我一直在通过开发应用程序来学习 .NET，今天我决定发布并测试它。
当我在 Microsoft Visual Studio 中以调试模式运行我的代码时，没有任何错误，一切都很顺利。
在已发布的应用程序中，登录后尝试转到主页时出现严重错误，但在调试时不会发生这种情况。
崩溃发生在用户按下登录按钮之后。我的代码检查一切是否正确并调用
await Shell.Current.GoToAsync($"//{nameof(MainPage)}");以下是我之后得到的错误。
System.Reflection.TargetInvocationException
Message : Exception has been thrown by the target of an invocation.
StackTrace : at Microsoft.Maui.Controls.Xaml.ApplyPropertiesVisitor.SetPropertyValue(Object xamlelement, XmlName propertyName, Object value, Object rootElement, INode node, HydrationContext context, IXmlLineInfo lineInfo)
at Microsoft.Maui.Controls.Xaml.ApplyPropertiesVisitor.Visit(ValueNode node, INode parentNode)
at Microsoft.Maui.Controls.Xaml.ValueNode.Accept(IXamlNodeVisitor visitor, INode parentNode)
at Microsoft.Maui.Controls.Xaml.ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode)
at Microsoft.Maui.Controls.Xaml.ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode)
at Microsoft.Maui.Controls.Xaml.ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode)
at Microsoft.Maui.Controls.Xaml.RootNode.Accept(IXamlNodeVisitor visitor, INode parentNode)
at Microsoft.Maui.Controls.Xaml.XamlLoader.Visit(RootNode rootnode, HydrationContext visitorContext, Boolean useDesignProperties)
at Microsoft.Maui.Controls.Xaml.XamlLoader.Load(Object view, String xaml, Assembly rootAssembly, Boolean useDesignProperties)
at Microsoft.Maui.Controls.Xaml.XamlLoader.Load(Object view, String xaml, Boolean useDesignProperties)
at Microsoft.Maui.Controls.Xaml.XamlLoader.Load(Object view, Type callingType)
at Microsoft.Maui.Controls.Xaml.Extensions.LoadFromXaml[TXaml](TXaml view, Type callingType)
at VersionControl.Views.MainPage.InitializeComponent()
at VersionControl.Views.MainPage..ctor(MainPageViewModel viewModel)
at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
at System.Reflection.ConstructorInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType)
at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
at Microsoft.Maui.MauiContext.WrappedServiceProvider.GetService(Type serviceType)
at Microsoft.Maui.Controls.ShellContent.<>c__DisplayClass19_0.<Microsoft.Maui.Controls.IShellContentController.GetOrCreateContent>b__0()
at Microsoft.Maui.Controls.ElementTemplate.CreateContent()
at Microsoft.Maui.Controls.Internals.DataTemplateExtensions.CreateContent(DataTemplate self, Object item, BindableObject container)
at Microsoft.Maui.Controls.ShellContent.Microsoft.Maui.Controls.IShellContentController.GetOrCreateContent()
at Microsoft.Maui.Controls.Handlers.ShellSectionHandler.SyncNavigationStack(Boolean animated, NavigationRequestedEventArgs e)
at Microsoft.Maui.Controls.Handlers.ShellSectionHandler.MapCurrentItem(ShellSectionHandler handler, ShellSection item)
at Microsoft.Maui.PropertyMapper`2.<>c__DisplayClass5_0.<Add>b__0(IElementHandler h, IElement v)
at Microsoft.Maui.PropertyMapper.UpdatePropertyCore(String key, IElementHandler viewHandler, IElement virtualView)
at Microsoft.Maui.PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView)
at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view)
at Microsoft.Maui.Controls.Handlers.ShellSectionHandler.SetVirtualView(IElement view)
at Microsoft.Maui.Controls.Handlers.ShellItemHandler.UpdateCurrentItem()
at Microsoft.Maui.Controls.Handlers.ShellItemHandler.MapCurrentItem(ShellItemHandler handler, ShellItem item)
at Microsoft.Maui.PropertyMapper`2.<>c__DisplayClass5_0.<Add>b__0(IElementHandler h, IElement v)
at Microsoft.Maui.PropertyMapper.UpdatePropertyCore(String key, IElementHandler viewHandler, IElement virtualView)
at Microsoft.Maui.PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView)
at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view)
at Microsoft.Maui.Controls.Handlers.ShellItemHandler.SetVirtualView(IElement view)
at Microsoft.Maui.Controls.Platform.ShellView.CreateShellItemView()
at Microsoft.Maui.Controls.Platform.ShellView.SwitchShellItem(ShellItem newItem, Boolean animate)
at Microsoft.Maui.Controls.Handlers.ShellHandler.MapCurrentItem(ShellHandler handler, Shell view)
at Microsoft.Maui.PropertyMapper`2.<>c__DisplayClass5_0.<Add>b__0(IElementHandler h, IElement v)
at Microsoft.Maui.PropertyMapper.UpdatePropertyCore(String key, IElementHandler viewHandler, IElement virtualView)
at Microsoft.Maui.PropertyMapper.UpdateProperty(IElementHandler viewHandler, IElement virtualView, String property)
at Microsoft.Maui.Handlers.ElementHandler.UpdateValue(String property)
at Microsoft.Maui.Controls.Element.OnPropertyChanged(String propertyName)
at Microsoft.Maui.Controls.Shell.OnPropertyChanged(String propertyName)
at Microsoft.Maui.Controls.BindableObject.SetValueActual(BindableProperty property, BindablePropertyContext context, Object value, Boolean currentlyApplying, SetValueFlags attributes, Boolean silent)
at Microsoft.Maui.Controls.BindableObject.SetValueCore(BindableProperty property, Object value, SetValueFlags attributes, SetValuePrivateFlags privateAttributes)
at Microsoft.Maui.Controls.ShellNavigationManager.GoToAsync(ShellNavigationParameters shellNavigationParameters, ShellNavigationRequest navigationRequest)
at VersionControl.ViewModels.LoadingViewModel.PressMe()
System.NullReferenceException
Message : Object reference not set to an instance of an object.
