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Silverlight Datagrid paging issue

SL4 provides following items for datapaging: DataPager control, PagedCollectionView to wrap data for datapager, DomainDatasource for paging, sort and filter in xaml.

Question: 1.With Datapager, data only loaded for specific page, no more data cached, no more extra code needed, rightt?

  1. Even data come from SP with EF, if the data wrapped by PagedCollectionView in VM, all paging function will be available, no extra code, right?

If the answer is no, what's the best solution for datagrid datapaging? Do I need to write code in stored procedure for paging?

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