: carlos.diaz@cenace.gob.mx
Dear Telerik Support. I found another bug related to this one below.
This line of code also causes the same issue.
$find("txtYear").clear();
See attached Console debug output.
It is my opinion that a hot fix needs to be done asap! The work around that Derek posted on May 23rd falls short of the bigger issue. This is a serious matter and needs to be addressed immediately.
Summary
After editing an Excel `.xlsx` file using Telerik RadSpreadsheet and saving it via the default Save option, the saved file becomes corrupted. It no longer opens in RadSpreadsheet (throws an error) and shows a repair warning in Microsoft Excel.
Reproduction Steps
1. Upload an Excel `.xlsx` file to the `ABC` folder on the server.
2. Load the file in RadSpreadsheet via a basic viewer page.
3. Make any small edit (e.g., change a cell’s value).
4. Click the built-in Save option in the RadSpreadsheet toolbar.
5. Attempt to:
- Reopen the saved file in RadSpreadsheet → Error: Object reference not set to an instance of an object.
- Open in Excel → Warning: “We found a problem with some content in ‘filename’. Do you want us to try to recover as much as we can?”
Files Attached
- `Original.xlsx` — Before editing, opens fine in both RadSpreadsheet and Excel.
- `Modified.xlsx` — After saving via RadSpreadsheet, causes errors.
- Screenshot of:
- RadSpreadsheet error :
- Excel repair prompt
Code Snippet :
<telerik:RadSpreadsheet ID="sample" runat="server" Visible="false" style="font-size: 10px;" />
protected void Page_Load(object sender, EventArgs e)
{
string fileName = (string)Session["SelectedFileName"];
SheetLoad(fileName);
}
private void SheetLoad(string fileName)
{
try
{
string filePath = Server.MapPath("~/ABC/" + fileName);
if (!File.Exists(filePath))
{
string errorMsg = "File not found: " + filePath;
ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('File not found!');", true);
return;
}
// Load spreadsheet using Telerik document provider
sample.Provider = new SpreadsheetDocumentProvider(filePath);
sample.Visible = true;
}
catch (Exception ex)
{
string errorMsg = "Error opening file: " + ex.Message + " | File: " + fileName;
ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Error loading file!');", true);
}
}
**Observation:**
* This only happens for **some files**, especially ones that likely contain advanced Excel features.
* Other simpler files save and reload without any issue.
**Assumption:**
It seems the default save behavior of RadSpreadsheet is **not preserving some Excel structures**, leading to file corruption on save.
Hello -
I just updated my components to 2025.1.218, and am receiving the following ADA Compliance issues on a page scan. This is to conform to WCAG 2.1 AA. The component is the Ajax telerik:RadComboBox:
Buttons must have discernible text
<button class="rcbActionButton" tabindex="-1" type="button">select</button>
Form elements must have labels
<input name="ctl00$MainContent$ComboBox$NewCombo" type="text" class="rcbInput radPreventDecorate rcbEmptyMessage" id="ctl00_MainContent_ComboBox_NewCombo_Input" value="Search..." autocomplete="off"></input>
Component in .ascx file:
EmptyMessage="Search..."
AllowCustomText="true"
MarkFirstMatch="true"
Skin="Bootstrap"
AutoPostBack="true"
SelectMethod="GetInfo"
DataValueField="Id"
DataTextField="Name"
OnSelectedIndexChanged="ComboBox_SelectedIndexChanged"
MaxHeight="250px" aria-labelledby="InfoLabel" />
Please advise. Thanks!
Upgrading Telerik UI for ASP.NET AJAX to version 2025 Q1 (2025.1.211) throw a JavaScript error:
- Uncaught TypeError: Cannot read properties of undefined (reading 'parentElement')
Steps to reproduce: Have a RadWindow with NavigateUrl set to a different page:
<telerik:RadWindow ID="RadWindow1" runat="server" RenderMode="Classic" VisibleOnPageLoad="true" NavigateUrl="Default.aspx">
</telerik:RadWindow>
When pasting bullet lists from Microsoft Word into the editor, extra leading spaces ( ) appear in the list items. This causes unexpected indentation and formatting issues.
