Questions on Telerik Document Processing Forum

1 answer

5 views

HTML to PDF with page-break-inside: avoid and background page

Hello,

I'm trying to rewrite a PDF-generator function that creates a PDF from HTML (which is the result of an XSLT+xml transform) using another HTML to PDF library to a new function that uses the Telerik methods. That works Ok, but there are 2 things I can't figure out how to do (if even possible) :

- The HTML content consists of a table with uneven row heights, depending on the content. Some rows contain images, some don't. So, I can't determine beforehand which row needs to start on a new page. Currently, I use page-break-inside: avoid on the rows, and that works with the other library, but not with the Telerik methods. Some rows are split over two pages. How can I prevent an element from breaking up over two pages?

- With the current library, I'm able to provide a separate PDF file that is used as a background for every rendered page. That PDF is a single-page PDF with the 'corporate stationery' (don't know how that's called ;-), so the resulting PDF contains multiple pages with the HTML output in the company style. Is something like that possible with the Telerik methods? I know how to draw a small HTML snippet on a single PDF page, but I can't figure out how to convert HTML to PDF with this background on every page.

Any help is appreciated.

Regards,
Kees

PdfProcessing

WordsProcessing

answered on 13 Oct 2025

1 answer

9 views

Is it possible to assign html formatted text to PDF form text field?

I am looking at this example. Is it possible to format the text using HTML tags?

For ex: can the textboxvalue = <b>text</b>?

void ProcessTextBox(TextBoxField textBoxField, string textboxValue)
    {
        textBoxField.Value = textboxValue;
    }

https://demos.telerik.com/blazor-ui/pdfprocessing/read-and-write-form-fields

PdfProcessing

answered on 17 Sep 2025

4 answers

38 views

Telerik signed PDFs aren't recognized due to time stamp

I've obtained a x509 signing certificate and able to use it with Telerik PDF processing to generate a signed PDF. The problem is that none of the signatures are valid because of the time stamp!

There doesn't appear to be any way to insert a TSA timestamp with the signing flow.

How can I fix this, the Telerik signatures are useless otherwise.

Thanks!

PdfProcessing

answered on 29 Jul 2025

0 answers

26 views

Pdf Processing - Adding barcode does not show anything

I am trying out the document processing library and the barcode formsource (https://docs.telerik.com/devtools/document-processing/libraries/radpdfprocessing/model/formsource/barcode).

When I add the barcode, I get a white pdf. If I leave barcode off it, everything else shows up. Any idea what i am doing wrong?

Example file:

 internal class DocGenerator
 {
     public void CreateDocument()
     {
         var document = new RadFixedDocument();
         var page = document.Pages.AddPage();
         page.Size = new Size(595, 842); // A4 size

         var editor = new FixedContentEditor(page);

         //editor.Position.Translate(0, 0);
         //FormSource barcode = FormSource.FromBarcode(Symbology1DType.Code128, "1234567890", width: 100, height: 100);
         //editor.DrawForm(barcode, 100, 100);

         editor.Position.Translate(20, 20);

         // Title
         editor.DrawText("P 24-07-2024 12:03");
         editor.Position.Translate(300, 20);
         editor.DrawText("Person X");

         // Aisle and Pallet
         editor.Position.Translate(20, 60);
         editor.DrawText("AISLE");
         editor.Position.Translate(100, 60);
         editor.TextProperties.FontSize = 36;
         editor.DrawText("A101");

         editor.Position.Translate(20, 150);
         editor.TextProperties.FontSize = 12;
         editor.DrawText("P");
         editor.Position.Translate(100, 150);
         editor.TextProperties.FontSize = 36;
         editor.DrawText("0237");

         AddBarcode(editor);


         editor.TextProperties.FontSize = 10;
         var blackColor =  new RgbColor(0, 0, 0);
         Table table = new Table();
                     table.Borders = new TableBorders(
             new Border(1, blackColor), // Top
             new Border(1, blackColor), // Right
             new Border(1, blackColor), // Bottom
             new Border(1, blackColor) // Left
         );

         AddTableRows(table);
         editor.Position.Translate(20, 240);
         editor.DrawTable(table);

         using (Stream output = File.OpenWrite(@"c:\temp\Output.pdf"))
         {
             PdfFormatProvider flowPdfProvider = new();
             flowPdfProvider.Export(document, output, new TimeSpan(0,0,10));
         }
     }

     private void AddBarcode(FixedContentEditor editor)
     {
         editor.Position.Translate(150, 150);
         FormSource barcodeWithCenterCenterText = FormSource.FromBarcode(Symbology1DType.Code128, "1234567890", showText: true);
         editor.DrawForm(barcodeWithCenterCenterText, 100, 100);
     }

     private void AddTableRows(Table table)
     {
         string[][] rows = new[]
         {
   new[] { "P", "PNo", "Brut", "Net", "Quality", "Pattern", "Pr", "Co", "Ac"  },
   new[] { "1000", "1001", "119,50", "118,70", "P1", "", "C1", "U1" },
   new[] { "1000", "1002", "120,00", "119,40", "P1", "", "C1", "U1" },
   new[] { "1000", "1003", "112,80", "112,10", "P1", "", "C1", "U1" },
   new[] { "1000", "1004", "120,50", "120,00", "P1", "", "C1", "U1" },
   new[] { "1000", "1005", "114,40", "113,50", "P1", "", "C1", "U1" },
   new[] { "1000", "1006", "114,40", "113,70", "P1", "", "C1", "U1" },
   new[] { "1000", "1007", "104,00", "102,60", "P1", "", "C1", "U1" },
   new[] { "1002", "1008", "99,80", "99,40", "P2", "", "C2", "H1" },
   new[] { "1002", "1009", "100,40", "100,00", "P2", "", "C2", "H1" },
   new[] { "1002", "1010", "100,40", "99,40", "P2", "", "C2", "H1" },
   new[] { "1002", "1011", "73,30", "72,50", "P2", "", "C2", "H1" },
   new[] { "1002", "1012", "100,00", "99,80", "P2", "", "C2", "H1" },
   new[] { "1002", "1013", "74,30", "73,80", "P2", "", "C2", "H1" },
   new[] { "1002", "1014", "105,00", "104,30", "P2", "", "C2", "H1" },
     };

         foreach (var rowValues in rows)
         {
             var row = table.Rows.AddTableRow();
             foreach (var value in rowValues)
             {
                 var cell = row.Cells.AddTableCell();
                 cell.Blocks.AddBlock().InsertText(value);
             }
         }
     }
}

