dotnet
Calling a wpf lib with reflection raised TargetInvocationException
Description
.NET8 visual studio 2022
Reproduction Steps
- Create a wpf custom control lib or user control lib
- Add nuget Microsoft.Xaml.Behaviors or any nuget which can be referenced at xaml else
- Add a page or control as below
<Page
x:Class="View"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:behaviors="http://schemas.microsoft.com/xaml/behaviors"
d:DesignHeight="450"
d:DesignWidth="800"
mc:Ignorable="d">
<Grid>
<TreeView ItemsSource="{Binding ElementsView}">
<behaviors:Interaction.Triggers>
<behaviors:EventTrigger EventName="SelectionChanged">
<behaviors:InvokeCommandAction Command="{Binding LoadElementDetailCommand}" />
</behaviors:EventTrigger>
<behaviors:EventTrigger EventName="TreeViewItem.Expanded">
<behaviors:InvokeCommandAction Command="{Binding LoadChildrenCommand}"/>
</behaviors:EventTrigger>
</behaviors:Interaction.Triggers>
</TreeView>
</Grid>
</Page>
- Compile project with output View.dll
- Assembly.LoadFrom("View.dll") and create instance of “View” in a Console project.
- Run or debug Console project
- Raise exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Windows.Markup.XamlParseException: Could not load file or assembly 'Microsoft.Xaml.Behaviors, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. 系统找不到指定的文件。 ---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Xaml.Behaviors, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. 系统找不到指定的文件。 File name: 'Microsoft.Xaml.Behaviors, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' at System.Reflection.RuntimeAssembly.InternalLoad(AssemblyName assemblyName, StackCrawlMark& stackMark, AssemblyLoadContext assemblyLoadContext, RuntimeAssembly requestingAssembly, Boolean throwOnFileNotFound) at System.Reflection.Assembly.Load(AssemblyName assemblyRef) at System.Windows.Baml2006.Baml2006SchemaContext.ResolveAssembly(BamlAssembly bamlAssembly) at System.Windows.Baml2006.Baml2006SchemaContext.ResolveBamlTypeToType(BamlType bamlType) at System.Windows.Baml2006.Baml2006SchemaContext.ResolveBamlType(BamlType bamlType, Int16 typeId) at System.Windows.Baml2006.Baml2006SchemaContext.GetXamlType(Int16 typeId) at System.Windows.Baml2006.Baml2006SchemaContext.GetProperty(Int16 propertyId, XamlType parentType) at System.Windows.Baml2006.Baml2006Reader.Process_PropertyArrayStart() at System.Windows.Baml2006.Baml2006Reader.Process_OneBamlRecord() at System.Windows.Baml2006.Baml2006Reader.Process_BamlRecords() at System.Windows.Baml2006.Baml2006Reader.Read() at System.Windows.Markup.WpfXamlLoader.TransformNodes(XamlReader xamlReader, XamlObjectWriter xamlWriter, Boolean onlyLoadOneNode, Boolean skipJournaledProperties, Boolean shouldPassLineNumberInfo, IXamlLineInfo xamlLineInfo, IXamlLineInfoConsumer xamlLineInfoConsumer, XamlContextStack`1 stack, IStyleConnector styleConnector) at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) --- End of inner exception stack trace --- at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri) at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri) at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream) at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
source: https://github.com/dotnet/wpf/blob/148547d6d5956fca930028582ddc8bbe2058bfe9/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Markup/Baml2006/Baml2006SchemaContext.cs#L24
Expected behavior
Run without exceptions
Actual behavior
Throw TargetInvocationException
Regression?
No response
Known Workarounds
Adding a usage of Microsoft.Xaml.Behaviors in csharp code can avoid this issue.
using Microsoft.Xaml.Behaviors.Core;
namespace View
{
public class HostedService : IAppHostedService
{
public HostedServicer()
{
// Any reference of Microsoft.Xaml.Behaviors will work
ConditionBehavior conditionBehavior = new ConditionBehavior();
}
}
}
It seems that there are some differences between the mechanism of baml assembly loading and csharp
Impact
No response
Configuration
No response
Other information
No response
please provide a repro project
https://github.com/NeverMorewd/Lemon.Automation
- gitclone
- build solution
- the launchsettings of Lemon.Automation.App should be noticed : "-a AppUITracker AppUIProvider -b false"
- run with/without debug Lemon.Automation.App
- everything will go well
However
- Locate to line 27 of https://github.com/NeverMorewd/Lemon.Automation/blob/main/src/Lemon.Automation.App.UITracker/HostedService.cs
- delete this line.
- rebuild Lemon.Automation.App.UITracker
- run with/without debug Lemon.Automation.App you will get this issue.
@NeverMorewd Your reproduction project seems to be missing. I think I know where the issue might be as I've dealt with very similar stacktrace previously on NetFX, but without repro it's impossible for me to compare.
@NeverMorewd Your reproduction project seems to be missing. I think I know where the issue might be as I've dealt with very similar stacktrace previously on NetFX, but without repro it's impossible for me to compare.
I have set this repo to be public