Before 2025 Q1
In 2025 Q1
Hello
I have an ASP.NET Ajax Telerik Solution (site) that has a web site project and a library project. The solution was developed almost 8 years ago and so far I've been able to upgrade telerik controls several times without any problem. Now, when I tried to upgrade the Telerik controls using the Upgrade Wizard Project only shows the class library as you can see in the attached picture.
To replicate this beahavior:
1. Create a new Telerik VB Webform Site
2. Add a Class Library Net Framework project to the solution.
3. Add a reference to Telerik.Web.UI to the Class Library project (optional).
4. Save and close solution.
5. Reopen it and run the Telerik Upgrade Wizard Project.
It only shows the Class Library project ...
Test Environment:
OS: Windows_11
- Open URL: https://demos.telerik.com/aspnet-ajax/grid/examples/overview/defaultcs.aspx page in Edge Browser.
- TAB to the grid container.
- Observe the issue that the grid container is receiving focus.
Actual Behavior:
Focus moves on non-interactive controls.
Expected Behavior:
Focus shouldn't go to the non-interactive element in table content.
TEST ENVIRONMENT
OS: Windows_11Screen Reader: NVDA (2021.3)
REPRO STEPS:
1. Open URL Telerik Web UI Grid Overview Demo | Telerik UI for ASP.NET AJAX page in edge browser and turn on NVDA.
2. Navigate to next/previous controls in browse mode on the over view page.
3. Observe the issue.
ACTUAL RESULTS:
In browse mode, name property is not announced by the screen reader for next/previous buttons.
EXPECTED RESULT:
In browse mode, Screen reader should announce a name p:roperty 'First, Next, Previous and Last page' for the controls.
Pasting plain text content from notepad or other text editor into the RadEditor control (design view) results in container HTML tags adding to the content and inline styles that make the text unreadable.
Content pasted:
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut placerat orci nulla pellentesque dignissim enim sit. Diam quam nulla porttitor massa id neque. Ipsum suspendisse ultrices gravida dictum fusce ut. Sed odio morbi quis commodo odio aenean. Sed faucibus turpis in eu mi bibendum neque egestas congue. Sed pulvinar proin gravida hendrerit. Cras semper auctor neque vitae tempus. Nisi porta lorem mollis aliquam ut porttitor leo a diam. Quis vel eros donec ac odio tempor. Tellus in metus vulputate eu scelerisque felis imperdiet proin. Et ligula ullamcorper malesuada proin libero nunc consequat interdum. Neque viverra justo nec ultrices.
Result in RadEditor:
<div class="telerik_paste_container" style="border-width: 0px; position: absolute; overflow: hidden; margin: 0px; padding: 0px;">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut placerat orci nulla pellentesque dignissim enim sit. Diam quam nulla porttitor massa id neque. Ipsum suspendisse ultrices gravida dictum fusce ut. Sed odio morbi quis commodo odio aenean. Sed faucibus turpis in eu mi bibendum neque egestas congue. Sed pulvinar proin gravida hendrerit. Cras semper auctor neque vitae tempus. Nisi porta lorem mollis aliquam ut porttitor leo a diam. Quis vel eros donec ac odio tempor. Tellus in metus vulputate eu scelerisque felis imperdiet proin. Et ligula ullamcorper malesuada proin libero nunc consequat interdum. Neque viverra justo nec ultrices.</div>
See accompanying screenshots.
When the grid has a horizontal scroll bar displayed, we can't scroll the table horizontally using keyboard only. If testing using the Siteimprove Accessibility Checker, we will get the issue "Scrollable element is not keyboard accessible".
The reason is that when the RadGrid is rendered, the horizontal scroll bar is render as a separate <div> out of the data table, and the horizontal scroll bar doesn’t have a tabindex, so there’s no way to put focus on it using keyboard. Can you add tabindex="0" to the horizontal scroll bar?
When assigning multiple resources and percentages, the first item in list always goes back to 100%.
It saves back to UI correctly but as soon as you leave or refresh page it goes back to 100% on first item and that's what's saved in database.
The online demo has the same code but demo doesn't save at all to test.
See attached screen shots.