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PdfExporter - NullReferenceException
Oct 29th, 2007 at 9:14am
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	PdfExporter pdfExporter = new PdfExporter();
	pdfExporter.Export(diagram, path);

(path is not null and valid)
throws following NullReferenceException

Code
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Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.
   bei MindFusion.Pdf.PdfPath.x7352b4255a638e05()
   bei MindFusion.Pdf.PdfPath..ctor(GraphicsPath path, Brush brush, PdfPage page, Boolean CreatedDirectly)
   bei MindFusion.Pdf.PdfPath..ctor(GraphicsPath path, Brush brush, PdfPage page)
   bei MindFusion.Pdf.PdfPage.AddObject(GraphicsPath path, Brush brush)
   bei MindFusion.Pdf.PdfGraphics.FillPath(Brush brush, GraphicsPath path)
   bei MindFusion.Diagramming.ShapeNode.xc79d59e9288101bd(IGraphics x41347a961b838962, RectangleF xa6236fc5cd405c4e, Boolean x2f9dabff87b2168b, Brush xb45de92d01a0ec1f, Pen x9c79b5ad7b769b12, RenderOptions xdfde339da46db651)
   bei MindFusion.Diagramming.ShapeNode.DrawShadow(IGraphics graphics)
   bei MindFusion.Diagramming.Diagram.x826b585edd6a93e2(IGraphics x41347a961b838962, RectangleF xa6236fc5cd405c4e, Boolean x979174172ae18db3)
   bei MindFusion.Diagramming.Diagram.Draw(IGraphics graphics, RenderOptions options, RectangleF clipRect, Boolean noModifiedItems)
   bei MindFusion.Diagramming.Export.PdfExporter.Export(Diagram diagram, String filePath)
...


What's wrong?
  
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Stoyo
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Re: PdfExporter - NullReferenceException
Reply #1 - Oct 29th, 2007 at 9:31am
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There was a similar problem in version 5.0 because the Clone() method of one of the GDI Brush types used to return null. Version 5.0.1 does not call Clone(), so that should be fixed there. Check if the new version works better for you, and if it doesn't, please email us your diagram saved in a file.

Stoyan
  
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Re: PdfExporter - NullReferenceException
Reply #2 - Oct 30th, 2007 at 7:26am
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This problem occurs with version 5.0.1.

How can I send you the diagram via XML file?

After calling
Code
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diagram.SaveToXml(fileName);

I got a SerializationException caused by a non-serializable tag object although you can find in the documentation following sentence
Quote:
If a tag is not serializable it won't be saved by the Save* methods.


SerializationException:
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Der Typ ... ist nicht als serialisierbar gekennzeichnet.
   bei System.Runtime.Serialization.FormatterServices.InternalGetSerializableMembers(RuntimeType type)
   bei System.Runtime.Serialization.FormatterServices.GetSerializableMembers(Type type, StreamingContext context)
   bei System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitMemberInfo()
   bei System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.InitSerialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter)
   bei System.Runtime.Serialization.Formatters.Binary.WriteObjectInfo.Serialize(Object obj, ISurrogateSelector surrogateSelector, StreamingContext context, SerObjectInfoInit serObjectInfoInit, IFormatterConverter converter, ObjectWriter objectWriter)
   bei System.Runtime.Serialization.Formatters.Binary.ObjectWriter.Serialize(Object graph, Header[] inHeaders, __BinaryWriter serWriter, Boolean fCheck)
   bei System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph, Header[] headers, Boolean fCheck)
   bei System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Serialize(Stream serializationStream, Object graph)
   bei MindFusion.Diagramming.XmlPersistContext.WriteObject(Object objectValue, String elementName, XmlElement parentElement)
   bei MindFusion.Diagramming.XmlPersistContext.WriteTag(Object item, Object tagValue, String elementName, XmlElement parentElement)
   bei MindFusion.Diagramming.DiagramItem.SaveToXml(XmlElement xmlElement, XmlPersistContext context)
   bei MindFusion.Diagramming.DiagramNode.SaveToXml(XmlElement xmlElement, XmlPersistContext context)
   bei MindFusion.Diagramming.ShapeNode.SaveToXml(XmlElement xmlElement, XmlPersistContext context)
   bei MindFusion.Diagramming.XmlPersistContext.xcfee0917c3bf82cc(DiagramItem xccb63ca5f63dc470, XmlElement x1ea18269223b2a9c, String x121383aa64985888)
   bei MindFusion.Diagramming.Diagram.SaveToXml(XmlDocument document)
   bei MindFusion.Diagramming.Diagram.SaveToXml(String fileName)
  
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Re: PdfExporter - NullReferenceException
Reply #3 - Oct 30th, 2007 at 7:34am
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Handle the SerializeTag event, and just set e.Handled = true.

