C1.DataCollection 8.0.20241.197

About

The ComponentOne DataCollection library includes a series of cross-platform observable collections with features like sorting, grouping and filtering and data virtualization techniques like cursor and pagination.

Commonly Used Types:

• C1.DataCollection.C1DataCollection
• C1.DataCollection.C1VirtualDataCollection
• C1.DataCollection.C1CursorDataCollection
• C1.DataCollection.C1PagedDataCollection

In-memory Data Collections

C1DataCollection is the main class used to sort, filter and group any in memory collection like lists, arrays or observable collection

var collection = new ObservableCollection<Item>();
var dc = new C1DataCollection<Item>(collection);
await dc.SortAsync("Property1", "Property2");

All the data-collections implement INotifyCollectionChanged, when a change happens in the underlying ObservableCollection, the change will be reflected and notified immediatly in the data-collection.

Similarly, the C1DataCollection can be grouped and filtered

var collection = new ObservableCollection<Item>();
var dc = new C1DataCollection<Item>(collection);
await dc.GroupAsync("Property1");

var collection = new ObservableCollection<Item>();
var dc = new C1DataCollection<Item>(collection);
await dc.FilterAsync("Property1", FilterOperation.Contains, "X");

Virtualizing Data Collections

C1VirtualDataCollection and C1CursorDataCollection are two abstract collection that can be used to implement collection whose items are pulled on demand from an external source, typically a network call.

public class YouTubeCollectionView : C1CursorDataCollection<YouTubeVideo>
{
    protected override async Task<Tuple<string, IReadOnlyList<YouTubeVideo>>> GetPageAsync(int startingIndex, string pageToken, int? count = null, IReadOnlyList<SortDescription> sortDescriptions = null, FilterExpression filterExpresssion = null, CancellationToken cancellationToken = default(CancellationToken))
    {
        var client = new HttpClient();
        var response = await client.GetAsync(youtubeUrl, cancellationToken);
        var videos = new List<YouTubeVideo>();
        var serializer = new DataContractJsonSerializer(typeof(YouTubeSearchResult));
        var result = serializer.ReadObject(await response.Content.ReadAsStreamAsync()) as YouTubeSearchResult;
        foreach (var item in result.Items)
        {
            videos.Add(new YouTubeVideo(item));
        }
        return new Tuple<string, IReadOnlyList<YouTubeVideo>>(result.NextPageToken, videos);
    }
}

Composition Data Collections

There are a series of data collections that can be used to compose other collections

• C1PagedDataCollection
• C1SequenceDataCollection
• C1SelectDataCollection
• C1SelectManyDataCollection
• C1CacheDataCollection
• C1EditableDataCollection
• C1SpanDataCollection

Extensions

Built-in extensions ease the creation of data collections from know sources like EntityFrameworkCore, Ado.Net and BindingList.

• C1.DataCollection.EntityFrameworkCore
• C1.DataCollection.AdoNet
• C1.DataCollection.BindingList

Adapters

Built-in adapters are used to binding data-collections to native controls.

• C1.Win.DataCollection
• C1.WPF.DataCollection
• C1.Android.DataCollection
• C1.iOS.DataCollection
• C1.Mac.DataCollection
• C1.UWP.DataCollection

Serialization

C1.DataCollection.Serialization includes System.Text.Json converters to serialize and deserialize filter, sort and notification classes to Json.

Resources

• Samples
• Documentation
• Licensing