After upgrading the Telerik Document Processing libraries to version Q1 2025 the following error messages may occur:

* "The file or assembly cannot be loaded 'Telerik.Licensing.Runtime, Version=1.4.6.0, Culture=neutral, PublicKeyToken=token_here' or one of its dependencies. The system cannot find the specified file."

* "NU1101: Unable to find package Telerik.Licensing. No packages exist with this id in source(s): Telerik nuget. PackageSourceMapping is enabled, the following source(s) were not considered: Microsoft Visual Studio Offline Packages, nuget.org."

I'm using SpreadProcessing in conjunction with a Blazor TelerikSpreadsheet component and I've found that when I copy a cell from any Excel file and paste that into any cell in the TelerikSpreadsheet and then subsequently call XlsxFormatProvider.Import(), it throws an exception with the following message:

Not supported from value: start

I've attached a sample project to demonstrate the issue.

How can I successfully paste from Excel and then call XlsxFormatProvider.Import()?

I'm using SpreadProcessing in conjunction with a Blazor TelerikSpreadsheet component, and as I understand it from the documentation, if I want to mark certain cells as read only, the way to do that is by protecting the worksheet and then unlocking the cells I want to be editable. In my use case I need to disable the cells in the first row but leave all other cells editable and I've encountered two issues.

First, if I set up a loop to spin through the rows (other than the fist row) and mark them as unlocked, as such:

        for (var i = 1; i < worksheet.Rows.Count; i++)
        {
            worksheet.Rows[i].SetIsLocked(false);
        }

The first issue is that worksheet.Rows.Count returns 1,048,576 rows. By default the spreadsheet displays 200 rows. I don't know if that default is on the Blazor side and that it only displays 200 of the 1,048,576 rows that are actually in the worksheet or what, but it's not really reasonable to spin through all those rows attempting to unlock them when they're not even visible. So that's issue number 1.

Issue number 2 is, calling SetIsLocked(false) on each row doesn't actually unlock the row. It has no effect. However I've found that if I call SetIsLocked(false) on a column, the column does get unlocked but if I then try to lock the cell in the first row of that column it doesn't get locked. So it's like the unlock of the column overrides the lock of the individual cell in that column. The only way I've been able to get this to work is as such:

        for (var i = 1; i < 199; i++)
        {
            for (int j = 0; j < columnTitles.Count; j++)
            {
                worksheet.Cells[i, j].SetIsLocked(false);
            }
        }

columnTitles is my list of column headers so I'm really only enabling the cells under the column headers I've added and not the complete row, but that's fine. But I've had to hardcode the highest row index of 199. Again, I don't know where that default comes from but it's not good to hardcode that index because it could always change in a future version.

So my question is, is there a better, more efficient way to lock the first row but unlock all other rows?

I'm using SpreadProcessing in conjunction with a TelerikSpreadsheet in a Blazor app where the user can modify a spreadsheet and click a submit button. In my submit handler I'm using the result of Worksheet.UsedCellRange to set up my loops for the purpose of validation. When the user clicks submit, I get the expected result from Worksheet.UsedCellRange and then I spin the used rows and columns and apply validation. If there are validation errors I make the cell red and then export the workbook back to a memory stream and assign the byte array back to the variable to which the spreadsheet is bound. That works fine.

The issue I'm having is that if the user clicks submit, gets validation errors, makes a change and then clicks the submit button a second time, the result I get from Worksheet.UsedCellRange includes all rows, even if only one or two rows actually have data. To narrow down the issue I removed all my validation logic so I am not making any changes to the cells before I assign the byte array, but the second time through the result of UsedCellRange still reports all rows. Am I not assigning the byte array correctly at the end of my submit method? See code:

    private async Task OnSubmitAsync()
    {
            byte[] sheet = await _spreadsheetRef.ExportToExcelAsync();

            using MemoryStream ms = new(sheet);

            XlsxFormatProvider formatProvider = new();
            Workbook workbook = formatProvider.Import(ms, new TimeSpan(0, 0, 5));
            Worksheet worksheet = workbook.Worksheets.First();

            // The first time through this is correct, second time through it reports all 200 rows are in use. Why?
            CellRange cellRange = worksheet.UsedCellRange;

            // Validation logic would normally go here

            // Set the byte array back to the bound variable
            // Should I be doing this differently?
            ms.SetLength(0);
            formatProvider.Export(workbook, ms, new TimeSpan(0, 0, 30));
            _fileData = ms.ToArray(); // _fileData is bound to the TelerikSpreadsheet component
   }

I've seen a couple other posts here about export performance, but they both refer to relatively large amounts of data. I am having issues so I stripped my example down to the where it's exporting a blank spreadsheet (see code below) but it still takes over 10 seconds running in debug on my laptop. I'm using this in the context of a Blazor app and since this is synchronous the page hangs while the export is running. What can I do to speed this up?

            Workbook workbook = new Workbook();
            Worksheet worksheet = workbook.Worksheets.Add();

            IWorkbookFormatProvider formatProvider = new XlsxFormatProvider();
            using MemoryStream ms = new();
            formatProvider.Export(workbook, ms, new TimeSpan(0, 0, 30)); // This takes over 10 seconds

            _fileData = ms.ToArray(); // byte array that the Blazor component reads

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);
             }
         }
     }
}

After recent update to 2025.2.520.462 I'm unable to extract file and save on disk. ExtractToFile() method is not longer here.
I've changed my usings from Telerik.WinControls.Zip to Telerik.Windows.Zip but I'm missing Telerik.Windows.Zip.Extensions.dll file.

What should I replace method ExtractToFile() with?

There is a code we use right now:

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