wpf collectionview multiple filter

Question

私はいくつかのアドバイスが必要です。私は2つのListViewを最初に持っているListViewは "ListViewAlbums"と2番目の "ListViewTracks"です。 ListViewTracksの項目はグループ化されています。 ListViewAlbumsが設定されています。SelectionMode = "Extended"およびビヘイビア：MultiSelectorBehaviours.SynchronizedSelectedItems。 MultiSelectorBehaviours

ListViewAlbumsから複数の項目を選択すると、ListViewTracksのすべての項目をALBUMIDに基づいて表示したいと考えています。

私の現在のコード：

ListViewTracksのGroupDescriptions：

PropertyGroupDescription groupDescription = new PropertyGroupDescription("AlbumID"); 
viewTrack.GroupDescriptions.Add(groupDescription); 

viewTrack.SortDescriptions.Add(new System.ComponentModel.SortDescription("AlbumTitle", System.ComponentModel.ListSortDirection.Ascending)); 
viewTrack.SortDescriptions.Add(new System.ComponentModel.SortDescription("TitleTrack", System.ComponentModel.ListSortDirection.Ascending)); 

従業員データ：ListViewAlbumsの

 private ObservableCollection<EmployeesAlbums> _listAlbums = new ObservableCollection<EmployeesAlbums>(); 
    public ObservableCollection<EmployeesTracks> _listTrack = new ObservableCollection<EmployeesTracks>(); 


    public ObservableCollection<EmployeesTracks> PlayListTracks 
    { 
     get { return _listTrack; } 
     set { _listTrack = value; RaisePropertyChanged("PlayListTracks"); } 
    } 
    public ObservableCollection<EmployeesAlbums> PlayListAlbums 
    { 
     get { return _listAlbums; } 
     set { _listAlbums = value; RaisePropertyChanged("PlayListAlbums"); } 
    } 
    EmployeesAlbums model = new EmployeesAlbums 
    { 
     IdAlbums = int.Parse(rdr["Id"].ToString()), 
     TitleAlbum = rdr["TitleAlbums"].ToString(), 
     ArtistAlbum = rdr["ArtistAlbums"].ToString() 
    }; 
    modelTracks = new EmployeesTracks 
    { 
     IdTrack = int.Parse(rdr["Id"].ToString()), 
     TitleTrack = rdr["TitleTrack"].ToString(), 
     PathTrack = rdr["Path"].ToString(), 
     AlbumTitle = rdr["AlbumTitle"].ToString(), 
     ArtistTrack = rdr["ArtistTrack"].ToString(), 
     AlbumID = int.Parse(rdr["AlbumId"].ToString()).ToString() 

    }; 

のSelectedItem：

SelectionChangedItemsAlbumCommand = new GalaSoft.MvvmLight.CommandWpf.RelayCommand(SelectionChangedItemsAlbum);  

    private EmployeesAlbums _selectedPlayListFileAlbum;  
    public EmployeesAlbums SelectedPlayListFileAlbum 
    { 
     get { return _selectedPlayListFileAlbum; } 
     set 
     { 

      if (_selectedPlayListFileAlbum != value) 
      { 
       _selectedPlayListFileAlbum = value; 
       RaisePropertyChanged("SelectedPlayListFileAlbum"); 
      }  
     } 
    } 

    private IEnumerable<EmployeesAlbums> _selectedPlayListFilesAlbums; 
    public IEnumerable<EmployeesAlbums> SelectedPlayListFilesAlbums 
    { 
     get { return this.selectedPlayListFilesAlbums; } 
     set { Set(ref selectedPlayListFilesAlbums, value); } 
    } 

フィルタリング：

public string AlbumID { get; set; } 
    void SelectionChangedItemsAlbum() 
    { 

      foreach (var items in SelectedPlayListFilesAlbums) 
      { 

       ListCollectionView empView = CollectionViewSource.GetDefaultView(PlayListTracks) as ListCollectionView; 
       // Enable Live Filtering of the ListViewCollection 
       empView.IsLiveFiltering = true; 
       // Enable the filtering on AlbumID 
       empView.LiveFilteringProperties.Add("AlbumID"); 
       AlbumID = items.IdAlbums.ToString(); 
       // Filter based upon AlbumID 
       empView.Filter = new Predicate<object>(IsMatchFoundAlbums); 
       // Refresh Collection 
       empView.Refresh(); 
      } 
    } 
    bool IsMatchFoundAlbums(object d) 
    { 
     bool res = false; 
     EmployeesTracks emp = d as EmployeesTracks; 
      if (emp.AlbumID == AlbumID) 
      { 
       res = true; 
      }    
     return res; 
    } 

