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copied!<p>Answering my own question here.</p> <p>I solved this by setting SortMemberPath on my generated columns to their index number in the RowVM.Cells collection, and added a SortOnMe property to my RowVMs. </p> <p>When the user sorts the datagrid, it will add a SortDescription containing the index number (taken from the SortMemberPath) to the PagedCollectionView. I monitor this by listening to the propertychanged event on the PagedCollectionView with the method below. It adds a new SortDescription telling the PagedCollectionView to sort on "SortOnMe", and copies the data to sort on from the cell in question to row.SortOnMe.</p> <pre><code>private bool _currentlySorting; private void PagedCollectionView_PropertyChanged(object sender, PropertyChangedEventArgs e) { var pcv = (PagedCollectionView)sender; int columnIndex = 0; if (!_currentlySorting && e.PropertyName == "SortDescriptions" && pcv.SortDescriptions.Count == 1 && int.TryParse(pcv.SortDescriptions[0].PropertyName, out columnIndex)) { _currentlySorting = true; pcv.SortDescriptions.Add(new SortDescription("SortOnMe", pcv.SortDescriptions(0).Direction)); foreach (RowViewModel row in pcv.SourceCollection) { row.SortOnMe = row.Cells(columnIndex).Content; } _currentlySorting = false; } } </code></pre> <p>It's a pretty ugly solution, to be honest. But it works, and I've spent too much time bashing my head against this wall now.</p> <p>Since PagedCollectionView is a sealed class (why?!), the only other way I could think of doing this would be to create my own PagedCollectionView and handle sorting there. </p>

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