What is the proper way to update multiple properties from a ReactiveCommand?

[Atle]

Hi,

I have this command:

CreateSeries = ReactiveCommand.CreateAsyncTask(async _ =>

{

 var someInput = MayChangeWhileThisIsRunningProperty;

 string title = CreateTitle(someInput);

 var data = await GetDataAsync(someInput); <-- must create this here and not in the subscription since the property may change

 List<IChartSeriesViewModel> chartViewModels = CreateViewModels(data);

 return Tuple.Create(chartViewModels , title);

}

Then the result of this should update a bunch of properties:

_series = CreateSeries.ObserveOn(RxApp.MainThreadScheduler)

                                 .Select(x => new ObservableCollection<IChartSeriesViewModel>(x.Item1))

                                 .ToProperty(this, x => x.SeriesCollection);

_yRange = CreateSeries.ObserveOn(RxApp.MainThreadScheduler)

                                   .Select(x => CalculateYRange(x.Item1))

                                   .ToProperty(this, x => x.YRange);

_title = CreateSeries.Select(x => x.Item2)

                              .ObserveOn(RxApp.MainThreadScheduler)

                              .ToProperty(this, x => x.Title);

However, this feels a bit ineffective adding 3 subscriptions to a single command's results. Should all these be set at the bottom of the command's expression instead of returning the view models and the plot title?

- Atle

[paul....@gmail.com]

Hey Atle,

Nope, that looks fine to me. You don’t need the ObserveOns though.

Best,

Paul

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