XAMLコード：

<ListView x:Name="ListViewTracks" 

     VirtualizingPanel.ScrollUnit="Pixel" 
     VirtualizingStackPanel.CacheLength="20,20" 
     VirtualizingStackPanel.CacheLengthUnit="Item" 

     ItemsSource="{Binding PlayListTracks}" 
     Style="{StaticResource CommonListViewStyleTracks}"  
     ItemContainerStyle="{DynamicResource styleListViewItem}"  
    > 

<ListView.GroupStyle> 
      <GroupStyle> 
       <GroupStyle.Panel> 
        <ItemsPanelTemplate> 

         <VirtualizingStackPanel/> 

        </ItemsPanelTemplate> 
       </GroupStyle.Panel> 
       <GroupStyle.ContainerStyle> 
        <Style TargetType="{x:Type GroupItem}" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"> 
         <Setter Property="Control.Template"> 
          <Setter.Value> 
           <ControlTemplate TargetType="{x:Type GroupItem}"> 
            <StackPanel> 
             <ContentPresenter Content="{TemplateBinding ContentControl.Content}" 
             ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}" 
             ContentStringFormat="{TemplateBinding ContentControl.ContentStringFormat}" /> 
             <ItemsPresenter Margin="0,0,0,20" /> 
            </StackPanel> 
           </ControlTemplate> 
          </Setter.Value> 
         </Setter> 
        </Style> 
       </GroupStyle.ContainerStyle> 
       <GroupStyle.HeaderTemplate> 
        <DataTemplate > 

         <Grid d:DesignWidth="460" Height="51"> 
          <StackPanel> 
           <TextBlock DataContext="{Binding Items}" Text="{Binding AlbumTitle}" FontSize="18" TextTrimming="CharacterEllipsis" Foreground="{DynamicResource ItemsListViewForeground}"/> 
           <TextBlock DataContext="{Binding Items}" Text="{Binding ArtistTrack}" TextTrimming="CharacterEllipsis" Foreground="{DynamicResource AccentColorApps}"/> 
          </StackPanel> 
         </Grid> 
        </DataTemplate> 
       </GroupStyle.HeaderTemplate> 
      </GroupStyle> 
     </ListView.GroupStyle> 
     </ListView> 

     <ListView 

       x:Name="ListViewAlbums" 
       VirtualizingPanel.IsVirtualizing="True" 
       VirtualizingPanel.VirtualizationMode="Recycling" 
       IsSynchronizedWithCurrentItem="True" 
       ItemsSource="{Binding PlayListAlbums}" 
       SelectionMode="Extended" 
       SelectedItem="{Binding SelectedPlayListFileAlbum,UpdateSourceTrigger=PropertyChanged}" SelectionMode="Extended" 
       behaviours:MultiSelectorBehaviours.SynchronizedSelectedItems="{Binding SelectedPlayListFilesAlbums, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" 
       Background="{x:Null}" Grid.Column="1" Grid.RowSpan="4" 
       ItemTemplate="{DynamicResource AlbumsDataTemplate}" 
       BorderBrush="{x:Null}" 
       > 
     <ie:Interaction.Triggers > 
      <ie:EventTrigger EventName="SelectionChanged"> 
       <ie:InvokeCommandAction Command="{Binding SelectionChangedItemsAlbumCommand}" 
         CommandParameter="{Binding SelectedItem, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListView}}}"/> 
      </ie:EventTrigger> 
     </ie:Interaction.Triggers> 
     </ListView> 

どうもありがとうございました。

Answer 1

、あなたは、プロパティPlaylistTracksを初期化した直後にこの

をか試してみてください。

ListCollectionView empView = CollectionViewSource.GetDefaultView(PlayListTracks) as ListCollectionView; 
empView.Filter = IsMatchFoundAlbums; 

そして、あなたのマッチ方法が可能ましょう：

bool IsMatchFoundAlbums(object d) 
{ 
    EmployeesTracks emp = d as EmployeesTracks; 
    return SelectedPlayListFilesAlbums.Any(x => x.IdAlbums == emp.AlbumID); 
}