PDFsharp & MigraDoc Forum

Hi-
I am totally new to PDFsharp & MigraDoc. (used itextsharp in the past)
I've been tasked with upgrading one of our tools to .NET 6.0.
Looks like preview-2 is in process of moving to .NET6 as well, so I upgraded our application to use PDFsharp-MigraDoc-GDI (6.0.0-preview-2)

However, when I run a test, I am getting the following exception:

System.InvalidOperationException: 'ParagraphIterator' must not be null here.
at PdfSharp.Diagnostics.NRT.ThrowOnNull[TResult](String message)
at MigraDoc.Rendering.ParagraphRenderer.InitFormat(Area area, FormatInfo previousFormatInfo)
at MigraDoc.Rendering.ParagraphRenderer.Format(Area area, FormatInfo previousFormatInfo)
at MigraDoc.Rendering.TopDownFormatter.FormatOnAreas(XGraphics gfx, Boolean topLevel)
at MigraDoc.Rendering.FormattedDocument.Format(XGraphics gfx)
at MigraDoc.Rendering.DocumentRenderer.PrepareDocument()
at MigraDoc.Rendering.PdfDocumentRenderer.PrepareDocumentRenderer(Boolean prepareCompletely)
at MigraDoc.Rendering.PdfDocumentRenderer.PrepareRenderPages()
at MigraDoc.Rendering.PdfDocumentRenderer.RenderDocument()
...


I checked the known issues for 6.0.0-preview-2, but didn't see anything.
Has anyone else experienced this?
This is probably due to incorrect setup in our application of course. But as I have virtually no experience with our own tool, and we have no support, I thought I would ask here first if there is some obvious issue that could be easily fixed before I dive into it.

Many thanks!
duckworth

Thanks for the feedback.

We would check what's going on if we could replicate the issue.
See also:
https://docs.pdfsharp.net/General/IssueReporting.html

_________________
Best regards
Thomas
(Freelance Software Developer with several years of MigraDoc/PDFsharp experience)

Thanks.
I'll get something together to replicate the issue this weekend and following the IssueReporting link.
(I was hoping there would be an "oh, it's obvious, you forgot to do this..." answer )
The samples that are available for the prior to .NET6 version all should work on this 6.0.0-preview-2 version, correct?

duckworth

I think so. But few require code changes to make them compile.

_________________
Best regards
Thomas
(Freelance Software Developer with several years of MigraDoc/PDFsharp experience)

I checked the source code and it seems there is a new check that is too strict.
However, the check gets never triggered with our test code.

I think we'll remove that check with preview-3 anyway, but if we get sample code from you that triggers the check and allows us to verify that everything works fine when the check is removed, this would be great. Thanks in advance.

_________________
Regards
Thomas Hoevel
PDFsharp Team

I am also running into this error. What's strange is my test work fine and do not return this error, but when I use it in a web api, it is generating the error.

When is preview 3 being released?

I believe I can reproduce this error now. When I create a paragraph and add text to it that has a return on it, I am getting the error:

Now, if I add a space after the return like so:

Seems to work fine.

Sorry, but I don't get an error with that code.

_________________
Regards
Thomas Hoevel
PDFsharp Team