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Normal Topic Saving A Diagram Asynchronously (Read 2080 times)
integragreg
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Saving A Diagram Asynchronously
Sep 24th, 2009 at 9:03pm
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We are trying to put the call to Diagram.SaveToXml() on a BackgroundWorker thread so that it does not interrupt the main application thread.

Because of cross-thread security, we are using the diagram's Dispatcher to call SaveToXml() like so:

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currentDiagram.Dispatcher.BeginInvoke(new System.Action(() => currentDiagram.SaveToXml(diagramFilePath)));


When we do it in this manner, we get a SerializationException with the following message:

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Type 'System.Windows.Media.SolidColorBrush' in Assembly 'PresentationCore, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' is not marked as serializable.


Everything works fine if we save the diagram from the main application thread.

Can anyone suggest an alternative method for saving a diagram asynchronously?

Thanks,

Greg
  
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Stoyo
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Re: Saving A Diagram Asynchronously
Reply #1 - Sep 25th, 2009 at 12:42pm
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This worked in our test, with a few ShapeNodes and links in the diagram. Could you copy the exception stack trace here?
  
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integragreg
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Re: Saving A Diagram Asynchronously
Reply #2 - Sep 25th, 2009 at 12:47pm
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Actually, it may be an issue in our implementation.

We have a custom object that is assigned to the diagram's Tag property, and if we set that to null just before saving the diagram, everything works.

We're looking into what could be causing the problem with serializing the tag.

Greg
  
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