CheckComboBox 无法同时设置 DisplayMemberPath 和 ItemTemplate

[CodingOctocat]

Describe the bug

CheckComboBox 无法同时设置 DisplayMemberPath 和 ItemTemplate，设计时错误，运行时也错误，但是如果这个 CheckComboBox 作为 DataGridTemplateColumn 的 CellTemplate，那么又没问题。

Timestamp: 2026/3/15 星期日 上午 11:40:59
OSVersion: Microsoft Windows NT 10.0.26200.0
ClrVersion: 10.0.3
ThreadName: N/A(2)
----------------------------------------
Handler: DispatcherUnhandledException
----------------------------------------
Type: System.Windows.Markup.XamlParseException
Source: PresentationFramework
Message: “设置属性“System.Windows.Controls.ItemsControl.ItemTemplate”时引发了异常。”，行号为“246”，行位置为“43”。
TargetSite: Void RewrapException(System.Exception, System.Xaml.IXamlLineInfo, System.Uri)
StackTrace:
   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)
   at System.Reflection.MethodBaseInvoker.InvokeWithFewArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   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.VisitDisposeCache(ServiceCallSite transientCallSite, 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.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass2_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(ServiceIdentifier serviceIdentifier, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at CommunityToolkit.Mvvm.Input.RelayCommand.Execute(Object parameter)
   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)
HResult: -2146233087
HelpLink: null

--- Inner Exception (Level 1) ---
Type: System.InvalidOperationException
Source: PresentationFramework
Message: 无法同时设置 DisplayMemberPath 和 ItemTemplate。
TargetSite: Void CheckTemplateSource()
StackTrace:
   at System.Windows.Controls.ItemsControl.CheckTemplateSource()
   at System.Windows.Controls.ItemsControl.OnItemTemplateChanged(DataTemplate oldItemTemplate, DataTemplate newItemTemplate)
   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 MS.Internal.Xaml.Runtime.ClrObjectRuntime.SetValue(Object inst, XamlMember property, Object value)
HResult: -2146233079
HelpLink: null
InnerException: null

Steps to reproduce the bug

1. 添加 CheckComboBox 并同时设置 DisplayMemberPath 和 ItemTemplate
2. 运行程序 -> 异常
3. 将 CheckBomboBox 移动到 DataGridTemplateColumn 的 CellTemplate 再次运行 -> 正常

Expected behavior

No response

Screenshots

No response

NuGet package version

HandyControls (Custom version) 3.6.0

IDE

Visual Studio 2026

Framework type

.Net 10.0

Windows version

Windows 11

Additional context

No response