[英]Filter CollectionViewSource by search string - bound to itemscontrol (WPF MVVM)
Is there a way I can filter the CollectionViewSource
to only show games in the ItemsSource
which "Title" contains the "searchString"?有没有办法可以过滤CollectionViewSource
以仅显示“标题”包含“searchString”的ItemsSource
中的游戏?
In my PosterView
I have this CVS:在我的PosterView
我有这个 CVS:
<CollectionViewSource x:Key="GameListCVS"
Source="{Binding PosterView}"
Filter="GameSearchFilter">
<CollectionViewSource.SortDescriptions>
<scm:SortDescription PropertyName="Title" />
</CollectionViewSource.SortDescriptions>
</CollectionViewSource>
and also this ItemsControl
还有这个ItemsControl
<ItemsControl x:Name="gameListView"
ItemsSource="{Binding Source={StaticResource GameListCVS}}">
My MainWindow.xaml contains the search box which can successfully pass the searchString (string containing what is in the search box) to PosterView
.我MainWindow.xaml包含了搜索框,可以顺利通过搜索字符串(含是什么在搜索框中输入字符串) PosterView
。
PosterView
binding is actually (confusingly, I know), an ObservableCollection
PosterView
绑定实际上是(令人困惑,我知道),一个ObservableCollection
public ObservableCollection<GameList> PosterView { get; set; }
And here is how games are added to the ObservableCollection
以下是将游戏添加到ObservableCollection
games.Add(new GameList
{
Title = columns[0],
Genre = columns[1],
Path = columns[2],
Link = columns[3],
Icon = columns[4],
Poster = columns[5],
Banner = columns[6],
Guid = columns[7]
});
If you are creating the CollectionViewSource
in the view, you should filter it there as well:如果你在视图中创建CollectionViewSource
,你也应该在那里过滤它:
private void GameSearchFilter(object sender, FilterEventArgs e)
{
GameList game = e.Item as GameList;
e.Accepted = game != null && game.Title?.Contains(txtSearchString.Text);
}
The other option would be to bind to an ICollectionView
and filter this one in the view model:另一种选择是绑定到ICollectionView
并在视图模型中过滤这个:
_view = CollectionViewSource.GetDefaultView(sourceCollection);
_view.Filter = (obj) =>
{
GameList game = obj as GameList;
return game != null && game.Title?.Contains(_searchString);
};
...
public string SearchString
{
...
set { _searchString = value; _view.Refresh(); }
}
Or sort the source collection itself directly.或者直接对源集合本身进行排序。
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