Steps to reproduce:

Since the last update, we receive often the following exception from our users log. I don't know exactly how to reproduce, but I know that when it happens, the user tries to click anywhere in the document and each time the exception is thrown. The users need to close and reopen the document to make it work again.

System.NullReferenceException: Object reference not set to an instance of an object. at Telerik.Windows.Documents.UI.DocumentPresenterBase.CaretPosition_PositionChanged(Object sender, EventArgs e) at Telerik.Windows.Documents.DocumentPosition.MoveToPosition(DocumentPosition newPosition) at Telerik.Windows.Documents.Selection.MouseSelectionHandler.UpdateSelectionAndCaretPosition() at Telerik.Windows.Documents.Selection.MouseSelectionHandler.RegisterDocumentMouseMove(Point position, SourceType source) at Telerik.Windows.Documents.UI.DocumentPresenterBase.HandleMouseMoveOnPosition(Point position, SourceType source) at Telerik.Windows.Documents.UI.DocumentPresenterBase.Owner_MouseMove(Object sender, MouseEventArgs e) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Input.MouseDevice.Synchronize() at System.Windows.Input.MouseDevice.PostProcessInput(Object sender, ProcessInputEventArgs e) at System.Windows.Input.InputManager.ProcessStagingArea() at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel) at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

We also had this case when we try programatically to move the caret (seems to be the same end result exception):

System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.Windows.Documents.UI.DocumentPresenterBase.CaretPosition_PositionChanged(Object sender, EventArgs e)
   at Telerik.Windows.Documents.DocumentPosition.MoveToDocumentStart()
   at Telerik.Windows.Documents.DocumentPosition.MoveToFirstPositionInDocument()

Can we have a floating Label on a RadComboBox and a RadMultiColumnComboBox, same as a WatermarkTextBox?

It is quite annoying to have on a same form a WatermarkTextBox and Combo boxes as they appearance are so different.

Hi Team,

I have set up SSO and it's great so far. I have a feature request that would make it even better, and solve many large enterprise needs, is to have a way to integrate SCIM based license provisioning as well.

Right now, you still do need to manage licensed users on the Manage Licensed Users portal. A License Holder or License Manager needs to add a Developer to the account and assign them a license.

With SCIM integration, we could better manage the users and licensing on a larger scale, with automation and oversight on the enterprise-managed SSO identity.

Thank you,

Kevin

Windows 11

VS 2022

UI for WPF (2024 Q4)

.NET 8

Binaries.NoXaml\WPF80\Telerik.Windows.Controls.RichTextBox.dll (2024.4.1213.80)

I can create a docx file with Word that results in a null reference exception at

Since this exception is in a threadpool that is doing layout, the exception cannot be caught and is not recoverable.

It is easy to reproduce (see attached file). First create a Word doc with a large image that is anchored. Then add a bookmark. Removing either the bookmark or the "square" text wrapping removes the exception.

The code to load the document and display it is very simple:

   private string? LoadDocx(
      string path)
   {
      string? msg = null;
      try
      {
         using var instream = File.OpenRead(path);

         var openXmlRadDocProvider =
            new Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider();

         var raddoc = openXmlRadDocProvider.Import(instream);
         RadRtb.Document = raddoc;
      }
      catch (Exception ex)
      {
         msg = ex.Message;
      }

      return msg;
   }

"RadRtb" is a "RadRichTextBox". This method returns fine. The exception happens later in a non-UI threadpool thread.

While I don't expect the component to correctly render EVERY Word document, I do expect it to not exception on a valid document. There must be a better way to handle this.

Dear Support-Team,

We have an issue with a translation on the spreadsheet print preview.

It shows there in the dropdown for the scaling several Netherland translations on a German system.

The text should be like:

1. Blatt für eine Seite anpassen
Den Ausdruck verkleinern, damit er auf eine Seite passt.

2. Alle Spalten passen auf eine Seite
Den Ausdruck verkleinern, so dass er eine Seite breit ist.

3. Alle Zeilen in eine Seite einpassen
Den Ausdruck verkleiner, so dass alle Zeilen auf eine Seite passen

Could there be a fix for this issue?

Kind regards,

Anna

The dialog and the watermark stating that no license is found are displayed, even when the license key is installed properly. This happens in addin projects, like Excel VSTO Add-in.

To workaround this use the  TelerikLicensing.Register method to install your license script key.

public MyWpfUserControl()
{
    TelerikLicensing.Register("your-script-key");
    InitializeComponent();
}

Currently SvgImage does not support the following inner animation:

Are there any plans to release a Visual Studio 2022 theme for WPF?  The Winforms UI has this theme, and I would like to have it for WPF as well.

Are there other themes on the roadmap that you could share?

Thanks!

--Darren

** Fixed with Telerik.Licensing 1.4.16 **

The build performance with new license validation (2025) is very poor. 2025 version takes about 5 sec. extra time to build. For small projects it takes 10x longer.

Test environment:

1. Default WPF project created from template.
2. Only one change: Nuget Reference in .csproj
3. .NET 8
4. Visual Studio 17.13.

