Question

我有一个客户MyClient，该客户通过IObservable提供了新的状态。如文档（https://reactiveui.net/docs/handbook/view-models/boilerplate-code中所述，我制作了一个ObservableAsProperty类型的私有属性来获取IObservable的输出。但要知道我的GUI不会根据更改自动更新。

public partial class MainWindow : ReactiveWindow<AppViewModel>
{
    public MainWindow()
    {
        InitializeComponent();
        ViewModel = App.Container.GetInstance<AppViewModel>();
        this.WhenActivated(r =>
            {
                this.OneWayBind(ViewModel, viewModel => viewModel.Status.AoiStatus, view => view.StatusTxtbl.Text).DisposeWith(r);
            });
    }
}

public class AppViewModel : ReactiveObject
{

    public IStatus Status { [ObservableAsProperty] get; }

    public MyClient Client { get; }

    public AppViewModel(MyClient client)
    {
        Client = client;
        Client.StatusStream().ToPropertyEx(this, x => x.Status);
    }
}

public interface IStatus
{
    string AoiStatus { get; }
}

如果我通过xaml将gui与DataContext绑定在一起，那么一切都会按预期进行。 ViewModel.PropertyChanged被解雇了，所以我不知道那是怎么回事？！

public partial class MainWindow : ReactiveWindow<AppViewModel>
{
    public MainWindow()
    {
        InitializeComponent();
        ViewModel = App.Container.GetInstance<AppViewModel>();
        DataContext = this;
    }
}

public class AppViewModel : ReactiveObject
{

    public IStatus Status { [ObservableAsProperty] get; }

    public MyClient Client { get; }

    public AppViewModel(MyClient client)
    {
        Client = client;
        Client.StatusStream().ToPropertyEx(this, x => x.Status);
    }
}

public interface IStatus
{
    string AoiStatus { get; }
}

<TextBlock>
    <Run Text="Status:" />
    <Run Text="{Binding ViewModel.Status.AoiStatus, Mode=OneWay}"/>
</TextBlock>

Answer 1

如果您在调度程序线程上观察流，应该可以工作：

public AppViewModel(MyClient client)
{
    Client = client;
    Client.StatusStream().ObserveOnDispatcher().ToPropertyEx(this, x => x.Status);
}

RX：'ObservableAsProperty'绑定的属性不会在gui上自动更新

1 个答案: