C# 组合框选择问题

当我试图在基于WPF的应用程序中更改组合框的选择时，我遇到了以下随机崩溃

如果有人有任何想法，请回复我

另请参见：

但我没有找到任何解决办法或出路。谢谢

XAML代码：

 <telerik:GridViewDataColumn
                                            DataMemberBinding="{Binding OriginItem.CompleteName}"
                                            Header="Portion"
                                            IsReadOnly="False">
                                            <telerik:GridViewDataColumn.CellEditTemplate>
                                                <DataTemplate>
                                                    <ComboBox
                                                        DisplayMemberPath="CompleteName"
                                                        ItemsSource="{Binding ExtrasDistributionViewModel.CalculationViewModel.SettingsViewModel.OriginItemViewModels}"
                                                        SelectedItem="{Binding OriginItem, Mode=TwoWay}" />
                                                </DataTemplate>
                                            </telerik:GridViewDataColumn.CellEditTemplate>

Message: Object reference not set to an instance of an object.
Stacktrace:
   at System.Windows.Controls.ComboBox.CoerceIsSelectionBoxHighlighted(Object o, Object value)
   at System.Windows.DependencyObject.ProcessCoerceValue(DependencyProperty dp, PropertyMetadata metadata, EntryIndex& entryIndex, Int32& targetIndex, EffectiveValueEntry& newEntry, EffectiveValueEntry& oldEntry, Object& oldValue, Object baseValue, Object controlValue, CoerceValueCallback coerceValueCallback, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, Boolean skipBaseValueChecks)
   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.CoerceValue(DependencyProperty dp)
   at System.Windows.Controls.ComboBox.OnIsDropDownOpenChanged(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 System.Windows.Controls.ComboBox.set_IsDropDownOpen(Boolean value)
   at Andritz.PreCalc.App.AppBootstrapper.TextBox_GotFocus(Object sender, RoutedEventArgs e) in E:\Andritz\Precalc\Phase2-Austria\precalc\Andritz.PreCalc\Andritz.PreCalc.App\AppBootstrapper.cs:line 661
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
   at System.Windows.FrameworkElement.OnGotFocus(RoutedEventArgs e)
   at System.Windows.UIElement.IsFocused_Changed(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(DependencyPropertyKey key, Object value)
   at System.Windows.Input.FocusManager.OnFocusedElementChanged(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.Input.FocusManager.SetFocusedElement(DependencyObject element, IInputElement value)
   at System.Windows.UIElement.Focus()
   at System.Windows.Controls.ListBoxItem.OnVisualParentChanged(DependencyObject oldParent)
   at System.Windows.Media.Visual.FireOnVisualParentChanged(DependencyObject oldParent)
   at System.Windows.Media.Visual.RemoveVisualChild(Visual child)
   at System.Windows.Media.VisualCollection.DisconnectChild(Int32 index)
   at System.Windows.Media.VisualCollection.Clear()
   at System.Windows.Controls.UIElementCollection.ClearInternal()
   at System.Windows.Controls.Panel.ClearChildren()
   at System.Windows.Controls.Panel.EnsureEmptyChildren(FrameworkElement logicalParent)
   at System.Windows.Controls.Panel.OnItemsChangedInternal(Object sender, ItemsChangedEventArgs args)
   at System.Windows.Controls.Panel.OnItemsChanged(Object sender, ItemsChangedEventArgs args)
   at System.Windows.Controls.ItemContainerGenerator.OnRefresh()
   at System.Windows.Controls.ItemContainerGenerator.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
   at System.Windows.WeakEventManager.ListenerList`1.DeliverEvent(Object sender, EventArgs e, Type managerType)
   at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
   at System.Collections.Specialized.CollectionChangedEventManager.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
   at System.Windows.Controls.ItemCollection.SetCollectionView(CollectionView view)
   at System.Windows.Controls.ItemCollection.SetItemsSource(IEnumerable value, Func`2 GetSourceItem)
   at System.Windows.Controls.ItemsControl.OnItemsSourceChanged(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.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
   at System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
   at System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
   at System.Windows.Data.BindingExpression.Activate(Object item)
   at System.Windows.Data.BindingExpression.OnDataContextChanged(DependencyObject contextElement)
   at System.Windows.Data.BindingExpression.HandlePropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.Data.BindingExpressionBase.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.Data.BindingExpression.OnPropertyInvalidation(DependencyObject d, DependencyPropertyChangedEventArgs args)
   at System.Windows.DependentList.InvalidateDependents(DependencyObject source, DependencyPropertyChangedEventArgs sourceArgs)
