[英]Entity Framework 4 - Sorting by foreign entity
I get 我懂了
'System.Windows.Data.BindingListCollectionView' view does not support sorting
when I use the following CollectionViewSource: 当我使用以下CollectionViewSource时:
<CollectionViewSource Source="{Binding Path=CourseSessions}" x:Key="cvsCourses">
<CollectionViewSource.SortDescriptions>
<ComponentModel:SortDescription PropertyName="StartDate"/>
</CollectionViewSource.SortDescriptions>
</CollectionViewSource>
The DataContext is an ObservableCollection<Course>
. DataContext是一个ObservableCollection<Course>
。 I am using Entity Framework 4 and CourseSessions is a property of Course: 我正在使用Entity Framework 4,CourseSessions是Course的属性:
public ObjectSet<CourseSession> CourseSessions
How can I specify sorting in this case, short of sorting the data coming out of the database? 在这种情况下,如何对排序进行排序,而不对从数据库中出来的数据进行排序?
I think the problem is that ObjectSet does not support sorting. 我认为问题在于ObjectSet不支持排序。 Please, have a look to this article by Nicholas Romanidis: Using a CollectionViewSource to display Master-Detail sorted EntityCollections 请看看Nicholas Romanidis的这篇文章: 使用CollectionViewSource显示按主从排序的EntityCollections
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