WPF篩選CollectionViewSource

Question

我有一個從數據集中繪製數據的WPF項目。在一個特定視圖我有一個網格，我想表明

我讀過，我不能過濾一個BindingListView數據的過濾版本，但是這是一個CollectionViewSource

我的代碼是這樣的： -

Private Sub UserControl_Loaded_1(sender As Object, e As RoutedEventArgs) Handles MyBase.Loaded 

Dim _ds As CantileverDataSet 
Dim _carcasseTableAdapter As CantileverDataSetTableAdapters.MaterialsTableAdapter 
Dim _carcasseViewSource As CollectionViewSource 

_ds = CType(Me.FindResource("CantileverDataSet"), CantileverDataSet) 

_carcasseTableAdapter = New CantileverDataSetTableAdapters.MaterialsTableAdapter 
_carcasseTableAdapter.Fill(_ds.Materials) 
_carcasseViewSource = CType(Me.FindResource("MaterialsViewSource"), CollectionViewSource) 

AddHandler _carcasseViewSource.Filter, AddressOf CarcasseFilter 
End Sub 

Private Sub CarcasseFilter(ByVal sender As System.Object, ByVal e As FilterEventArgs) 
    'Accept everything for now 

    e.Accepted = True 
End Sub 

我得到的錯誤是

'System.Windows.Data.BindingListCollectionView' 視圖不支持篩選。

如果我做_carcasseViewSource.GetType我得到CollectionViewSource 如果我做_carcasseViewSource.View.GetType我得到BindingListCollectionView

這是因爲如果它是治療我的_carcasseViewSource作爲BindingListCollectionView無論

這裏是的XAML電網以防萬一

<Grid x:Name="CarcasseGrid" DataContext="{StaticResource MaterialsViewSource}" > 
     <Grid.ColumnDefinitions> 
      <ColumnDefinition Width="Auto"/> 
      <ColumnDefinition Width="Auto"/> 
     </Grid.ColumnDefinitions> 
     <Grid.RowDefinitions> 
      <RowDefinition Height="Auto"/> 
      <RowDefinition Height="Auto"/> 
     </Grid.RowDefinitions> 
     <Label Content="Material Code:" Grid.Column="0" Grid.Row="0"/> 
     <TextBox x:Name="MaterialCodeTextBox" Grid.Column="1" Grid.Row="0" Text="{Binding MaterialCode, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}"/> 
     <Label Content="Name:" Grid.Column="0" Grid.Row="1"/> 
     <TextBox x:Name="NameTextBox" Grid.Column="1" Grid.Row="1" Text="{Binding Name, Mode=TwoWay, NotifyOnValidationError=true, ValidatesOnExceptions=true}"/> 
    </Grid> 

任何想法，將不勝感激

Answer 1

使用數據集/數據表時，可以使用IBindingListView.Filter。

看看this爲過濾器表達式