I'm having this issue with some digital signed pdfs. 

Here is the code that gets the exception:

var signatureFields = document.AcroForm.FormFields.Where(field => field.FieldType == FormFieldType.Signature).ToList();
            if (signatureFields.IsNotNullOrEmpty())
            {
                foreach (var signatureField in signatureFields)
                {
                    var field = (SignatureField)signatureField;

                    if (field != null && field.Signature != null)
                    {
                        var test = field.Signature.Validate(); - this is the line where I get the exceptions!

 

The method Validate() called without the properties parameter throws exception in 2 cases:

1st - using pdf signed with specialized software

Message: "No signature validation handler was found for the subfilter: ETSI.CAdES.detached

and the StackTrace: at Telerik.Windows.Documents.Fixed.Model.DigitalSignatures.Signature.Validate(SignatureValidationProperties validationProperties)\r\n   at Telerik.Windows.Documents.Fixed.Model.DigitalSignatures.Signature.Validate()\r\n   at... (there goes the path in my project)

2nd - using pdf signed with the same digital signature by Adobe Acrobat Reader

Message "ASN1 bad tag value met.\r\n"

and the StackTrace: at System.Security.Cryptography.Pkcs.SignedCms.OpenToDecode(Byte[] encodedMessage, ContentInfo contentInfo, Boolean detached)\r\n   at System.Security.Cryptography.Pkcs.SignedCms.Decode(Byte[] encodedMessage)\r\n   at Telerik.Windows.Documents.Fixed.Model.DigitalSignatures.Pkcs7Detached.ValidateOverride(SignatureDataProperties dataProperties, SignatureValidationProperties validationProperties)\r\n   at Telerik.Windows.Documents.Fixed.Model.DigitalSignatures.SignatureValidationHandlerBase.Validate(SignatureDataProperties dataProperties, SignatureValidationProperties validationProperties)\r\n   at Telerik.Windows.Documents.Fixed.Model.DigitalSignatures.Signature.Validate(SignatureValidationProperties validationProperties)\r\n   at Telerik.Windows.Documents.Fixed.Model.DigitalSignatures.Signature.Validate()\r\n   at... (there goes the path in my project)

I'll be glad if you can tell me where the problem is and what can I do to fix it. 

I want to be clear, there are just some correctly signed pdfs that cannot pass this validation. Most of them can but I'm afraid that I am missing something, as one of the non-passing digital signatures is new.

 

Hello

I would like to create PDF file, as container for images, (the source of the images is scanner).
I order to make small file size, I'm converting the images from BMP to JPEG and then do the export to PDF file,
but the output file size is huge.
I'm following this example.


1. How can i control the PDF file size?
2. Is the PDF export saves JPEG  image as is or decode and then save it?


My Code:

​

01.void f(List<Bitmap> Images)

02.{

03.  DateTime now = DateTime.Now;

04.  string name = "scan-" + now.ToString("yyyyMMdd") + "-" + now.ToString("HHmmss") + "_3" + ".pdf";

05.             

06.  using (FileStream FileStream = new FileStream(@"c:\Users\avicode\Desktop\tmp\" + name,FileMode.Create))

07.  using (MemoryStream ms = new MemoryStream())

08.             

09.  if (Images.Count >= 1)

10.  {

11.    RadDocument document = new RadDocument();

12.    for (int i = 0; i < Images.Count; i++)

13.    {

14.      System.Drawing.Image oBmpImage = (System.Drawing.Image)Images[Images.Count - 1];

15.      oBmpImage.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

16.      Telerik.Windows.Documents.Model.Section section = new Telerik.Windows.Documents.Model.Section();

17.      Telerik.Windows.Documents.Model.Paragraph paragraph = new Telerik.Windows.Documents.Model.Paragraph();

18. 

19.      ImageInline image = new ImageInline(ms);

20.      paragraph.Inlines.Add(image);

21.      section.Blocks.Add(paragraph);

22.      document.Sections.Add(section);

23. 

24.    }

25.    PdfFormatProvider oPdf = new PdfFormatProvider();

26.    oPdf.Export(document,FileStream);

27.    }

28.}

I need to know how to email a digitally signed PDF document from a user input webform.

I want to set table line style like this attachment. How Can I set this table line style?

Borders I am creating with RadFlowDocumentEditor are not displayed in Radrichtextbox, to demonstrate here is my test code, I am using Telerik UI for WPF R2 2019.

Attached is the file, also how it is displayed in Word and the how it is displayed in the RadRichTextBox inside my application.

 

 

 

How to implement the Document Properties like Author, Company,Title etc of the RadSpreadSheet Excel workbook using the Kendo RadSpreadSheet?

How to keep an Image in the Spreadsheet Header?

currently in the RadSpreadDocuments.HeaderFooterSettings only it supports text in the Page Header but want to display the Image in the Header.

Can anyone know how to keep the image in the Header of the excel workbook?

With the new release of 2019.3, I was trying to add PdfProcessing to my .net core 3 web application. Following the example found in the Telerik UI for ASP.NET Core R3 2019 folder I added the correct references (Telerik.Windows.Documents.Fixed,Telerik.Windows.Documents.Core and so on). On my application it did compile however when using it I got an unhandled exception when I tried to create a new PdfFormatProvider. I don't have the exact wording on me right now but it was a TypeLoadException when trying to load/use Size or Point from WindowsBase. Now given that this is a web application it obviously has no reference to WindowsBase and as such it doesn't work

I have a word doc that i created using RadFlowDocument and i want to convert this to a pdf. i have tried couple of ways and it never worked.

 

        'Exporting the Rad Document to Word Document
        Using output As Stream = File.OpenWrite(directoryPath + "FlexFab.docx")
            Dim provider As DocxFormatProvider = New DocxFormatProvider()
            provider.Export(document, output)
        End Using

        'Convert word to PDF
        Dim fileFormatProvider As IFormatProvider(Of RadFlowDocument) = New DocxFormatProvider()
        Using input As FileStream = New FileStream(filePath, FileMode.Open)
            document = fileFormatProvider.Import(input)
        End Using
        fileFormatProvider = New PdfFormatProvider()
        Using output2 As Stream = New FileStream(directoryPath + "FlexFab.pdf", FileMode.OpenOrCreate)
            fileFormatProvider.Export(document, output2)
        End Using

 

 

The Error that i am getting is :

Unable to cast object of type 'Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider' to type 'Telerik.Windows.Documents.Common.FormatProviders.IFormatProvider`1[Telerik.Windows.Documents.Flow.Model.RadFlowDocument]'.

 

 

 

I also tried the below method and that dosent work either, is there a way i can achieve this.

Dim document  As RadFlowDocument = CreateRadFlowDocument

Dim provider Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider = new Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider();
Dim fixedDocument  As RadFixedDocument = provider.ExportToFixedDocument(document);

 

 

I am having trouble positioning text using text fragment.  I'm not sure if its a scaling issue during import or what

Below is an extract that failes

I created a PDF completely gray with a black box starting at 100x100 pixels from the top left corner (https://www.pastefile.com/sjKGiJ)

The Original PDF was created by printing a blank page from work through adobe acrobat (for sizing) and then edited in illustrator to add the image.

Via the processor

The file is the imported using PdfStreamWriter and result written to a memory stream

The memorystream is the imported using RadFixedDocument  and then text is added at 100x100 position.

Result is written to a file

Resulting file (https://www.pastefile.com/4HZwvR)

The text does not appear at 100x100 but at at ~ 74x70ish

the text font is not Helvetica but Arial

the font size is not 10pt but 5.63 pt

Code below (result is test4.pdf)