C# xaml第二次打开弹出窗口时出错

我在弹出窗口上的DataGrid中显示搜索结果，一旦选择了一个项目，弹出窗口将关闭，所选项目将显示在页面上。第一次打开和关闭时一切正常，但当我尝试重新打开弹出窗口时，在OnPropertyChanged（“IsOpen”）调用上出现了一个未处理的异常“PresentationFramework.dll中发生了类型为'System.InvalidOperationException'的未处理异常”

视图：

此处发生错误：

protected virtual void OnPropertyChanged(string propertyName)
{
    this.VerifyPropertyName(propertyName);

    if (this.PropertyChanged != null)
    {
         var e = new PropertyChangedEventArgs(propertyName);   
         this.PropertyChanged(this, e);   <----- error
    }
}

受保护的虚拟void OnPropertyChanged（字符串propertyName）
{
这个.VerifyPropertyName（propertyName）；
if（this.PropertyChanged！=null）
{
var e=新的PropertyChangedEventArgs（propertyName）；
this.PropertyChanged（this，e）；尝试以下操作

public bool SearchNotes(NoteModel CurrentNote, string sSearch)
    {
        //check the open connection
        if (ConnectData.OpenConnection() == true)
        {
            try
            {
                string SQLSearch = "select note_id, date, time, note from note where date like '%" + sSearch + "%' or time like '%" + sSearch + "%' or note like '%" + sSearch + "%' group by note_id, date, time, note";

                //get the phone types for lookups
                SqlCommand cmdSearchNotes = new SqlCommand(SQLSearch, ConnectData.connection);
                SqlDataReader drSearchResults = cmdSearchNotes.ExecuteReader();

                // CHANGE IS HERE !!!!!!!!!!!!!!!!
                var list = new List<NoteModel.SearchResult>();

                while (drSearchResults.Read())
                {
                    CurrentNote.SearchResults.Add(new NoteModel.SearchResult()
                    {
                        NoteID = (int)drSearchResults["note_id"],
                        Date = drSearchResults["date"].ToString(),
                        Time = drSearchResults["time"].ToString(),
                        Note = (string)drSearchResults["note"]
                    });
                }

                // CHANGE IS HERE !!!!!!!!!!!!!!!! 
                CurrentNote.SearchResults = list;
                drSearchResults.Dispose();
                cmdSearchNotes.Dispose();

                //close Connection
                ConnectData.CloseConnection();

                return true;
            }
            catch (SqlException ex)
            {
                return false;
                throw new ApplicationException("Something went wrong with fetching the note search results: ", ex);
            }
        }
        //connection failed
        else
        {
            return false;
        }
    }

WPF中发生了一些操作。然后您去更改该列表的内容，这就是导致错误的原因。
您是如何触发SearchNote命令的。听起来好像某个线程被调度到错误的线程上。它是从“查看搜索”按钮触发的。当异常停止您的程序时，它在哪个线程中？请注意在“线程”窗口中单击“确定”。同时确保所有异常都已打开（调试/窗口/异常设置）在上，您将捕获抛出的第一个。SearchResults是如何生成的。是否有可能由于数据库查询或HTTP调用或其他原因而从其他线程修改此属性？谢谢，我没有想到这一点。you absolute star:）//也更改了此列表。Add（new NoteModel.SearchResult（）{NoteID=（int）drSearchResults[“note_id”]，Date=drSearchResults[“Date”]。ToString（），Time=drSearchResults[“Time”]。ToString（），note=（string）drSearchResults[“note”]}）}不客气：）这是一个很好的谜题。但是一个提示。从异常中获取消息并将其粘贴到谷歌。这就是让我知道该查找什么的缺失信息。
protected virtual void OnPropertyChanged(string propertyName)
{
    this.VerifyPropertyName(propertyName);

    if (this.PropertyChanged != null)
    {
         var e = new PropertyChangedEventArgs(propertyName);   
         this.PropertyChanged(this, e);   <----- error
    }
}

public bool SearchNotes(NoteModel CurrentNote, string sSearch)
        {
            //check the open connection
            if (ConnectData.OpenConnection() == true)
            {
                try
                {
                    string SQLSearch = "select note_id, date, time, note from note where date like '%" + sSearch + "%' or time like '%" + sSearch + "%' or note like '%" + sSearch + "%' group by note_id, date, time, note";

