WPF列表视图查询
查询方法
ICollectionView _collectionView = CollectionViewSource.GetDefaultView(DataItems);
if (_collectionView == null)
{return ;
}
_collectionView.Filter = item => item is MetadataItemVO vo && vo.Name.Contains(SearchText, StringComparison.OrdinalIgnoreCase);
源码
View
<DockPanel Margin="0,0,100,0"><TextBlock VerticalAlignment="Center" Text="元数据项：" /><ButtonMargin="10,3,0,3"Command="{Binding ResetSearchCommand}"DockPanel.Dock="Right"Content="重置" /><ButtonMargin="10,3,0,3"Command="{Binding SearchCommand}"DockPanel.Dock="Right"Content="查询" /><TextBoxMargin="0,3"VerticalContentAlignment="Center"Text="{Binding SearchText, Mode=TwoWay}" />
</DockPanel>
Model
public partial class MetadataItemVO
{public string Id { get; set; }public string Name { get; set; }public string Description { get; set; }
}
ViewModel
private ObservableCollection<MetadataItemVO> _dataItems;
public ObservableCollection<MetadataItemVO> DataItems
{get { return _dataItems; }set { SetProperty(ref _dataItems, value); }
}private string _searchText;
public string SearchText
{get { return _searchText; }set { SetProperty(ref _searchText, value); }
}public ICommand ResetSearchCommand { get; set; }
public ICommand SearchCommand { get; set; }private void InitCommands()
{ResetSearchCommand = new RelayCommand(ResetSearch);SearchCommand = new RelayCommand(Search);
}private void ResetSearch()
{ICollectionView _collectionView = CollectionViewSource.GetDefaultView(DataItems);if (_collectionView == null){return ;}_collectionView.Filter = item => true;
}private void Search()
{ICollectionView _collectionView = CollectionViewSource.GetDefaultView(DataItems);if (_collectionView == null){return ;}_collectionView.Filter = item => item is MetadataItemVO vo && vo.Name.Contains(SearchText, StringComparison.OrdinalIgnoreCase);
}
)
