Hello,
I have upgraded PDFsharp-MigraDoc NuGet package from version 1.5 to 6.0.0 (latest stable) in an ASP.NET application. A piece of old code, which used to work before, always fails with the new version. Our code loads a PDF template document with some pictures and inserts more content into it. Rendering a table using DocumentRenderer crashes with a InvalidOperationException exception.
I have isolated the issue. It's reproducible when I run this code in a console application in .NET8:
Code:
using FileStream templateFile = File.OpenRead("d:\\template.pdf");
PdfDocument templateDoc = PdfReader.Open(templateFile, PdfDocumentOpenMode.Modify);
PdfPage page = templateDoc.Pages[0];
XGraphics gfx = XGraphics.FromPdfPage(page);
Document doc = new();
Table table = doc.AddSection().AddTable();
table.AddColumn(Unit.FromCentimeter(5));
table.AddColumn(Unit.FromCentimeter(5));
table.AddColumn(Unit.FromCentimeter(5));
var row = table.AddRow();
row.Style = "Row";
row.Cells[0].AddParagraph("Cell1");
row.Cells[1].AddParagraph("Cell2");
row.Cells[2].AddParagraph("Cell3");
DocumentRenderer docRenderer = new(doc);
docRenderer.PrepareDocument();
docRenderer.RenderObject(gfx, XUnit.FromCentimeter(1.0), XUnit.FromCentimeter(11.0), "12cm", table);
Running it with PDFsharp-MigraDoc 6.0.0 or 6.1.0-preview-1 throws this exception:
Code:
Unhandled exception. System.InvalidOperationException: 'FieldInfos' must not be null here.
at PdfSharp.Diagnostics.NRT.ThrowOnNull[TResult](String message)
at MigraDoc.Rendering.FormattedCell.MigraDoc.Rendering.IAreaProvider.get_AreaFieldInfos()
at MigraDoc.Rendering.TopDownFormatter.FormatOnAreas(XGraphics gfx, Boolean topLevel)
at MigraDoc.Rendering.FormattedCell.Format(XGraphics gfx)
at MigraDoc.Rendering.TableRenderer.FormatCells()
at MigraDoc.Rendering.TableRenderer.InitFormat(Area area, FormatInfo previousFormatInfo)
at MigraDoc.Rendering.TableRenderer.Format(Area area, FormatInfo previousFormatInfo)
at MigraDoc.Rendering.DocumentRenderer.RenderObject(XGraphics graphics, XUnit xPosition, XUnit yPosition, XUnit width, DocumentObject documentObject)
The same code works fine with PDFsharp-MigraDoc ver. 1.5
Is there a bug in the new version?
Is there any better way to add a table into an existing document?
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