Declined: This task is obsolete following the introduction of the current Licensing Mechanism.
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Currently EULA requires Telerik assemblies to be protected against unauthorized redistribution, by following specific guidelines for the different types of technology:
- for WPF: https://docs.telerik.com/devtools/wpf/installation-and-deployment/deploying-telerik-ui/protecting-telerik-assembly
- for ASP.NET AJAX: https://docs.telerik.com/devtools/aspnet-ajax/deployment/protecting-the-telerik-asp.net-ajax-assembly
- for WinForms: https://docs.telerik.com/devtools/winforms/installation-deployment-and-distribution/redistributing-telerik-ui-for-winforms

When the guidelines for WinForms or AJAX are followed (namely the call to ValidatePassPhrase() is uncommented in AssemblyProtection.IsValid() method, the following license message is added to the generated documents:
"This document was generated by a copy of Telerik Document Processing licensed for use only by '<MyApp>'."Workaround: Set the application name as resource in the Application.Current, using the following code:

new System.Windows.Application();
System.Windows.Application.Current.Resources.Add("Telerik.Windows.Controls.Key", "MyApp");

where 'MyApp' should be replaced with the actual application name. References to PresentationFramework and WindowsBase .NET Framework assemblies should be added in order for this approach to work.

We use the PDF viewer in an WPF project and see sometimes faulty pdfs in the telerik viewer. If I open the pdf file in acrobat it lloks fine. Do you know this problem ?

Attached you find the original file and a screenshot from PDF viewer. Other files are shown correct in the telerik viewer.

Workaround: this is the missing part after the export:

The issue is reproducible with PDF form fields and setting Polish characters to the text fields: e.g. "ęóąśłżźćń" 

Edit mode in RadPdfViewer:

Exit edit mode:

Here is a sample code snippet for reproducing the case without UI:

            PdfFormatProvider provider = new PdfFormatProvider();
            RadFixedDocument document = provider.Import(File.ReadAllBytes("file.pdf"), TimeSpan.FromSeconds(10));

            foreach (RadFixedPage page in document.Pages)
            {
                foreach (Annotation annotation in page.Annotations)
                {
                    if (annotation.Type == AnnotationType.Widget)
                    {
                        Widget widget = (Widget)annotation;
                        var field = widget.Field as TextBoxField;
                        if (field != null) 
                        {
                            field.Value = "ęóąśłżźćń.";
                        }
                    }
                }
            }
            string outputFilePath = "result.pdf";
            File.Delete(outputFilePath);
            File.WriteAllBytes(outputFilePath, provider.Export(document, TimeSpan.FromSeconds(10)));
            Process.Start(new ProcessStartInfo() { FileName = outputFilePath, UseShellExecute = true });

Generate a sample document with RadPdfProcessing and export it with AES-256 encryption. Try to open it on an iPhone with the default Pdf Viewer of iOS. The document is empty. However, the mobile version of Adobe for iOS opens the document successfully.

Read the documentation for CancelationTokenSource.CancelAfter:

this method will throw an ArgumentOutOfRangeException when: delay.TotalMilliseconds is less than -1 or greater than Int32.MaxValue (or UInt32.MaxValue - 1 on some versions of .NET). Note that this upper bound is more restrictive than TimeSpan.MaxValue.

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your code in CancelationTokenSourceFactory.CreateTokenSource does this check:

if (timeSpan.HasValue && timeSpan.Value != TimeSpan.MaxValue)

this check for TimeSpan.MaxValue seems totally pointless here, if timeSpan is anything between ~2147483647 and 922337203685476 milliseconds long this will still just throw a ArgumentOutOfRangeException.

I suspect that this check was intended as a way to prevent creating a cancellation timer that never triggers in the CancellationTokenSource, which should look like this:

if (timeSpan.HasValue && timeSpan != Timeout.InfiniteTimeSpan) //Timeout.InfiniteTimeSpan is -1 milliseconds

When creating a data bar conditional formatting with middle axis, a plain data bar with left axis is created instead. Using the following code:

var dataBarValueContext = new DataBarValueContext
{
    MaximumValue = new NumericValue(1),
    MinimumValue = new NumericValue(-1)
};
// Create the rule and set the desired formatting
var rule = new DataBarRule(dataBarValueContext)
{
    UseGradientFill = false,
    Direction = DataBarDirection.Context,
    FillColor = ThemableColor.FromColor(Colors.Green),
    NegativeFillColor = ThemableColor.FromColor(Colors.Red),
    ShowBarsOnly = true,
    AxisPosition = DataBarAxisPosition.Automatic
};

var conditionalFormat = new ConditionalFormatting(rule);

worksheet.Cells[0, 0, 1, 0].AddConditionalFormatting(conditionalFormat);
worksheet.Cells[0, 0].SetValue(0.5);
worksheet.Cells[1, 0].SetValue(-0.5);

The expected value is this:

The result value is instead:

The value of the TextBoxField is not visible until the field is clicked.

Workaround: Force content update:

foreach (var widget in textBoxField.Widgets)
{
    widget.RecalculateContent();
}

If the update still doesn't fix the issue, change the font prior to setting the value of the field:

foreach (var widget in textBoxField.Widgets)
{
    widget.TextProperties.Font = FontsRepository.Helvetica;
}

When a format string of type: _ * # ##0_ ;_ * -# ##0_ ;_ * "-"??_ ;_ @_  is set through code and the culture settings of the machine are set so that the number grouping symbol is space, the resulting format string comes out incorrect on export: _,*,# ##0_,;_,*,-# ##0_,;_,*,"-"??_,;_,@_, 

This will happen every time the symbols in-between and after _ and * coincide with the number group separator.

Hi there I have a pdf and whenever I try to Import the PDF file into PdfFormatProvider.Import method for flattening purposes, it throws null reference exception.

I have added a sample .net project with PDF added as source. You just need to run the project on your end. I am using version 2023.3.1106 of document processing library.

I am using ASP.NET 4.8 framework.

Thanks