PdfProcessing

updated question on 30 Jun 2025

1 answer

28 views

PDF Processing Template outside of C# Code

https://www.telerik.com/document-processing-libraries/pdf-processing

Folks,

For a new project I need to generate a dynamic multi page pdf and one of the mandatory requirements is that some kind of template (html, xml, word) is used for easier maintance purposes.

Is it correct that for the Telerik PDF processing Library the only way to define pdfs is directly in the c# code and not some kind of template?

Thank you

Valentin

PdfProcessing

answered on 22 May 2025

1 answer

30 views

PDF Processing PDF/UA

PdfProcessing - Developer Focused Examples - Telerik Document Processing

Hi,

we need to generate PDF/UA comform pdfs from scratch. Is that possible with Telerik PdfProcessing? I know that PDF/A works but we need PDF/UA specifically.

Thank you,

Valentin

PdfProcessing

answered on 20 May 2025

1 answer

35 views

Add Variables Into Header (Word/PDF)

Is it possible to add text to headers based on variables/database fields? I'm trying to loop through a table and use a field within the table as a page title, but all information I could find on this points to it being impossible in Telerik. Guidance would be much appreciated.

Thanks

PdfProcessing

WordsProcessing

answered on 07 Apr 2025

1 answer

94 views

Formulas in XLSX not calculated when exporting to PDF

Im using:
var xlsxProvider = new XlsxFormatProvider();
var pdfFormatProvider = new PdfFormatProvider();

byte[] docBytes = File.ReadAllBytes(path);
Workbook workbook = xlsxProvider.Import(docBytes, null);

byte[] resultBytes = pdfFormatProvider.Export(workbook, null);
File.WriteAllBytes(resultPath, resultBytes);

to conver xlsx file to pdf. In source xlsx file a have a Table and a formula '=SUBTOTAL(109, Table2[...]) that work in xlsx, but when i export it to PDF i need to have the calculated value, but instead im getting the string '=SUBTOTAL(109, Table2[...]) .

Is there a simple way to force calculation of all formulas in the sheet before exporting it to PDF?

PdfProcessing

SpreadProcessing

answered on 28 Feb 2025

1 answer

74 views

.docx file contents being cut-off when converted to .pdf

The contents of an uploaded .docx file is being cut-off when converted to .pdf file.

Code snippet:

var fileFormatProvider = new Telerik.Windows.Documents.Flow.FormatProviders.Docx.DocxFormatProvider();

using (MemoryStream inputFileStream = new MemoryStream())
{
    this.fileSystemService.GetFile(documentInfo, inputFileStream);
    if (fileFormatProvider != null)
    {
        var document = fileFormatProvider.Import(inputFileStream);

        using (MemoryStream output = new MemoryStream())
        {
            var pdfProvider = new Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider();

            pdfProvider.Export(document, output);
            var newFile = new DocumentInfo()
            {
                NameWithPath = outputFileName,
                DocumentLocation = documentInfo.DocumentLocation
            };
            this.fileSystemService.SaveFile(newFile, output);
        }
    }

Can someone confirm if this a Telerik side issue, or am I missing a setting or config?

Thanks!

General Discussions

PdfProcessing

WordsProcessing

answered on 26 Feb 2025

1 answer

53 views

Top & bottom margins will not be less than half inch

I am trying to convert HTML to a PDF document with 0.25" margins. The left and right margins are being set correctly, but the top and bottom margins remain 0.5". My code is below, a screenshot of the generated PDF is attached.

StringBuilder sb = new StringBuilder();

foreach (string row in data)
sb.AppendLine(row);

HtmlFormatProvider provider = new HtmlFormatProvider();
RadFlowDocument html = provider.Import(sb.ToString());

foreach (Section section in html.Sections)
{
section.PageMargins = new Telerik.Windows.Documents.Primitives.Padding(24, 24, 24, 24);

// Code snippet from function that adds header inserted below

Header header = section.Headers.Add();
Table table = header.Blocks.AddTable();
Border border = new Border(1, BorderStyle.Single, new ThemableColor(Colors.Black));
table.Borders = new TableBorders(border);

TableRow row1 = table.Rows.AddTableRow();
row1.Height = new TableRowHeight(HeightType.Exact, 30);

TableCell Title = row1.Cells.AddTableCell();
Paragraph pTitle = Title.Blocks.AddParagraph();
Run rTitle = pTitle.Inlines.AddRun(FormName);
Title.PreferredWidth = Inches(3.99);
Title.Shading.BackgroundColor = gray;
Title.VerticalAlignment = VerticalAlignment.Center;
rTitle.FontWeight = FontWeights.Bold;
rTitle.FontSize = 16;

// Call to similar code for adding footer

}

PdfFormatProvider pdf = new PdfFormatProvider();
return pdf.Export(html);

Thanks in advance for the help.

Darwin Pinder

PdfProcessing

answered on 28 Jan 2025