   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.TreeWalkHelper.InvalidateTreeDependentProperty(TreeChangeInfo info, DependencyObject d, FrameworkObject& fo, DependencyProperty dp, FrameworkPropertyMetadata fMetadata, Style selfStyle, Style selfThemeStyle, ChildRecord& childRecord, Boolean isChildRecordValid, Boolean hasStyleChanged, Boolean isSelfInheritanceParent)
   at System.Windows.TreeWalkHelper.InvalidateTreeDependentProperties(TreeChangeInfo info, FrameworkElement fe, FrameworkContentElement fce, Style selfStyle, Style selfThemeStyle, ChildRecord& childRecord, Boolean isChildRecordValid, Boolean hasStyleChanged, Boolean isSelfInheritanceParent)
   at System.Windows.FrameworkElement.InvalidateTreeDependentProperties(TreeChangeInfo parentTreeState, Boolean isSelfInheritanceParent)
   at System.Windows.FrameworkElement.OnAncestorChangedInternal(TreeChangeInfo parentTreeState)
   at System.Windows.TreeWalkHelper.OnAncestorChanged(DependencyObject d, TreeChangeInfo info, Boolean visitedViaVisualTree)
   at System.Windows.DescendentsWalker`1.StartWalk(DependencyObject startNode, Boolean skipStartNode)
   at MS.Internal.PrePostDescendentsWalker`1.StartWalk(DependencyObject startNode, Boolean skipStartNode)
   at System.Windows.TreeWalkHelper.InvalidateOnTreeChange(FrameworkElement fe, FrameworkContentElement fce, DependencyObject parent, Boolean isAddOperation)
   at System.Windows.FrameworkElement.OnVisualParentChanged(DependencyObject oldParent)
   at System.Windows.Media.Visual.FireOnVisualParentChanged(DependencyObject oldParent)
   at System.Windows.Media.Visual.RemoveVisualChild(Visual child)
   at System.Windows.FrameworkElement.set_TemplateChild(UIElement value)
   at System.Windows.StyleHelper.ClearGeneratedSubTree(HybridDictionary[] instanceData, FrameworkElement feContainer, FrameworkContentElement fceContainer, FrameworkTemplate oldFrameworkTemplate)
   at System.Windows.StyleHelper.DoTemplateInvalidations(FrameworkElement feContainer, FrameworkTemplate oldFrameworkTemplate)
   at System.Windows.Controls.ContentPresenter.OnTemplateChanged(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.Controls.ContentPresenter.OnContentChanged(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.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
   at System.Windows.StyleHelper.InvalidateDependents(Style ownerStyle, FrameworkTemplate frameworkTemplate, DependencyObject container, DependencyProperty dp, FrugalStructList`1& dependents, Boolean invalidateOnlyContainer)
   at System.Windows.StyleHelper.OnTriggerSourcePropertyInvalidated(Style ownerStyle, FrameworkTemplate frameworkTemplate, DependencyObject container, DependencyProperty dp, DependencyPropertyChangedEventArgs changedArgs, Boolean invalidateOnlyContainer, FrugalStructList`1& triggerSourceRecordFromChildIndex, FrugalMap& propertyTriggersWithActions, Int32 sourceChildIndex)
   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 Telerik.Windows.Controls.GridView.GridViewCell.ResetEditor()
   at Telerik.Windows.Controls.GridView.GridViewCell.RaiseCellEditEndedEvent(GridViewEditAction editAction)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.PerformCellEditEnded(GridViewCell currentCell)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.CommitCellEdit(GridViewCell currentCell, Boolean isLeavingRow)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.CommitEdit()
   at Telerik.Windows.Controls.GridView.GridViewDataControl.EndEditAccordingToLostFocusAction()
   at Telerik.Windows.Controls.GridView.GridViewCell.HandlePendingEdit(UIElement focusedElement)
   at Telerik.Windows.Controls.GridView.GridViewCell.HandlePendingEditOnLostFocus()
   at Telerik.Windows.Controls.GridView.GridViewCell.OnEditorLostFocus(Object sender, RoutedEventArgs e)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
   at System.Windows.UIElement.OnLostFocus(RoutedEventArgs e)
   at System.Windows.UIElement.IsFocused_Changed(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.ClearValueCommon(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata)
   at System.Windows.DependencyObject.ClearValue(DependencyPropertyKey key)
   at System.Windows.Input.FocusManager.OnFocusedElementChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at Andritz.Core.Controls.AGRibbonWindow.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.Input.FocusManager.SetFocusedElement(DependencyObject element, IInputElement value)
   at System.Windows.Input.FocusManager.GetFocusedElement(DependencyObject element, Boolean validate)
   at System.Windows.FrameworkElement.OnPreviewGotKeyboardFocus(Object sender, KeyboardFocusChangedEventArgs e)
   at System.Windows.Input.KeyboardFocusChangedEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.KeyboardDevice.TryChangeFocus(DependencyObject newFocus, IKeyboardInputProvider keyboardInputProvider, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)
   at System.Windows.Input.KeyboardDevice.Focus(DependencyObject focus, Boolean askOld, Boolean askNew, Boolean forceToNullIfFailed)
   at System.Windows.Input.KeyboardDevice.ReevaluateFocusCallback(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)

