Loading load Xceed layouts

[tchrobocek]

Hello,

Recently we migrated from Xceed AvalonDock 3.1 and we have some problems with mapping to abstract classes during deserialization of XML. Is there a way to migrate those?

Here is a stack trace

System.InvalidOperationException: There is an error in XML document (32, 6). ---> System.InvalidOperationException: There is an error in XML document (32, 6). ---> System.InvalidOperationException: Instances of abstract classes cannot be created.

at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderLayoutFloatingWindow.Read1_LayoutFloatingWindow()

--- End of inner exception stack trace ---

at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)

at Xceed.Wpf.AvalonDock.Layout.LayoutRoot.ReadElement(XmlReader reader)

at Xceed.Wpf.AvalonDock.Layout.LayoutRoot.ReadElementList(XmlReader reader, Boolean isFloatingWindow)

at Xceed.Wpf.AvalonDock.Layout.LayoutRoot.ReadXml(XmlReader reader)

at System.Xml.Serialization.XmlSerializationReader.ReadSerializable(IXmlSerializable serializable, Boolean wrappedAny)

at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderLayoutRoot.Read1_LayoutRoot()

--- End of inner exception stack trace ---

at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)

at System.Xml.Serialization.XmlSerializer.Deserialize(TextReader textReader)

at Xceed.Wpf.AvalonDock.Layout.Serialization.XmlLayoutSerializer.Deserialize(TextReader reader)

at Xceed.Wpf.AvalonDock.Layout.Serialization.XmlLayoutSerializer.Deserialize(String filepath)

at BroStudio.MainWindow.LoadLayout(Layout layout) in C:\Users\ted.pelikan\git\BroStudio\BroStudio\MainWindow.xaml.cs:line 72

at BroStudio.MainWindow.ApplicationLayouts_OnClick(Object sender, RoutedEventArgs e) in C:\Users\ted.pelikan\git\BroStudio\BroStudio\MainWindow.xaml.cs:line 91

at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)

at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)

at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)

at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)

at System.Windows.Controls.MenuItem.InvokeClickAfterRender(Object arg)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

[Dirkster99]

Hi,

I am surprised there is a problem that would require a migration. Currently, there is no migration because there are no big changes - other than the fixes listed in the Readme.md and there is no breaking change I am aware of.

For the Stacktrace above it would be best if you could find a reference case using a test/demo program in this repository (start MLibTest, exit program, restart program should restore layout).

Otherwise, I am not sure what we could possibly do with your stacktrace :-( it might even be possible that you could generate the same stacktrace migrating to xceed version 3.6 (which is very similar plus fixes and additional features).

[tchrobocek]

I just found that it's probably the same issue as #59

Weird thing is sometimes I get exception as above; e.g. "cannot deserialize abstract classes" and sometimes "Collection was modified; enumeration operation may not execute.".

For now I resolved the issue with downgrade to 3.5.4.1. But the 3.5.5 and newer does not work.

[Dirkster99]

@tchrobocek Would you be able to review the actual change and maybe come up with resolution? I cannot verify this issue or Issue #59 which makes it next to impossible for me to fix this.

I am also wondering if there is something specific to the controls you are using(?).
I can imagine that one of your controls might (by accident) block the UI thread and so things might get out of sync(?). Can you retest your layout but just load a dummy TextBlock or such instate of the actual controls?

Otherwise, I have no idea what to do with this or Issue #59