I am trying to use Telerik document processing to append some text to an existing pdf document. The text is in Arabic language, that is,  it is Unicode and it has  right to left direction. The resulted pdf document does not show the text even though I can it render the text if I changed the text to  English.

Does Telerik pdf document processing library support Arabic text?

Hi,

I'm using IWorksheetExporter (Telerik.Documents.SpreadsheetStreaming library)  to create big Excel files, ~400 mb xlsx.

I need to add notes to header cells like what is available here https://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/notes but it doesn't look to be available in the Streaming library.

I see two possible workarounds.

1. Create my header row with RadSpreadProcessing and reopen the same file for the batch processing with the streaming dll. But I can't find how to append to a worksheet, the only thing that looks like appendable to an existing file is new worksheet.
2. Create the big file with the streaming library and reopen it with RadSpreadProcessing to add the notes. What will be the performance hit to do that? Does opening an excel file load everything in memory? So saving it back will also recreate the whole file?
3. Do you have another solution

NB. Trying to completely create this file via the RadSpreadProcessing library throw a "Stream was too long" from within the library while saving it.

NB. I'm using the latest version from the nuget stream.

Thanks

I have installed the necessary nuget packages for pdf processing in an exisiting Asp.Net Core (.Net 7.0) Blazor project.

- Telerik.Windows.Documents.Core 2023.1.104
- Telerik.Windows.Documents.Fixed 2023.1.104
- Telerik.Windows.Zip 2023.1.104

In the OnClick handler of a button, the first line of code throws an exception:                   

       public void EditPdfDocument(MouseEventArgs args)
        {
            var provider = new PdfFormatProvider(); // exception is thrown here
            var doc = provider.Import(File.ReadAllBytes(@"path-to-file.pdf"));

            // ...
        }

Exception details:

System.TypeLoadException
  HResult=0x80131522
  Message=Could not load type 'System.Windows.Rect' from assembly 'WindowsBase, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
  Source=Telerik.Windows.Documents.Fixed
  StackTrace:
   at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider..ctor()
  ...

Hello,

I would like to know how can i rotate a given pdf document using Telerik Document Processing Library.

Thank you

Hi,

Is there a way using the Telerik SpreadProcessing library to manipulate the external references in an Excel file?

eg change the source to another file?

thx in advance!

How can I format a set of ranges in a worksheet as a table using document processing?

I couldn't find any source to this matter.

I have attached a screenshot of the Excel function is needed to the desired result.

Hi there,

I am using the trial version at the moment to see if Telerik's document processing can replace another library we are currently using.

Here is our scenario,

We have a Word template document that has merge fields already setup and tables with borders already setup. This word template is read from a database table column into a memory stream and then we use the DocxFormatProvider to import the document to the RadFlowDocument. Below you can see a piece of the template document already setup.

When using EnumerateChildrenOfType<Table>().ElementAt(1) for example I can see that the table is selected and I can see that the border values have been picked up from the word template document. Below inspecting object for the table selected from the template document.

We then perform our mail merge and then use PdfFormatProvider to convert the merge result into a PDF document. The result is that the mail merge fields are merged correctly but all the tables have lost there borders that the original word template document had.

I have tried to after using EnumerateChildrenOfType<Table>().ElementAt(1)  to set the border again manually with new TableBorders(new Border(2, Telerik.Windows.Documents.Flow.Model.Styles.BorderStyle.Dotted, new ThemableColor(Colors.Black))); This also does not work.

Here is the PDF result produced, any suggestions would be appreciated. (Also a note, even if I take out mail merge in the process, the document converting straight from Word Template to PDF still produces the tables with no borders...)

Another note when I use your demo link and load my template and export to PDF the borders are also missing. (Telerik Export to PDF)

Hi

I have been able to merge PDFs files all together into a single document by using File.OpenRead to read into a PdfFIleSource and then use the PdfStreamWriter WritePage method to concatenate them all.

But now I want to scale down the pages to be able to add page numbering.

I haven't been able to use scale down (reduce) using the previous method.

I have found another mechanism (https://www.telerik.com/forums/scaling-pdf-document) that is reading the input pages into a RadFixedDocument before adding them with WritePage to the PdfStreamWriter. This works (page are reduced as I want) but when input PDFs are annoted (textboxes or images), the annotations are not added to the scaled down output.

Do you have a sample that is doing that (merge scale down input files while keeping annotations)?

Hi!

How can I make a custom font work, when importing a HTML string and printing it to pdf? Im loosing the "ÄÖÜ" characters currently and know that this is a font related issue.

var htmlDocument = new Telerik.Windows.Documents.Flow.FormatProviders.Html.HtmlFormatProvider();

// Regular Font
byte[] fontData = System.IO.File.ReadAllBytes("fonts/verdana.ttf");
Telerik.Documents.Core.Fonts.FontFamily fontFamily = new Telerik.Documents.Core.Fonts.FontFamily("CustomVerdana");
FontsRepository.RegisterFont(fontFamily, FontStyles.Normal, FontWeights.Normal, fontData);

var doc = htmlDocument.Import("<html><body style=\"font-family:CustomVerdana;\">Das ist ein test. <br> <strong>ÖOÜUÄA</strong></body></html>");

var fileName = "output.pdf";
var pdf = new Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider();
using (Stream output = System.IO.File.OpenWrite(fileName))
{
      pdf.Export(doc, output);
 }

Hi ,
I cannot figure out how to add an invisible signature to an existing PDF.

My test code:

var pdfIn = "C:\\Prg\\Test\\TestTelerikPDF\\pdf\\demo.pdf";
var pdfSigned = $"{pdfIn}.sign.pdf";
var pfx = "C:\\Prg\\Test\\TestTelerikPDF\\pdf\\Cert.pfx";

using (var input = new FileStream(pdfIn, FileMode.Open, FileAccess.Read))
{
    var document = new PdfFormatProvider().Import(input);

    var certificate = new X509Certificate2(pfx, "passs");
    var signatureField = new SignatureField("Blabla");
    signatureField.Signature = new Signature(certificate);

    document.AcroForm.FormFields.Add(signatureField);

    var settings = new PdfExportSettings();
    settings.ComplianceLevel = PdfComplianceLevel.PdfA3B;

    var formatProvider = new PdfFormatProvider();
    formatProvider.ExportSettings = settings;

    using (var ms = new FileStream(pdfSigned, FileMode.Create))
        formatProvider.Export(document, ms);
}

This code create an output PDF but the signature is missing :-(

Can you help me please?

Best

Kamil