如何观察事件的特定组合？

Question

I have multiple observables made with Rx's FromEventPattern , eg:

var a = Observable.FromEventPattern(...); // event A
var b = Observable.FromEventPattern(...); // event B
var c = Observable.FromEventPattern(...); // event C

How do I observe specific sequences of these events?

Eg, I want to observe the case when A then C happened, but without B in between, in a particular limited time frame.

Or: ABC then ABC then just B.

Answer 1

Does this work for you?

var query = a.Select(_ => c.TakeUntil(b)).Switch();

---

Would this work for the 5 second time period?

var query = a
    .Select(_ => c
        .TakeUntil(b)
        .TakeUntil(Observable.Timer(TimeSpan.FromSeconds(5.0))))
    .Switch();

Otherwise you'd need to look at the Window or Join operators.