                    //get the phone types for lookups
                    SqlCommand cmdSearchNotes = new SqlCommand(SQLSearch, ConnectData.connection);
                    SqlDataReader drSearchResults = cmdSearchNotes.ExecuteReader();
                    CurrentNote.SearchResults = new List<NoteModel.SearchResult>();

                    while (drSearchResults.Read())
                    {
                        CurrentNote.SearchResults.Add(new NoteModel.SearchResult()
                        {
                            NoteID = (int)drSearchResults["note_id"],
                            Date = drSearchResults["date"].ToString(),
                            Time = drSearchResults["time"].ToString(),
                            Note = (string)drSearchResults["note"]
                        });
                    }
                    drSearchResults.Dispose();
                    cmdSearchNotes.Dispose();

                    //close Connection
                    ConnectData.CloseConnection();

                    return true;
                }
                catch (SqlException ex)
                {
                    return false;
                    throw new ApplicationException("Something went wrong with fetching the note search results: ", ex);
                }
            }
            //connection failed
            else
            {
                return false;
            }
        }

public bool FetchNote(NoteModel CurrentNote, int NoteID)
{
    //check the open connection
    if (ConnectData.OpenConnection() == true)
    {
        try
        {
            string SQLSearch = "select note_id, date, time, note from note where note_id = " + NoteID;

            //get the phone types for lookups
            SqlCommand cmdFetchNote = new SqlCommand(SQLSearch, ConnectData.connection);
            SqlDataReader drFetchNote = cmdFetchNote.ExecuteReader();

            while (drFetchNote.Read())
            {
                CurrentNote.NoteID = (int)drFetchNote["note_id"];
                CurrentNote.Date = drFetchNote["date"].ToString();
                CurrentNote.Time = drFetchNote["time"].ToString();
                CurrentNote.Note = (string)drFetchNote["note"];
                CurrentNote.SearchResults = null;
            }
            drFetchNote.Dispose();
            cmdFetchNote.Dispose();

            //close Connection
            ConnectData.CloseConnection();

            return true;
        }
        catch (SqlException ex)
        {
            return false;
            throw new ApplicationException("Something went wrong with fetching the note: ", ex);
        }
    }
    //connection failed
    else
    {
        return false;
    }
}

