Error HRESULT E_FAIL has been returned from a call to a COM component.

[Hammad]

Hi,

I have a RadTreeView in my SL application, i am trying to remove an item from the TreeView but i get this exception

Error HRESULT E_FAIL has been returned from a call to a COM component.
System.Exception occurred
  Message=Error HRESULT E_FAIL has been returned from a call to a COM component.
  StackTrace:
       at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
       at MS.Internal.XcpImports.Collection_RemoveAt[T](PresentationFrameworkCollection`1 collection, UInt32 index)
       at System.Windows.PresentationFrameworkCollection`1.RemoveAtImpl(Int32 index)
       at System.Windows.Controls.ItemCollection.RemoveAtImpl(Int32 index)
       at System.Windows.Controls.ItemCollection.RemoveImpl(Object value)
       at System.Windows.Controls.ItemCollection.RemoveInternal(Object value)
       at System.Windows.PresentationFrameworkCollection`1.Remove(T value)
       at Transforms.Page.btn1_Click(Object sender, RoutedEventArgs e)
  InnerException:

Any ideas? Workarounds etc??

[Petar Mladenov]

Hi Hammad,

This Exception can occur in wide variety of situations, so could you please elaborate more on your scenario. It would be best if you send us a runnable sample and we could provide you with an advice much faster.

Best wishes,
Petar Mladenov
the Telerik team

[Hammad]

Hi,

The item i am trying to remove has some RadTreeViewItem as childs, with Visibility property set to collapsed, when there is no such item in the RadTreeViewItem, it is removed sucessfully.

[Petar Mladenov]

Hi Hammad,

I am unable to reproduce your issue in various basic scenarios. Supposing you scenario is more complex , we definitely need more info on how the tree is bound, whether virtualization is used, how the add/remove operations are implemented and etc.. But still, the best way for us to investigate in depth is to view a runnable sample demonstrating the issue you have come up with.

Regards,
Petar Mladenov
the Telerik team

[JJ Loubser]

 Row_.IsExpanded = oldRow_.IsExpanded;

when  Row_.IsExpanded = false then set to true. Why?

sometimes it worked, sometimes it gives this error:

Error HRESULT E_FAIL has been returned from a call to a COM component.

in

http://www.telerik.com/community/forums/silverlight/treelist/radtreelistview-containerbinding-not-binding.aspx

[Aleksey Dyomin]

Hi Hammad

I have the same trouble, the only workaround i found is to clear binding to ItemsSource property of RadTreeView before you change collection and bind it again after.

[Pavel Pavlov]

Hi guys,

Are we talking about RadTreeView or RadTreeListView ? Anyway, I believe we could be in help here in case we can obtain a small runnable repro project that exposes the issue.

Regards,
Pavel Pavlov
the Telerik team

[Aleksey Dyomin]

Hi Pavel

I try to create solution, unfortunately i cant reproduce it. I only can attach my stack trace

в MS.Internal.XcpImports.CheckHResult(UInt32 hr)
   в MS.Internal.XcpImports.Collection_RemoveAt[T](PresentationFrameworkCollection`1 collection, UInt32 index)
   в System.Windows.PresentationFrameworkCollection`1.RemoveAtImpl(Int32 index)
   в System.Windows.Controls.VirtualizingPanel.RemoveInternalChildRange(Int32 index, Int32 range)
   в Telerik.Windows.Controls.TreeView.TreeViewPanel.RemoveChildRange(GeneratorPosition position, Int32 itemCount, Int32 itemUICount)
   в Telerik.Windows.Controls.TreeView.TreeViewPanel.OnItemsRemove(ItemsChangedEventArgs args)
   в Telerik.Windows.Controls.TreeView.TreeViewPanel.OnItemsChanged(Object sender, ItemsChangedEventArgs args)
   в System.Windows.Controls.VirtualizingPanel.OnItemsChangedInternal(Object sender, ItemsChangedEventArgs args)
   в System.Windows.Controls.VirtualizingPanel.OnItemsChangedHandler(Object sender, ItemsChangedEventArgs args)
   в System.Windows.Controls.Primitives.ItemsChangedEventHandler.Invoke(Object sender, ItemsChangedEventArgs e)
   в System.Windows.Controls.ItemContainerGenerator.RemoveItem(Object item, Int32 itemIndex, DependencyObject container, Int32 containerCount, GeneratorPosition position, ItemBlock block, Int32 offsetFromBlockStart, Boolean raiseReplaceInsteadOfRemove)
   в System.Windows.Controls.ItemContainerGenerator.OnItemRemoved(Object item, Int32 itemIndex, Boolean raiseReplaceInsteadOfRemove)
   в System.Windows.Controls.ItemContainerGenerator.System.Windows.Controls.ICollectionChangedListener.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
   в System.Windows.Controls.WeakCollectionChangedListener.SourceCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   в System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   в System.Windows.Controls.ItemCollection.NotifyCollectionChanged(NotifyCollectionChangedEventArgs e)
   в System.Windows.Controls.ItemCollection.System.Windows.Controls.ICollectionChangedListener.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   в System.Windows.Controls.WeakCollectionChangedListener.SourceCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   в System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   в System.Collections.ObjectModel.ObservableCollection`1.RemoveItem(Int32 index)
   в System.Collections.ObjectModel.Collection`1.Remove(T item)

[Richard]

row.IsExpanded = true will throw this error if row.IsExpandable = false