InvalidCastException when opening file

[Vladimir]

Hello!

 

I get exceptions when open some files using method Import() in PdfFormatProvider.

I prepared 1 such file to you for tests: http://u.pc.cd/3TlctalK

Version of libraries which I use is 2020.3.915

 

 

I noticed, that exceptions appears for files with outlines.

There is DestinationConverter object and its method ConvertFromArray where that exception appears.

 

Here is exception message:

Unable to cast object of type "Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfReal" to type "Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfName".

Here is a StackTrace:

   in Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExceptionHandler.TryHandle(Exception exception)
   in Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.ImportOverride(Stream input)
   in PdfViewer.States.AppStateExtensions.ReadDocumentForTelerik(String filePath)

 

My method:

internal static RadFixedDocument ReadDocumentForTelerik(string filePath)
{
    if (filePath == null)
        throw new ArgumentNullException(nameof(filePath));

    using (Stream stream = File.Open(filePath, FileMode.Open, FileAccess.Read))
    {
        var provider = new PdfFormatProvider();
        provider.ImportSettings = PdfImportSettings.ReadOnDemand;
        return provider.Import(stream);
    }
}

 

Using:

var doc = ReadDocumentForTelerik(@"C:\Outline_Down.pdf");

 

[n/a]

I found another exception 

Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfReal' to type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Types.PdfInt'.

Here is StackTrace:

   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Collections.Generic.Stack`1.Peek()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.Parser.PostScriptReader.PushToken(IPdfPrimitive primitive)
   at Telerik.Windows.Documents.Data.StateMachine.State`1.ExecuteActionIfNotNull(Action`1 action, TArgs arguments)
   at Telerik.Windows.Documents.Data.StateMachine.StateMachine`1.GoToState(State`1 state, TArgs arguments)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.Parser.PostScriptReader.ReadAllPrimitivesToToken(IPdfImportContext context, PdfElementType tokenType)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.Parser.PostScriptReader.Read[T](IPdfImportContext context, PdfElementType tokenType)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.BaseImportContext.ReadUsedIndirectObject(CrossReferenceEntry entry)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.BaseImportContext.ReadIndirectObject(IndirectReference reference)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Converters.PrimitiveWrapperConverter.Convert(Type type, PostScriptReader reader, IPdfImportContext context, IPdfPrimitive value)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Data.PdfPropertyBase`1.PrepareValue(PostScriptReader reader, IPdfImportContext context, IPdfPrimitive value)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Data.LoadOnDemandPropertyBase`1.GetValueFromSource()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Data.LoadOnDemandPropertyBase`1.GetValue()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Utilities.PdfObjectsExtensions.GetInheritableProperty[T,V](ITreeNode`1 node, Func`2 getPropertyFromNodeValue, V defautValue)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Forms.FieldPropertiesImporter.InitializeSignatureFieldProperties(SignatureField signatureField)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.<>c__DisplayClass53_0.<CopyFormFieldsTo>b__0()
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.ImportOverride(Stream input)

Document has several digital signatures inside.

But with
pdfFormatProvider.ImportSettings.UseOldRendering = false 

is working. 

 

 

 

[Martin]

Hi Janez, 

The stack trace is not sufficient to determine the reason for this exception, so in order to investigate the case we will need to examine the document causing the exception. Could you open a private ticket thread and send it to us?

I must assure you we treat all client files in a strictly confidential manner and for testing purposes only.

[Martin]

Hi Vladimir,

Thank you for the provided feedback and document.

It seems this behavior is caused because the document contains an invalid outline (a.k.a. bookmark) destination. I logged a feature request on your behalf in our backlog to handle this import: PdfProcessing: Handle import of documents containing outlines with an invalid destination set. You can cast your vote for the implementation as well as subscribe to the task by clicking the Follow button so you can receive updates when its status changes.

In appreciation for bringing this to our attention, I updated your Telerik points.

Regards,
Martin
Progress Telerik