AvalonDock: NullReferenceException when deserializring layout (V3.0.0)

[petry@datotec.com]

#44672 |

I’m getting a NullReferenceException when calling Xceed.Wpf.AvalonDock.Layout.Serialization.XmlLayoutSerializer.Deserialize in Version 3.0.0.

Here are the details of the exception:

System.NullReferenceException occurred
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=Xceed.Wpf.AvalonDock
StackTrace:
at Xceed.Wpf.AvalonDock.Controls.LayoutItem.get_View()
at Xceed.Wpf.AvalonDock.DockingManager.DetachAnchorablesSource(LayoutRoot layout, IEnumerable anchorablesSource)
at Xceed.Wpf.AvalonDock.DockingManager.OnLayoutChanged(LayoutRoot oldLayout, LayoutRoot newLayout)
at Xceed.Wpf.AvalonDock.DockingManager.OnLayoutChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
at Xceed.Wpf.AvalonDock.Layout.Serialization.XmlLayoutSerializer.Deserialize(TextReader reader)
at Datotec.Wheels4.Windows.Unity.EntityViewDataContext.OnLoadView() in C:\Projects\Wheels\Wheels4UnityWpf\Views\EntityViewDataContext.cs:line 40
at Datotec.Wheels4.Windows.Unity.EntityViewDataContext.DockingManager_Loaded(Object sender, RoutedEventArgs e) in C:\Projects\Wheels\Wheels4UnityWpf\Views\EntityViewDataContext.cs:line 30

Here is the layout, i want to deserialize:

<?xml version=”1.0″ encoding=”utf-16″?>
<LayoutRoot xmlns:xsd=”http://www.w3.org/2001/XMLSchema&#8221; xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”&gt;
<RootPanel Orientation=”Vertical”>
<LayoutPanel Orientation=”Horizontal”>
<LayoutAnchorablePane Id=”0266a91c-15e5-41e5-93a9-49ad80357475″>
<LayoutAnchorable CanHide=”False” AutoHideMinWidth=”100″ AutoHideMinHeight=”100″ Title=”Belege” IsSelected=”True” ContentId=”ValueGroup-afd181c3-15cd-4010-9e4c-669de0a4c633″ CanClose=”False” LastActivationTimeStamp=”03/20/2017 14:35:48″ />
</LayoutAnchorablePane>
<LayoutAnchorablePane FloatingWidth=”1267.33333333333″ FloatingHeight=”809.333333333333″ FloatingLeft=”1032.66666666667″ FloatingTop=”764.666666666667″>
<LayoutAnchorable CanHide=”False” AutoHideMinWidth=”100″ AutoHideMinHeight=”100″ Title=”Beträge” IsSelected=”True” ContentId=”ValueGroup-7c6b40d6-0900-400d-8741-96220d94012c” FloatingLeft=”1032.66666666667″ FloatingTop=”764.666666666667″ FloatingWidth=”1267.33333333333″ FloatingHeight=”809.333333333333″ CanClose=”False” LastActivationTimeStamp=”03/20/2017 14:35:42″ PreviousContainerId=”0266a91c-15e5-41e5-93a9-49ad80357475″ PreviousContainerIndex=”1″ />
</LayoutAnchorablePane>
</LayoutPanel>
<LayoutAnchorablePaneGroup Orientation=”Horizontal” FloatingWidth=”630.666666666667″ FloatingHeight=”809.333333333333″ FloatingLeft=”886.666666666667″ FloatingTop=”1149.33333333333″>
<LayoutAnchorablePane FloatingWidth=”630.666666666667″ FloatingHeight=”809.333333333333″ FloatingLeft=”886.666666666667″ FloatingTop=”1149.33333333333″>
<LayoutAnchorable CanHide=”False” AutoHideMinWidth=”100″ AutoHideMinHeight=”100″ Title=”Belegpositionen” IsSelected=”True” ContentId=”Relation-c1e6d297-82e0-420d-a236-c34ae77483f3″ FloatingLeft=”886.666666666667″ FloatingTop=”1149.33333333333″ FloatingWidth=”630.666666666667″ FloatingHeight=”809.333333333333″ CanClose=”False” LastActivationTimeStamp=”03/20/2017 14:35:52″ PreviousContainerId=”0266a91c-15e5-41e5-93a9-49ad80357475″ PreviousContainerIndex=”1″ />
</LayoutAnchorablePane>
</LayoutAnchorablePaneGroup>
</RootPanel>
<TopSide />
<RightSide />
<LeftSide />
<BottomSide />
<FloatingWindows />
<Hidden />
</LayoutRoot>

In Version 2.9.0 the exception does not occur.

What have changed at Xceed.Wpf.AvalonDock.Controls.LayoutItem.get_View() in version 3.0.0.
What can I do to avoid this exception?

[Fawzi [Xceed]]

#44675

Hi,

Is the issue reproducible in tha latest version of the toolkit V3.2? If yes, could you send me a simple stand alone sample project which reproduces the issue so that I could have a closer look. You man send it to: support@xceed.com

[petry@datotec.com]

#44677

I’m using the community edition and V 3.2 is not available yet. Should I try to reproduce the error with a trial version or do you want a code sample with the v 3.0 community edition?

[petry@datotec.com]

#44699

What can I do to help you solving this problem?

[Fawzi [Xceed]]

#44701

Hi,

If the issue is fixed with the puls edition of the toolkit, the only way for you to get the fix would be through upgrading to the plus edition. Otherwise we cannot do anything to fix it in the current community edition of the toolkit.

[Author]

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