Data Sources Tutorials

// This sample uses Enumerable.Repeat, which needs this namespace
using System.Linq;

public class ListMultiStream : Custom.DataSource.DataSource16
{
  public ListMultiStream(MyServices services) : base(services)
  {
    // First stream "Settings" containing just one item
    ProvideOut(() => new {
      Title = "Settings Entity",
      PageSize = 50,
      ShowStuff = true,
    }, name: "Settings");

    // A second stream on the normal (unnamed) "Default"
    ProvideOut(() => Enumerable.Range(1, 5).Select(i => new {
        Id = i,
        guid = System.Guid.NewGuid(),
        Title = "Hello from ListMultiStream",
        FavoriteNumber = 2742,
      })
    );
  }
}

@{
  // Create the Dynamic DataSource with the name "ListMultiStream"
  var multiStream = Kit.Data.GetSource(name: "ListMultiStream");
  var settings = AsDynamic(multiStream["Settings"].List.FirstOrDefault());
}
<h3>Data in the stream "Settings"</h3>
<ul>
  <li>PageSize: @settings.PageSize</li>
  <li>ShowStuff: @settings.ShowStuff</li>
</ul>
<h3>List of Data in the Default stream (@multiStream.List.Count())</h3>
<ul>
  @foreach (var item in AsList(multiStream)) {
    <li>
      <strong>@item.Title</strong> (@item.EntityId / @item.EntityGuid) - Fav Number: @item.FavoriteNumber
    </li>
  }
</ul>

using System.Linq;

public class SplitOddEven : Custom.DataSource.DataSource16
{
  public SplitOddEven(MyServices services) : base(services)
  {
    ProvideOut(() => TryGetIn());
    ProvideOut(() => Split().Odd, name: "Odd");
    ProvideOut(() => Split().Even, name: "Even");
  }

  private Cache Split() {
    // If already cached (eg. it's retrieving Even after Odd was already retrieved), return cache
    if (_cache != null)
      return _cache;

    // Make sure we have an In stream - otherwise return an error
    var inStream = TryGetIn();
    if (inStream == null) return new Cache { Odd = Error.TryGetInFailed(), Even = Error.TryGetInFailed() };

    // Build cache so we don't have to re-calculate when retrieving other streams
    return _cache = new Cache {
      Odd = inStream.Where(e => e.EntityId % 2 == 1),
      Even = inStream.Where(e => e.EntityId % 2 == 0)
    };
  }

  private Cache _cache;

  private class Cache {
    public object Odd;
    public object Even;
  }
}

@{
  var oddEven = Kit.Data.GetSource(name: "SplitOddEven", attach: App.Data["Persons"]);
  var all = oddEven.List;
  var odd = oddEven["Odd"].List;
  var even = oddEven["Even"].List;
}
<h3>List of Data in the All stream (@all.Count())</h3>
<ul>
  @foreach (var item in AsList(all)) {
    <li>
      <strong>@item.EntityTitle</strong> (#@item.EntityId)
    </li>
  }
</ul>
<h3>List of Data in the Odd stream (@odd.Count())</h3>
<ul>
  @foreach (var item in AsList(odd)) {
    <li>
      <strong>@item.EntityTitle</strong> (#@item.EntityId)
    </li>
  }
</ul>
<h3>List of Data in the Even stream (@even.Count())</h3>
<ul>
  @foreach (var item in AsList(even)) {
    <li>
      <strong>@item.EntityTitle</strong> (#@item.EntityId)
    </li>
  }
</ul>