LINQ query to Observable collection

I've got an observable collection that contains multiple DocumentEntry objects that each have a language property. I present this in a DataGrid so that the documents can be updated, but that became too many entries, so I've added a combobox with language names and now I need to present only the documents of that language.

The collection of documents is an ObservableCollection, but when I say

myDataGrid.DataContext = (from d in documents where d.language == selectedLanguage select d);

the result of the LINQ query is not an observable collection. Do I filter this the right way at all? How can I best filter an ObservableCollection in my datagrid, in 开发者_JAVA技巧this case by language?

Cheers

Nik

Better to yous CollectionViewSource.Filter

Something like this

myDataGrid.DataContext = documents;
CollectionViewSource cvs = CollectionViewSource.GetDefaultView(documents);
vse.Filter = delegate(object obj)
{
   Document doc = obj as Document;
   if(doc == null)
       return false;
   return doc.language == selectedLanguage;
}

Try This,

XAML:

<Listbox x:name="MyLB"/>

CB:

Dim q = from c as myobject in myobservablecollection where c.CriteriaA= CriteriaB

MyLb.Itemsource =  q.ToList

Fundamental being : Datacontext can only be set for objects which have been created. As far as LINQ is concerned, You need to pass the LINQ result query as TOLIST to reflect the filtered view .

NOTE: This will not update as ToList is a generic list and has no INotifyPropertyChanged implemented.