   σε System.Windows.Controls.ItemContainerGenerator.Verify()
   σε System.Windows.Controls.VirtualizingStackPanel.MeasureChild(IItemContainerGenerator& generator, IContainItemStorage& itemStorageProvider, IContainItemStorage& parentItemStorageProvider, Object& parentItem, Boolean& hasUniformOrAverageContainerSizeBeenSet, Double& computedUniformOrAverageContainerSize, Double& computedUniformOrAverageContainerPixelSize, Boolean& computedAreContainersUniformlySized, IList& items, Object& item, IList& children, Int32& childIndex, Boolean& visualOrderChanged, Boolean& isHorizontal, Size& childConstraint, Rect& viewport, VirtualizationCacheLength& cacheSize, VirtualizationCacheLengthUnit& cacheUnit, Boolean& foundFirstItemInViewport, Double& firstItemInViewportOffset, Size& stackPixelSize, Size& stackPixelSizeInViewport, Size& stackPixelSizeInCacheBeforeViewport, Size& stackPixelSizeInCacheAfterViewport, Size& stackLogicalSize, Size& stackLogicalSizeInViewport, Size& stackLogicalSizeInCacheBeforeViewport, Size& stackLogicalSizeInCacheAfterViewport, Boolean& mustDisableVirtualization, Boolean isBeforeFirstItem, Boolean isAfterFirstItem, Boolean isAfterLastItem, Boolean skipActualMeasure, Boolean skipGeneration, Boolean& hasBringIntoViewContainerBeenMeasured, Boolean& hasVirtualizingChildren)
   σε System.Windows.Controls.VirtualizingStackPanel.MeasureOverrideImpl(Size constraint, Nullable`1& lastPageSafeOffset, List`1& previouslyMeasuredOffsets, Nullable`1& lastPagePixelSize, Boolean remeasure)
   σε System.Windows.Controls.VirtualizingStackPanel.MeasureOverride(Size constraint)
   σε System.Windows.Controls.Primitives.DataGridRowsPresenter.MeasureOverride(Size constraint)
   σε System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   σε System.Windows.UIElement.Measure(Size availableSize)
   σε System.Windows.ContextLayoutManager.UpdateLayout()
   σε System.Windows.UIElement.UpdateLayout()
   σε System.Windows.Interop.HwndSource.SetLayoutSize()
   σε System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
   σε System.Windows.Interop.HwndSource.set_RootVisual(Visual value)
   σε System.Windows.Controls.Primitives.Popup.SetRootVisualToPopupRoot()
   σε System.Windows.Controls.Primitives.Popup.CreateWindow(Boolean asyncCall)
   σε System.Windows.Controls.Primitives.Popup.OnIsOpenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   σε System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   σε System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   σε System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   σε System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   σε System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp, Boolean preserveCurrentValue)
   σε System.Windows.Data.BindingExpressionBase.Invalidate(Boolean isASubPropertyChange)
   σε System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
   σε System.Windows.Data.BindingExpression.ScheduleTransfer(Boolean isASubPropertyChange)
   σε MS.Internal.Data.ClrBindingWorker.NewValueAvailable(Boolean dependencySourcesChanged, Boolean initialValue, Boolean isASubPropertyChange)
   σε MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32 k, ICollectionView collectionView, Object newValue, Boolean isASubPropertyChange)
   σε MS.Internal.Data.ClrBindingWorker.OnSourcePropertyChanged(Object o, String propName)
   σε MS.Internal.Data.PropertyPathWorker.OnPropertyChanged(Object sender, PropertyChangedEventArgs e)
   σε System.Windows.WeakEventManager.ListenerList`1.DeliverEvent(Object sender, EventArgs e, Type managerType)
   σε System.ComponentModel.PropertyChangedEventManager.OnPropertyChanged(Object sender, PropertyChangedEventArgs args)
   σε ObservableObject.OnPropertyChanged(String propertyName) στο C:\Users\treej\Source\Repos\FiloFix\FiloFix\Helper Classes\ObservableObject.cs:γραμμή 24
   σε FiloFix.ViewModel.NoteViewModel.set_IsOpen(Boolean value) στο C:\Users\treej\Source\Repos\FiloFix\FiloFix\ViewModel\NoteViewModel.cs:γραμμή 113
   σε FiloFix.ViewModel.NoteViewModel.SearchNote() στο C:\Users\treej\Source\Repos\FiloFix\FiloFix\ViewModel\NoteViewModel.cs:γραμμή 50
   σε FiloFix.ViewModel.NoteViewModel.<get_SearchNoteCommand>b__8_1(Object p) στο C:\Users\treej\Source\Repos\FiloFix\FiloFix\ViewModel\NoteViewModel.cs:γραμμή 35
   σε RelayCommand.Execute(Object parameter) στο C:\Users\treej\Source\Repos\FiloFix\FiloFix\Helper Classes\RelayCommand.cs:γραμμή 28
   σε MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
   σε System.Windows.Controls.Primitives.ButtonBase.OnClick()
   σε System.Windows.Controls.Button.OnClick()
   σε System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   σε System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
   σε System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   σε System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   σε System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   σε System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   σε System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   σε System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   σε System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   σε System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   σε System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   σε System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   σε System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   σε System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   σε System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   σε System.Windows.Input.InputManager.ProcessStagingArea()
   σε System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   σε System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   σε System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   σε System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   σε System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   σε MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   σε MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   σε System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   σε System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   σε System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   σε MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   σε MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   σε System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   σε System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   σε System.Windows.Application.RunDispa...

public bool SearchNotes(NoteModel CurrentNote, string sSearch)
    {
        //check the open connection
        if (ConnectData.OpenConnection() == true)
        {
            try
            {
                string SQLSearch = "select note_id, date, time, note from note where date like '%" + sSearch + "%' or time like '%" + sSearch + "%' or note like '%" + sSearch + "%' group by note_id, date, time, note";

                //get the phone types for lookups
                SqlCommand cmdSearchNotes = new SqlCommand(SQLSearch, ConnectData.connection);
                SqlDataReader drSearchResults = cmdSearchNotes.ExecuteReader();

                // CHANGE IS HERE !!!!!!!!!!!!!!!!
                var list = new List<NoteModel.SearchResult>();

                while (drSearchResults.Read())
                {
                    CurrentNote.SearchResults.Add(new NoteModel.SearchResult()
                    {
                        NoteID = (int)drSearchResults["note_id"],
                        Date = drSearchResults["date"].ToString(),
                        Time = drSearchResults["time"].ToString(),
                        Note = (string)drSearchResults["note"]
                    });
                }

                // CHANGE IS HERE !!!!!!!!!!!!!!!! 
                CurrentNote.SearchResults = list;
                drSearchResults.Dispose();
                cmdSearchNotes.Dispose();

                //close Connection
                ConnectData.CloseConnection();

                return true;
            }
            catch (SqlException ex)
            {
                return false;
                throw new ApplicationException("Something went wrong with fetching the note search results: ", ex);
            }
        }
        //connection failed
        else
        {
            return false;
        }
    }

CurrentNote.SearchResults = ...