Repopulate Listbox Using a Collectionviewsource - wpf

Question

My first question! I'm moderately familiar with vb but am a n00b with wpf.
I have a form with a listbox and a button. I populate the listbox from a dataset connected to an Access database. The table I am working with is named Entries and has just two columns, EntryID and Entry. When I click on the button, a new entry is added to the database but the listbox is not repopulated.
I have read every answer for this search: "listbox collectionviewsource repopulate" but none seem to address my specific problem.
I set up my Resources as follows:
<Window.Resources>
<CollectionViewSource x:Key="cvsEntries"
Source="{Binding Source={StaticResource TestDataSet}, Path=Entries}">
<CollectionViewSource.SortDescriptions>
<scm:SortDescription PropertyName="Entry" />
</CollectionViewSource.SortDescriptions>
</CollectionViewSource>
</Window.Resources>
I set up the listbox as follows:
<ListBox Name="lstEntries"
DataContext="{StaticResource cvsStandardEntries}"
ItemsSource="{Binding}"
DisplayMemberPath="Entry" />
My code behind for the click event is:
Private Sub btnAdd_Click(sender As Object, e As RoutedEventArgs) Handles btnAdd.Click
Dim taEntries As TestDataSetTableAdapters.EntriesTableAdapter = New TestDataSetTableAdapters.EntriesTableAdapter
taEntries.Insert(NewEntryID, NewEntry)
The database is properly updated but the listbox is not. Based on my understanding of binding, it should be. Am I doing something wrong in my overall approach or have I missed something in the listbox and/or button code.
I know I can add this code to the button:
With taEntries
.ClearBeforeFill = True
.FillByCategory(Entry, EntryID)
End With
I can force the listbox to update but that seems to violate my understanding of Binding and a bit of brute force.
Thanks in advance.

Answer 1

First, Access? sad face...
Second, your DataContext use there is a bit odd. Try this:
<ListBox Name="lstEntries"
ItemsSource="{Binding Source={StaticResource cvsStandardEntries}}"
DisplayMemberPath="Entry" />
Third, TestDataSet isn't observable, so changes made to your database won't be automatically populated back to WPF. Ideally, you should abstract your data layer away -in this case, since you're displaying lists of items in the UI that might change on the fly, you should be using something like ObservableCollection.
That said, if you don't want to go to that effort, you could refresh your collection view manually:
Dim collectionView As ICollectionView = TryCast(lstEntries.ItemsSource, ICollectionView)
collectionView.Refresh()