消息：对象引用未设置为对象的实例。
堆栈跟踪：
在System.Windows.Controls.ComboBox.ImpressionSelectionBoxHighlighted处（对象o，对象值）
位于System.Windows.DependencyObject.ProcessImpresseValue（DependencyProperty dp、PropertyMetadata、EntryIndex和EntryIndex、Int32和targetIndex、EffectiveValueEntry和newEntry、EffectiveValueEntry和oldEntry、Object和oldValue、Object baseValue、Object controlValue、强制ValueCallback强制ValueCallback、布尔强制WithDeferredReference、布尔强制WithCurrentValue、布尔skipBaseValueChecks）
在System.Windows.DependencyObject.UpdateEffectiveValue（EntryIndex EntryIndex，DependencyProperty dp，PropertyMetadata，EffectiveValueEntry oldEntry，EffectiveValueEntry&newEntry，布尔强制WithDeferredReference，布尔强制WithCurrentValue，OperationType OperationType）
位于System.Windows.DependencyObject.ImpresseValue（DependencyProperty dp）
在System.Windows.Controls.ComboBox.OnIsDropDownOpenChanged（DependencyObject d，DependencyPropertyChangedEventArgs e）
位于System.Windows.DependencyObject.OnPropertyChanged（DependencyPropertyChangedEventArgs e）
位于System.Windows.FrameworkElement.OnPropertyChanged（DependencyPropertyChangedEventArgs e）
位于System.Windows.DependencyObject.NotifyPropertyChange（DependencyPropertyChangedEventArgs参数）
在System.Windows.DependencyObject.UpdateEffectiveValue（EntryIndex EntryIndex，DependencyProperty dp，PropertyMetadata，EffectiveValueEntry oldEntry，EffectiveValueEntry&newEntry，布尔强制WithDeferredReference，布尔强制WithCurrentValue，OperationType OperationType）
位于System.Windows.DependencyObject.SetValueCommon（DependencyProperty dp、对象值、PropertyMetadata元数据、布尔强制WithDeferredReference、布尔强制WithCurrentValue、OperationType OperationType、布尔isInternal）
位于System.Windows.DependencyObject.SetValue（DependencyProperty dp，对象值）
位于System.Windows.Controls.ComboBox.set_IsDropDownOpen（布尔值）
位于e:\Andritz\PreCalc\Phase2 Austria\PreCalc\Andritz.PreCalc\Andritz.PreCalc.App\AppBootstrapper.cs中的Andritz.PreCalc.App.AppBootstrapper.TextBox\u GotFocus（对象发送方，RoutedEventArgs e）：第661行
位于System.Windows.RoutedEventHandlerInfo.InvokeHandler（对象目标，RoutedEventTargets RoutedEventTargets）
在System.Windows.EventRoute.InvokeHandlersImpl（对象源，RoutedEventArgs参数，布尔值重新调高）
位于System.Windows.UIElement.RaiseEventImpl（DependencyObject发送方，RoutedEventTargets参数）
在System.Windows.UIElement.RaiseEvent（RoutedEventArgs e）处
位于System.Windows.FrameworkElement.OnGotFocus（RoutedEventArgs e）
在System.Windows.UIElement.IsFocused\u处已更改（DependencyObject d、DependencyPropertyChangedEventArgs e）
