.net 3.5 - Virtualizing WPF Wrap Panel Issue -

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There is not a lot of options for virtualization wrap panels for use in WPF. For one reason or another the MS decided to not do a ship in the standard library.

Anybody can be so bold to provide a crowded source response (and explaination) for the first work item on the following CodePlex project, I would appreciate it:

< P>

Thank you!

Problem Summary:

I have tried to use recently. Verticalizing Loppanal has faced another bug from this project.

Repeating steps: ..

  • Create listbox
  • Setting wrappanel virtualizing the itemhost in a listboxpanel template
  • Tie the ItemSource of the listbox to a noticeable collection.
  • Remove an item from the support noticeable archive.

    • Debug.Assert fails (Debug.Assert (child = = _children [childIndex], "wrong child was generated");) In MeasureOverride, and a null in the cleaning method Exceptions continue to execute the results [see attached screenshots]. .

    Please let me know if you are able to fix it

    Thank you,

    AO

    Code: < / P>

    OnItemsChanged method to handle arguments properly Needs parameters For more information, please see it to copy the code from that question, you have to change the joyms as if it has been changed: 

      Secure Override Zero OnItemsChanged (Object Sender, ItemsChangedEventArgs args) { Base.OnItemsChanged (sender, args); _abstractPanel = null; ResetScrollInfo (); // ... Add this ... Switch (Argument Action) {case NotifyCollectionChangedAction.Remove: case NotifyCollectionChangedAction.Replace: RemoveInternalChildRange (args.Position.Index, args.ItemUICount); break; Case Notification Changed Action Remove: RemoveINealChildrenz (Argopp. Indices, Argus item count); break; }}

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