Linq to SQL DataGrid Filter

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I am attempting to filter the Linq to SQL querry results using ICollectionView but I keep getting an error that the method is not supported. Can someone please review the code below and tell me why the view is not able to be filtered?

XML

viewDataContext dc_view = new viewDataContext();

            var view_query = from e_view in dc_view.user_views
                            select e_view;

            data_grid.ItemsSource = view_query;

            ICollectionView linq_view = CollectionViewSource.GetDefaultView(data_grid.ItemsSource);

            linq_view.Filter = new Predicate<object>((o) => ((user_view)o).name.StartsWith("Scott"));

Posted 23-Oct-12 8:31am

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Clifford Nelson · Answer 1 · 2012-10-23T16:00:00

This is only a guess since I cannot run the code with what little you have provided, but have you tried the following:

viewDataContext dc_view = new viewDataContext();
var view_query = from e_view in dc_view.user_views select e_view;
data_grid.ItemsSource = view_query;
var linq_view = CollectionViewSource.GetDefaultView(view_query);
linq_view.Filter = new Predicate<object>((o) => ((user_view)o).name.StartsWith("Scott"));.

I run the following and it works:

XML

var tests = new[] { new test { Name = "a" }, new test { Name = "b" }, new test { Name = "ab" }, new test { Name = "bb" } };
ICollectionView linq_view = CollectionViewSource.GetDefaultView(tests);
linq_view.Filter = new Predicate<object>(o => ((test)o).Name.StartsWith("a"));

It may be that using the ItemsSource as the argument is causing you the problems.