位于System.Windows.DependencyObject.OnPropertyChanged（DependencyPropertyChangedEventArgs e）
位于System.Windows.FrameworkElement.OnPropertyChanged（DependencyPropertyChangedEventArgs e）
位于System.Windows.DependencyObject.NotifyPropertyChange（DependencyPropertyChangedEventArgs参数）
在System.Windows.DependencyObject.UpdateEffectiveValue（EntryIndex EntryIndex，DependencyProperty dp，PropertyMetadata，EffectiveValueEntry oldEntry，EffectiveValueEntry&newEntry，布尔强制WithDeferredReference，布尔强制WithCurrentValue，OperationType OperationType）
位于System.Windows.DependencyObject.SetValueCommon（DependencyProperty dp、对象值、PropertyMetadata元数据、布尔强制WithDeferredReference、布尔强制WithCurrentValue、OperationType OperationType、布尔isInternal）
位于System.Windows.DependencyObject.SetValue（DependencyPropertyKey，对象值）
在System.Windows.Input.FocusManager.OnFocusedElementChanged（DependencyObject d，DependencyPropertyChangedEventArgs e）
位于System.Windows.DependencyObject.OnPropertyChanged（DependencyPropertyChangedEventArgs e）
位于System.Windows.FrameworkElement.OnPropertyChanged（DependencyPropertyChangedEventArgs e）
位于System.Windows.DependencyObject.NotifyPropertyChange（DependencyPropertyChangedEventArgs参数）
在System.Windows.DependencyObject.UpdateEffectiveValue（EntryIndex EntryIndex，DependencyProperty dp，PropertyMetadata，EffectiveValueEntry oldEntry，EffectiveValueEntry&newEntry，布尔强制WithDeferredReference，布尔强制WithCurrentValue，OperationType OperationType）
位于System.Windows.DependencyObject.SetValueCommon（DependencyProperty dp、对象值、PropertyMetadata元数据、布尔强制WithDeferredReference、布尔强制WithCurrentValue、OperationType OperationType、布尔isInternal）
位于System.Windows.Input.FocusManager.SetFocusedElement（DependencyObject元素，IIInputElement值）
在System.Windows.UIElement.Focus（）处
位于System.Windows.Controls.ListBoxItem.OnVisualParentChanged（DependencyObject oldParent）
在System.Windows.Media.Visual.FireOnVisualParentChanged处（DependencyObject oldParent）
位于System.Windows.Media.Visual.RemoveVisualChild（可视子级）
位于System.Windows.Media.VisualCollection.DisconnectChild（Int32索引）
在System.Windows.Media.VisualCollection.Clear（）中
在System.Windows.Controls.UIElementCollection.ClearInternal（）中
在System.Windows.Controls.Panel.ClearChildren（）中
在System.Windows.Controls.Panel.EnsureEmptyChildren（FrameworkElement logicalParent）上
在System.Windows.Controls.Panel.OnItemChangedInternal（对象发送器，ItemsChangedEventArgs参数