Null reference exception when using AcrylicWindow from Excel VSTO Addin

[mihaicupsuite]

The offending code:

public static ImageSource AppIcon{ get{ if (appIcon == null){ var path = System.Reflection.Assembly.GetEntryAssembly().Location;

Problem is that for this type of application the EntryAssembly is null.

[mihaicupsuite]

The following code seems to work ok as fallback in my case, but might not be the desired outcome for everybody.

public static ImageSource AppIcon { get { if (appIcon == null) { var assembly = System.Reflection.Assembly.GetEntryAssembly(); if (assembly == null) assembly = System.Reflection.Assembly.GetCallingAssembly(); var path = assembly.Location; appIcon = GetIcon(path); } return appIcon; } protected set { appIcon = value; } }

[svr333]

I have come to experience the same issue, more or less;

After updating from 0.6.1 to 0.9.0 (using 0.9.0 so AcrylicWindow works on Windows 11), I get a NullReferenceException.

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at SourceChord.FluentWPF.Utility.IconHelper.get_AppIcon()

This is the part of the stacktrace Im focusing on. I'll look for a workaround for the moment but it would be useful if I knew why this issue started occurring after updating

Full Stacktrace

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
   at object RuntimeMethodHandle.InvokeMethod(object target, object[] arguments, Signature sig, bool constructor)
   at object System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(object obj, object[] parameters, object[] arguments)
   at object System.Reflection.RuntimeMethodInfo.Invoke(object obj, BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)
   at object System.Reflection.RuntimePropertyInfo.GetValue(object obj, object[] index)
   at bool System.Windows.Markup.StaticExtension.GetFieldOrPropertyValue(Type type, string name, out object value)
   at object System.Windows.Markup.StaticExtension.ProvideValue(IServiceProvider serviceProvider)
   at object MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me, IServiceProvider serviceProvider)
   at bool System.Xaml.XamlObjectWriter.Logic_ProvideValue(ObjectWriterContext ctx)
   at void System.Xaml.XamlObjectWriter.Logic_AssignProvidedValue(ObjectWriterContext ctx)
   at void System.Xaml.XamlObjectWriter.WriteEndMember()
   at void System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReader templateReader, XamlObjectWriter currentWriter)
   at void System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlObjectWriter objectWriter)
   at DependencyObject System.Windows.FrameworkTemplate.LoadOptimizedTemplateContent(DependencyObject container, IComponentConnector componentConnector, IStyleConnector styleConnector, List<DependencyObject> affectedChildren, UncommonField<Hashtable> templatedNonFeChildrenField)
   at DependencyObject System.Windows.FrameworkTemplate.LoadContent(DependencyObject container, List<DependencyObject> affectedChildren)
   at bool System.Windows.StyleHelper.ApplyTemplateContent(UncommonField<HybridDictionary[]> dataField, DependencyObject container, FrameworkElementFactory templateRoot, int lastChildIndex, HybridDictionary childIndexFromChildID, FrameworkTemplate frameworkTemplate)
   at bool System.Windows.FrameworkTemplate.ApplyTemplateContent(UncommonField<HybridDictionary[]> templateDataField, FrameworkElement container)
   at bool System.Windows.FrameworkElement.ApplyTemplate()
   at Size System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at void System.Windows.UIElement.Measure(Size availableSize)
   at void System.Windows.Interop.HwndSource.SetLayoutSize()
   at void System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
   at void System.Windows.Window.SetRootVisual()
   at void System.Windows.Window.SetRootVisualAndUpdateSTC()
   at void System.Windows.Window.SafeCreateWindowDuringShow()
   at object System.Windows.Window.ShowHelper(object booleanBox)
   at void AudioBand.UI.SettingsWindow.SettingsWindowMessageHandler(SettingsWindowMessage msg) in C:/Users/vanro/Documents/Programming/cs/audio-band/src/AudioBand/UI/Toolbar/SettingsWindow.xaml.cs:line 97
   at void AudioBand.Messages.MessageBus.Publish<TMessage>(TMessage message, string caller) in C:/Users/vanro/Documents/Programming/cs/audio-band/src/AudioBand/Messages/MessageBus.cs:line 56
   at void MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, bool userInitiated)
   at object System.Windows.Controls.MenuItem.InvokeClickAfterRender(object arg)
   at object System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, object args, int numArgs)
   at object System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, Delegate callback, object args, int numArgs, Delegate catchHandler)
   at void System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at void MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, object state)
   at void System.Windows.Threading.DispatcherOperation.Invoke()
   at void System.Windows.Threading.Dispatcher.ProcessQueue()
   at IntPtr System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
   at IntPtr MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
   at object MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o)
   at object System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, object args, int numArgs)
   at object System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, Delegate callback, object args, int numArgs, Delegate catchHandler)
   at object System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, object args, int numArgs)
   at IntPtr MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam) ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at ImageSource SourceChord.FluentWPF.Utility.IconHelper.get_AppIcon()
   --- End of inner exception stack trace ---
---END OF EXCEPTION---
---ORIGINAL EXCEPTION---
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at SourceChord.FluentWPF.Utility.IconHelper.get_AppIcon()
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index)
   at System.Windows.Markup.StaticExtension.GetFieldOrPropertyValue(Type type, String name, Object& value)
   at System.Windows.Markup.StaticExtension.ProvideValue(IServiceProvider serviceProvider)
   at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me, IServiceProvider serviceProvider)
   at System.Xaml.XamlObjectWriter.Logic_ProvideValue(ObjectWriterContext ctx)
   at System.Xaml.XamlObjectWriter.Logic_AssignProvidedValue(ObjectWriterContext ctx)
   at System.Xaml.XamlObjectWriter.WriteEndMember()
   at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReader templateReader, XamlObjectWriter currentWriter)
   at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlObjectWriter objectWriter)
   at System.Windows.FrameworkTemplate.LoadOptimizedTemplateContent(DependencyObject container, IComponentConnector componentConnector, IStyleConnector styleConnector, List`1 affectedChildren, UncommonField`1 templatedNonFeChildrenField)
   at System.Windows.FrameworkTemplate.LoadContent(DependencyObject container, List`1 affectedChildren)
   at System.Windows.StyleHelper.ApplyTemplateContent(UncommonField`1 dataField, DependencyObject container, FrameworkElementFactory templateRoot, Int32 lastChildIndex, HybridDictionary childIndexFromChildID, FrameworkTemplate frameworkTemplate)
   at System.Windows.FrameworkTemplate.ApplyTemplateContent(UncommonField`1 templateDataField, FrameworkElement container)
   at System.Windows.FrameworkElement.ApplyTemplate()
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Interop.HwndSource.SetLayoutSize()
   at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
   at System.Windows.Window.SetRootVisual()
   at System.Windows.Window.SetRootVisualAndUpdateSTC()
   at System.Windows.Window.SafeCreateWindowDuringShow()
   at System.Windows.Window.ShowHelper(Object booleanBox)
   at AudioBand.UI.SettingsWindow.SettingsWindowMessageHandler(SettingsWindowMessage msg) in C:\Users\vanro\Documents\Programming\cs\audio-band\src\AudioBand\UI\Toolbar\SettingsWindow.xaml.cs:line 97
   at AudioBand.Messages.MessageBus.Publish[TMessage](TMessage message, String caller) in C:\Users\vanro\Documents\Programming\cs\audio-band\src\AudioBand\Messages\MessageBus.cs:line 56
   at MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
   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)
   at System.Windows.Threading.DispatcherOperation.InvokeImpl()
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   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)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
---END OF ORIGINAL EXCEPTION```