Stoyan
  
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Re: PdfExporter - NullReferenceException
Reply #4 - Oct 30th, 2007 at 1:25pm
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Thank you. Email has been sent...
  
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Stoyo
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Re: PdfExporter - NullReferenceException
Reply #5 - Oct 30th, 2007 at 6:36pm
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We have found one bug when testing with your diagram - the symbols with umlauts mess up badly the PdfExporter output, and Acrobat Reader cannot open the PDF file at all. The PDF was exported fine when we removed the umlauts -
http://www.mindfusion.org/_samples/test.pdf

However, this seems unrelated to the PdfPath exception that you are getting, which we cannot reproduce. Are you perhaps handling any custom-draw events? If so, could you send us your code?

Thank you,
Stoyan
  
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Re: PdfExporter - NullReferenceException
Reply #6 - Nov 5th, 2007 at 8:40am
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Hi,

What regional settings are you using on your system?

Thank you,
Stoyan
  
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Re: PdfExporter - NullReferenceException
Reply #7 - Nov 8th, 2007 at 7:43am
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We have fixed a couple of bugs in the PdfGraphics implementation:

- if a decimal symbol different from "." was selected in Control Panel / Regional Settings, this produced invalid PDF output
- umlauted or accented characters produced invalid PDF output

If anyone is interested in using the PdfExporter on non-English systems or with Unicode text, please try this version and let us know if you get any problems:
https://mindfusion.org/_beta/fcnet502.zip

Thank you,
Stoyan
  
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Re: PdfExporter - NullReferenceException
Reply #8 - Nov 13th, 2007 at 9:05am
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Hi,

I replaced all libraries with your provided fix but following exception still occurs
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Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.
   bei MindFusion.Pdf.PdfPath.x7352b4255a638e05()
   bei MindFusion.Pdf.PdfPath..ctor(GraphicsPath path, Brush brush, PdfPage page, Boolean CreatedDirectly)
   bei MindFusion.Pdf.PdfPath..ctor(GraphicsPath path, Brush brush, PdfPage page)
   bei MindFusion.Pdf.PdfPage.AddObject(GraphicsPath path, Brush brush)
   bei MindFusion.Pdf.PdfGraphics.FillPath(Brush brush, GraphicsPath path)
   bei MindFusion.Diagramming.ShapeNode.xc79d59e9288101bd(IGraphics x41347a961b838962, RectangleF xa6236fc5cd405c4e, Boolean x2f9dabff87b2168b, Brush xb45de92d01a0ec1f, Pen x9c79b5ad7b769b12, RenderOptions xdfde339da46db651)
   bei MindFusion.Diagramming.ShapeNode.DrawShadow(IGraphics graphics)
   bei MindFusion.Diagramming.Diagram.x826b585edd6a93e2(IGraphics x41347a961b838962, RectangleF xa6236fc5cd405c4e, Boolean x979174172ae18db3)
   bei MindFusion.Diagramming.Diagram.Draw(IGraphics graphics, RenderOptions options, RectangleF clipRect, Boolean noModifiedItems)
   bei MindFusion.Diagramming.Export.PdfExporter.Export(Diagram diagram, String filePath)


Is it possible that an invalid tagged object (Property Tag) can cause this problem?

Btw: My regional settings are "Deutsch(Österreich)" (German - Austria).
  
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Re: PdfExporter - NullReferenceException
Reply #9 - Nov 13th, 2007 at 9:22am
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Hi,

Could you also send us the Diagram and DiagramView related code from your form's InitializeComponent method?

Thank you,
Stoyan
  
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Re: PdfExporter - NullReferenceException
Reply #10 - Nov 23rd, 2007 at 12:10pm
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Finally, after spending a lot of time analyzing this problem I found out that the pdf exporter struggles with color value
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Color.Transparent

Especially a transparent shadow color (to turn off shadow) may cause crashes.
  
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Re: PdfExporter - NullReferenceException
Reply #11 - Dec 18th, 2007 at 1:21pm
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Hi,

The Color.Transparent problem should be fixed in version 5.0.2. Please check if the beta version will work better for you:
https://mindfusion.org/_beta/FCNet.5.0.2.Beta.zip

Stoyan
  
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Re: PdfExporter - NullReferenceException
Reply #12 - Dec 21st, 2007 at 9:51am
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Now it works, thx!
  
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