Hello,

I use XamDataGrid (XDG) in my project. Many XDDG are in the TabItemEx.

I have a NullReferenceException in PresentationFramework when i set the sorted description of the XDG (XAML or in code behind). The exception is thrown when i close the app.

I use PRISM and MVVM pattern in my project

The stackTrace:

at System.Windows.Data.BindingExpression.Deactivate()
   at System.Windows.Data.BindingExpression.DetachOverride()
   at System.Windows.Data.BindingExpressionBase.Detach()
   at System.Windows.Data.BindingExpressionBase.OnDetach(DependencyObject d, DependencyProperty dp)
   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.UIElement.set_Visibility(Visibility value)
   at Infragistics.Windows.DataPresenter.Internal.TemplateDataRecordCache.InitializeCachedCellArea()
   at Infragistics.Windows.DataPresenter.Internal.TemplateDataRecordCache.VerifyCache()
   at Infragistics.Windows.DataPresenter.Internal.TemplateDataRecordCache.GetCellValuePresenter(Field field, Boolean createIfNull)
   at Infragistics.Windows.DataPresenter.CellTextConverterInfo..ctor(Field field)
   at Infragistics.Windows.DataPresenter.CellTextConverterInfo.GetCachedConverter(Field field)
   at Infragistics.Windows.DataPresenter.RecordManager.SameFieldRecordsSortComparer.FieldSortInfo.Initialize(FieldSortDescription fieldSortDescription, SameFieldRecordsSortComparer comparerInfo, FieldLayout fieldLayout)
   at Infragistics.Windows.DataPresenter.RecordManager.SameFieldRecordsSortComparer.FieldSortInfo..ctor(FieldSortDescription fieldSortDescription, SameFieldRecordsSortComparer comparerInfo, FieldLayout fieldLayout)
   at Infragistics.Windows.DataPresenter.RecordManager.SameFieldRecordsSortComparer..ctor(FieldLayout fieldLayout, Int32 recordsBeingSortedCount, Boolean areRecordsInUnsortedOrder)
   at Infragistics.Windows.DataPresenter.RecordManager.SortHelper(Record[] records, Boolean hasGroupByFields, Boolean& hasMultipleFieldLayouts, Boolean areRecordsInUnsortedOrder)
   at Infragistics.Windows.DataPresenter.RecordManager.VerifySort()
   at Infragistics.Windows.DataPresenter.RecordManager.OnSourceCollectionReset()
   at Infragistics.Windows.DataPresenter.RecordManager.PostDelayedReset()
   at Infragistics.Windows.DataPresenter.RecordManager.SetDataSource(IEnumerable currentValue, Boolean postReset)
   at Infragistics.Windows.DataPresenter.RecordManager.set_DataSource(IEnumerable value)
   at Infragistics.Windows.DataPresenter.DataPresenterBase.VerifyRecordManagerDataSource()
   at Infragistics.Windows.DataPresenter.RecordManager.VerifyRootDataSource()
   at Infragistics.Windows.DataPresenter.RecordManager.get_Sorted()
   at Infragistics.Windows.DataPresenter.FilteredDataItemsCollection.HookUnhookRecordManager(Boolean unhook)
   at Infragistics.Windows.DataPresenter.FilteredDataItemsCollection.OnHasListenersChanged()
   at Infragistics.Windows.DataPresenter.FilteredDataItemsCollection.remove_PropertyChanged(PropertyChangedEventHandler value)
   at System.ComponentModel.PropertyChangedEventManager.StopListening(Object source)
   at System.ComponentModel.PropertyChangedEventManager.Purge(Object source, Object data, Boolean purgeAll)
   at MS.Internal.WeakEventTable.Purge(Boolean purgeAll)
   at MS.Internal.WeakEventTable.WeakEventTableShutDownListener.OnShutDown(Object target, Object sender, EventArgs e)
   at MS.Internal.ShutDownListener.HandleShutDown(Object sender, EventArgs e)
   at System.EventHandler.Invoke(Object sender, EventArgs e)
   at System.Windows.Threading.Dispatcher.ShutdownImplInSecurityContext(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Threading.Dispatcher.ShutdownImpl()
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.Run()
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at System.Windows.Application.Run()
   at Sample.App.Main() in c:\Users\XXXXXX\XXXXXXXXXXXXXXXXXXXXXXXXXX\Sample\Sample\obj\Release\App.g.cs:line 54
   at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()

The behavior is strange....

Any suggestion would be appreciated. Thanks.

I attach a sample project to describe this behavior.