StackTrace : at Syncfusion.Maui.ListView.SfListView.SetUpKeyListenerRequirements()
at Syncfusion.Maui.ListView.SfListView.RaiseListViewLoaded(ListViewLoadedEventArgs e)
at Syncfusion.Maui.ListView.SfListView.ArrangeContent(Rect bounds)
at Syncfusion.Maui.Core.SfView.set_Padding(Thickness value)
at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
几次尝试后，我注意到如果我删除我的 Syncfusion List 和 Grid 页面加载，那么问题一定在那里。
但是，我仍然不明白为什么它在调试模式下工作，而不是在已发布的应用程序中工作。
下面是我的 xaml 代码的一部分，来自主页。如果我运行这个位，它会因为 SfList 而中断。
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:viewModels="clr-namespace:VersionControl.ViewModels"
xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"
x:Class="VersionControl.Views.MainPage"
xmlns:syncfusionList="clr-namespace:Syncfusion.Maui.ListView;assembly=Syncfusion.Maui.ListView"
xmlns:syncfusionGrid="clr-namespace:Syncfusion.Maui.DataGrid;assembly=Syncfusion.Maui.DataGrid"
xmlns:core="clr-namespace:Syncfusion.Maui.Core;assembly=Syncfusion.Maui.Core"
BackgroundColor="#212121">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="80" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="300" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<!-- First Collumn -->
<Grid Grid.Column="0" Grid.RowSpan="2">
<Image Source="folder_icon.png" HeightRequest="20" HorizontalOptions="Start" VerticalOptions="Start" Margin="20,45,0,0"></Image>
<Button Text="{Binding FolderName}" Command="{Binding FolderCommand}"
ToolTipProperties.Text="Click to open Windows Explorer to the default location for your projects."
BackgroundColor="#212121" BorderColor="#212121" Padding="0" TextColor="LightGrey" FontSize="Subtitle" Margin="50,40,0,0"
MinimumHeightRequest="1" WidthRequest="120" HorizontalOptions="Start" VerticalOptions="Start" CornerRadius="4">
<VisualStateManager.VisualStateGroups>
<VisualStateGroupList>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="PointerOver">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="DimGrey" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateGroupList>
</VisualStateManager.VisualStateGroups>
</Button>
<Button Text="+New" Command="{Binding AddSubFolderCommand}" BackgroundColor="#212121" BorderColor="#212121" Padding="0"
TextColor="LightGrey" FontSize="Body" Margin="245,45,0,0" MinimumHeightRequest="1" WidthRequest="50" CornerRadius="4"
HorizontalOptions="Start" VerticalOptions="Start"
ToolTipProperties.Text="Create a new project and folder at the same time.">
<VisualStateManager.VisualStateGroups>
<VisualStateGroupList>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="PointerOver">
<VisualState.Setters>
<Setter Property="BackgroundColor" Value="DimGrey" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateGroupList>
</VisualStateManager.VisualStateGroups>
</Button>
<syncfusionList:SfListView x:Name="listView" Padding="10" AutoFitMode="Height" ItemSpacing="10,5,0,0" Margin="10,100,0,0"
ItemsSource="{Binding Projects}" SelectionMode="Single" SelectedItem="{Binding SelectedProject}"
SelectionBackground="DimGray" SelectionChangedCommand="{Binding SelectedProjectSyncCommand}">
<syncfusionList:SfListView.ItemTemplate>
<DataTemplate>
<Grid>
<Image Source="folder2.png" HeightRequest="20" HorizontalOptions="Start" IsVisible="{Binding OnlyLocalProjectFolder}"></Image>
<Image Source="cloud2.png" HeightRequest="20" HorizontalOptions="Start" IsVisible="{Binding OnlyS3ProjectFolder}" Margin="0,0,0,0"></Image>
<Image Source="foldercloud.png" HeightRequest="20" HorizontalOptions="Start" IsVisible="{Binding LocalAndS3ProjectFolder}"></Image>
<Label Text="{Binding Name}" FontSize="13" TextColor="LightGrey" Margin="30,0,0,0" VerticalOptions="Center"/>
<Image Source="correct.png" IsVisible="false" HeightRequest="12" HorizontalOptions="End" Margin="0,0,20,0">
<Image.Triggers>
<MultiTrigger TargetType="Image">
<MultiTrigger.Conditions>
<BindingCondition Binding="{Binding UpToDateLocal}" Value="true" />
<BindingCondition Binding="{Binding UpToDateS3}" Value="true" />
</MultiTrigger.Conditions>
<Setter Property="IsVisible" Value="true" />
</MultiTrigger>
</Image.Triggers>
</Image>
<VisualStateManager.VisualStateGroups>
<VisualStateGroupList>
<VisualStateGroup>
<VisualState x:Name="PointerOver">
<VisualState.Setters>
<Setter Property="Background" Value="DimGray"/>
</VisualState.Setters>
</VisualState>
<VisualState x:Name="Normal"/>
</VisualStateGroup>
</VisualStateGroupList>
</VisualStateManager.VisualStateGroups>
</Grid>
</DataTemplate>
</syncfusionList:SfListView.ItemTemplate>
</syncfusionList:SfListView>
</Grid>
你能帮忙理解哪里出了问题吗？