ListViewBase.LoadMoreItemsAsync throws exception

Question

ListViewBase.LoadMoreItemsAsync throws exception saying 'The method or operation is not implemented'.

I have a GridView and data is bound to virtualized vector returned from FIF.GetVirtualizedFilesVector, when user click individual item, FlilpView is loaded. Data source for the flipview is attached to ObservableCollection<MyObject>(), MyObject is a wrapper of the FileInformation which is bind to individual item of FlipView.

When user reaches nth object (before the last object of current IVectorView),  ListViewBase.LoadMoreItemsAsync is called and adding new items in the list.

But LoadMoreItemsAsync throws exception. Any idea why?

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Answer 1

This is a bug that will likely not be fixed.  The scenario of incrementally loading items programmatically can be achieved by calling ICollectionView.LoadMoreItemsAsync or ISupportIncrementalLoading.LoadMoreItemsAsync.

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Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.

Answer 2

This is probably because the object returned from GetVirtualizedFilesVector doesn't support ISupportIncrementalLoading

Answer 3

Is there any workaround?

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Answer 4

Please see my post above.

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Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.