Hello!

We have recently tried in our company to switch XamDataGrid in one of our products to grouping, sorting and filtering using CollectionView like that:

<igDP:XamDataGrid.FieldLayoutSettings>
<igDP:FieldLayoutSettings
...
SortEvaluationMode="UseCollectionView"
GroupByEvaluationMode="UseCollectionView"
FilterEvaluationMode="UseCollectionView"
SummaryEvaluationMode="UseLinq"
/>
</igDP:XamDataGrid.FieldLayoutSettings>

Every 3 seconds 5000 records is added to the collection that is a datasource for the grid. The records are added in the UI thread. Some records contain child records. If, during the time of that recurring record addition, I try to do something in the grid, for example, expand some group or scroll through the displayed records, I get IndexOutOfRange exception in the ValidateIndex method of InfragisticsWPF4.v16.1.dll.

Here is the full stack trace:

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InfragisticsWPF4.v16.1.dll!Infragistics.Collections.SparseArray.ValidateIndex(int index = 19893) Line 2297 C#
InfragisticsWPF4.v16.1.dll!Infragistics.Collections.SparseArray.SetItemHelper(int index = 19893, object item = {Infragistics.Windows.DataPresenter.DataRecord}, bool performingAdd = false) Line 2195 C#
InfragisticsWPF4.v16.1.dll!Infragistics.Collections.SparseArray.this[int].set(int index = 19893, object value = {Infragistics.Windows.DataPresenter.DataRecord}) Line 2317 C#
InfragisticsWPF4.DataPresenter.v16.1.dll!Infragistics.Windows.DataPresenter.DataRecordsSynchronizer.Process_CollectionChangedWhenAsyncResetPending(object sender = Count = 19894, System.Collections.Specialized.NotifyCollectionChangedEventArgs e = {System.Collections.Specialized.NotifyCollectionChangedEventArgs}) Line 121 C#
InfragisticsWPF4.DataPresenter.v16.1.dll!Infragistics.Windows.DataPresenter.ListSynchronizer<object,Infragistics.Windows.DataPresenter.DataRecord>.OnSource_CollectionChanged(object sender = Count = 19894, System.Collections.Specialized.NotifyCollectionChangedEventArgs e = {System.Collections.Specialized.NotifyCollectionChangedEventArgs}) Line 232 C#
> System.dll!System.Collections.ObjectModel.ReadOnlyObservableCollection<System.__Canon>.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs args) Unknown
System.dll!System.Collections.ObjectModel.ReadOnlyObservableCollection<System.__Canon>.HandleCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) Unknown
System.dll!System.Collections.ObjectModel.ObservableCollection<object>.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e) Unknown
System.dll!System.Collections.ObjectModel.ObservableCollection<System.__Canon>.InsertItem(int index, System.__Canon item) Unknown
mscorlib.dll!System.Collections.ObjectModel.Collection<object>.Add(object item) Unknown
PresentationFramework.dll!MS.Internal.Data.CollectionViewGroupInternal.Add(object item) Unknown
PresentationFramework.dll!MS.Internal.Data.CollectionViewGroupRoot.AddToSubgroups(object item, MS.Internal.Data.LiveShapingItem lsi, MS.Internal.Data.CollectionViewGroupInternal group, int level, bool loading) Unknown
PresentationFramework.dll!MS.Internal.Data.CollectionViewGroupRoot.AddToSubgroup(object item, MS.Internal.Data.LiveShapingItem lsi, MS.Internal.Data.CollectionViewGroupInternal group, int level, object name, bool loading) Unknown
PresentationFramework.dll!MS.Internal.Data.CollectionViewGroupRoot.AddToSubgroups(object item, MS.Internal.Data.LiveShapingItem lsi, MS.Internal.Data.CollectionViewGroupInternal group, int level, bool loading) Unknown
PresentationFramework.dll!System.Windows.Data.ListCollectionView.PrepareGroups() Unknown
PresentationFramework.dll!System.Windows.Data.ListCollectionView.PrepareLocalArray() Unknown
PresentationFramework.dll!System.Windows.Data.ListCollectionView.RefreshOverride() Unknown
PresentationFramework.dll!System.Windows.Data.CollectionView.RefreshInternal() Unknown
PresentationFramework.dll!System.Windows.Data.CollectionView.Refresh() Unknown

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Moreover, grid's filters work very unstable. Sometimes, they stop working after several filtrations.

Any solution to that problem will be highly appreciated!