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JasonB
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Tags and serialization (save)
Jul 14th, 2008 at 6:46pm
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Hi,

It looks like diagram.SaveToXml() is attempting to serialize the Tag values for my nodes, links, anchor points, etc. My objects are not serializable, and even if they were, serializing them wouldn't work as they need to be specific references to other objects and not just serialized copies. WIth this in mind, is it possible to pass as an option to SaveToXml() a boolean parameter to skip *all* tag values?
  
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Stoyo
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Re: Tags and serialization (save)
Reply #1 - Jul 14th, 2008 at 8:12pm
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Hi,

You could handle the SerializeTag event and set e.Handled = true.

I hope that helps,
Stoyan
  
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JasonB
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Re: Tags and serialization (save)
Reply #2 - Jul 15th, 2008 at 2:09pm
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Thanks, I will check this out.
  
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JasonB
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Re: Tags and serialization (save)
Reply #3 - Jul 15th, 2008 at 3:39pm
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The problem with this is I have tag values for my custom UI elements, and so the exception still occurs since it looks like SerializeTag event only fires for diagram item, right?  Looks like you are using xamlwriter for saving? Not a problem now though; I'll just temporarily remove my tags prior to save and re-add them after the save. I'd imagine there is some way to tell the xamlwriter to skip the field though.
  
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Stoyo
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Re: Tags and serialization (save)
Reply #4 - Jul 15th, 2008 at 5:07pm
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Ok, I thought you were using the DiagramItem's Tag property. So you might try to use the node adapters' tags and not your own.

Another possibility is to override the SaveToXml and LoadFromXml methods of DiagamNodeAdapter and don't rely on the XamlWriter but save just the properties you are interested in. This should help for the DeviceDiagram problem too.

We'll check if there is some attribute that would make XamlWriter skip the properties marked with the attribute.

Stoyan
  
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JasonB
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Re: Tags and serialization (save)
Reply #5 - Jul 15th, 2008 at 8:37pm
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Looks like its best just to completely override the save on the diagram and take full control of the save / load process. I won't be able to add an attribute to the tag property as I am just using the Tag property on various Controls that they inherit from FrameworkElement. Thanks for all your help.
  
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