Hello,
My Master-Detail datagrid uses ObservableCollection as the DataSource. When I call the Clear() method on the collection, an unhandled exception is triggered in the grid. The log is below. Has anyone already observed a similar behavior? Thanks!
System.ArgumentNullException: Value cannot be null.
Parameter name: key
at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument
argument)
at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
at
Xceed.Wpf.DataGrid.SelectionManager.ToggleSelection(DataGridContext
context, Object item, Boolean assumeInItemsCollection, Boolean&
selected)
at Xceed.Wpf.DataGrid.DataGridContext.DoToggleSelection(Object item)
at Xceed.Wpf.DataGrid.DataGridContext.UpdateSelection()
at Xceed.Wpf.DataGrid.DataGridContext.SetCurrent(Object item, Column
column, Boolean forceFocus)
at
Xceed.Wpf.DataGrid.CurrencyManager.ChangeDataGridContextCurrentItem()
at
Xceed.Wpf.DataGrid.CurrencyManager.OnCollectionViewCurrentChanged(Object
sender, EventArgs e)
at System.Windows.Data.CollectionView.OnCurrentChanged()
at
System.Windows.Controls.ItemCollection.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type
managerType, Object sender, EventArgs e)
at System.Windows.WeakEventManager.DeliverEventToList(Object sender,
EventArgs args, ListenerList list)
at System.Windows.WeakEventManager.DeliverEvent(Object sender,
EventArgs args)
at
System.ComponentModel.CurrentChangedEventManager.OnCurrentChanged(Object
sender, EventArgs args)
at System.Windows.Data.CollectionView.OnCurrentChanged()
at
Xceed.Wpf.DataGrid.DataGridCollectionViewBase.DeferCurrencyEventHelper.Dispose()
at Xceed.Wpf.DataGrid.DataGridCollectionView.ForceRefresh(Boolean
sendResetNotification, Boolean initialLoad, Boolean
setCurrentToFirstOnInitialLoad)
at
Xceed.Wpf.DataGrid.DataGridCollectionView.ExecuteSourceItemOperation(DeferredOperation
deferredOperation)
at
Xceed.Wpf.DataGrid.DataGridCollectionViewBase.ExecuteOrQueueSourceItemOperation(DeferredOperation
deferredOperation)
at
Xceed.Wpf.DataGrid.DataGridCollectionViewBase.NotifyCollectionChanged_CollectionChanged(Object
sender, NotifyCollectionChangedEventArgs e)
at
Xceed.Wpf.DataGrid.DataGridCollectionViewBase.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type
managerType, Object sender, EventArgs e)
at System.Windows.WeakEventManager.DeliverEventToList(Object sender,
EventArgs args, ListenerList list)
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.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs
e)
at System.Collections.ObjectModel.ObservableCollection`1.ClearItems()
at System.Collections.ObjectModel.Collection`1.Clear()
at
TraderStation.OrderRouting.Gui.WPF.Blotter.BlotterViewModel.<ClearBlotter>b__0()
in
m:\SRVPARSTTD01_SFY_TX_release_view\EMP\Projects\NewGen\TraderStation\OrderRouting\TraderStation.OrderRouting\Gui\WPF\Blotter\BlotterViewModel.cs:line
109
at Iaplus.Threading.DelegateTask.Execute() in
d:\SFY\Views\SRVPAREMS6_SFY_Iaplus.Threading_release_view\ECN_COMMON\Frameworks\Iaplus\Threading\Component\DelegateTask.cs:line
40
at Iaplus.Threading.ExceptionManager.ExecuteTask(ITask task) in
d:\SFY\Views\SRVPAREMS6_SFY_Iaplus.Threading_release_view\ECN_COMMON\Frameworks\Iaplus\Threading\Component\ExceptionManager.cs:line
134
at Iaplus.Threading.WindowsForms.NativeGuiDispatcherBase.Process() in
d:\SFY\Views\SRVPAREMS6_SFY_Iaplus.Threading_release_view\ECN_COMMON\Frameworks\Iaplus\Threading\Component\WindowsForms\NativeGuiDispatcher.cs:line
96
at
Iaplus.Threading.WindowsForms.NativeGuiDispatcherBase.Control.WndProc(Message&
m) in
d:\SFY\Views\SRVPAREMS6_SFY_Iaplus.Threading_release_view\ECN_COMMON\Frameworks\Iaplus\Threading\Component\WindowsForms\NativeGuiDispatcher.cs:line
142
at
System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message&
m)
at
System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg,
IntPtr wparam, IntPtr lparam)