Build times depending on the Version of Telerik Nuget:

<PackageReference Include="Telerik.Windows.Controls.Navigation.for.Wpf" Version="2025.1.211" />

11:25:47:071    Build started at 11:25...
11:25:47:189    1>------ Build started: Project: TelerikBuildTest, Configuration: Debug Any CPU ------
11:25:51:748    1>[Telerik and Kendo UI Licensing]
11:25:51:748    1>      Telerik and Kendo UI License Key found at: C:\Users\...\AppData\Roaming\Telerik\telerik-license.txt (UserDirectory)
11:25:51:748    1>      License issued at 2025-03-16 to e**********@....
11:25:51:748    1>[Telerik and Kendo UI Licensing]
11:25:51:748    1>      Valid Telerik UI for WPF license found.
11:25:52:743    1>[Telerik and Kendo UI Licensing]
11:25:52:743    1>      Telerik and Kendo UI License Key found at: C:\Users\...\AppData\Roaming\Telerik\telerik-license.txt (UserDirectory)
11:25:52:743    1>      License issued at 2025-03-16 to e**********@...
11:25:52:743    1>[Telerik and Kendo UI Licensing]
11:25:52:743    1>      Valid Telerik UI for WPF license found.
11:25:52:815    1>TelerikBuildTest -> C:\Users\....\source\repos\TelerikBuildTest\TelerikBuildTest\bin\Debug\net8.0-windows\TelerikBuildTest.dll
11:25:52:828    ========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
11:25:52:828    ========== Build completed at 11:25 and took 05,892 seconds ==========

<PackageReference Include="Telerik.Windows.Controls.Navigation.for.Wpf" Version="2024.4.1213" />

11:26:33:405    Build started at 11:26...
11:26:33:581    1>------ Build started: Project: TelerikBuildTest, Configuration: Debug Any CPU ------
11:26:33:953    1>TelerikBuildTest -> C:\Users\...\source\repos\TelerikBuildTest\TelerikBuildTest\bin\Debug\net8.0-windows\TelerikBuildTest.dll
11:26:33:960    ========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
11:26:33:960    ========== Build completed at 11:26 and took 00,633 seconds ==========

A compilation error occurs in a project that doesn't use any Telerik code, but it references a class library which installs the Telerik.Licensing NuGet package. 

The error message from the class library project is the following:

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Microsoft.WinFx.targets(268,9): error MC1000: Unknown build error, 'Cannot resolve dependency to assembly 'Telerik.Licensing.Runtime, Version=1.4.6.0, Culture=neutral, PublicKeyToken=keyhere' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event.'

To workaround this, you can add assembly references to the Telerik dlls in the main project (including Telerik.Licensing.Runtime), instead of using NuGet packages.

Alternatively, you can install the Telerik.Licensing NuGet package also in the class library.

<ItemGroup>
	<PackageReference Include="Telerik.Licensing" Version="1.4.*" />
</ItemGroup>

Note that with this approach you will see a message in the output that no license is installed, even if you have one. However, for now (versions from 1.4.6 to 1.4.12, which is the latest at the moment of writting this post), the error won't apply any compile or runtime restrictions on the UI or the functionality.

We are using the RadRichTextbox limiting the width size and configured to wrap the text, automatically increasing its height as needed. While this functionality works correctly for most text, it fails in cases where a line ends with spaces. These trailing spaces extend beyond the control's visible boundaries, making them invisible on-screen, yet they remain present in the RadDocument.

To reproduce: Create a RadRichTextbox with limited width and auto adjusted height. Type in underlined text on first line and add a lot of spaces that go behind the visible width. Type in more text to see the visible underlined text go to the next line (while hiding the added underlined spaces of the previous line). Exporting to RadDocument shows the extra underlined spaces that RadRichTextbox does not.

Hello together,

I am experiencing a bug with the following use case:

1. Import an existing PDF file
2. Modify the PDF file
3. Export the PDF file

When upgrading Telerik.Documents.Fixed from version 2024.3.806 to version 2024.4.1106 the exported PDF file is missing different parts of the originally imported PDF file or even results in a complete "messy" file. Input and output files are view with Adobe Acrobat, Google Chrome, Edge...all showing the same result.

Even omitting step 2 (i.e. I only import and directly export the PDF file) results in the same bug after.

I do not use any special import or export setting to reproduce the error. But even with applying different import/export settings I could not change the buggy outcome.

var bytes = File.ReadAllBytes(@"C:\temp\in.pdf");
var formatProvider = new PdfFormatProvider();
var document = formatProvider.Import(bytes, TimeSpan.FromSeconds(20));
var outBytes = formatProvider.Export(document, TimeSpan.FromSeconds(20));
File.WriteAllBytes(@"C:\temp\out.pdf", outBytes);

See the attached file for example, import it and export it (via code snippet above).

With version 2024.3.806 everything works fine - and as I am not seeing any relevant breaking changes or other release information regarding this issue, I am a little bit lost with what I could do to solve the issue..

Thanks for your support!

Fixed in Telerik.Licensing NuGet package version 1.4.10. Install this (or later) version of the package to avoid the issue.

Build errors may occur in situation where you have two projects one depending on the other, and the main project installs the Telerik.Licensing nuget package. The package triggers a set of MSBuild taks and at some point an IncrementalClean is invoked, which deletes some of the files and errors occur during the build.

The error message that can occur:

CSC : error CS0006: Metadata file 'dll/file/path/here.dll' could not be found [project directory path here]