C# AsyncSubject类代码示例

        public void each_subscriber_is_scheduled_individually()
        {
            ManualScheduler scheduler = new ManualScheduler();

            AsyncSubject<int> subject = new AsyncSubject<int>(scheduler);

            StatsObserver<int> statsA = new StatsObserver<int>();
            StatsObserver<int> statsB = new StatsObserver<int>();

            subject.OnNext(1);
            subject.OnNext(2);
            subject.OnNext(3);
            subject.OnCompleted();

            subject.Subscribe(statsA);
            subject.Subscribe(statsB);

            scheduler.RunNext();

            Assert.IsTrue(statsA.NextCalled);
            Assert.IsFalse(statsB.NextCalled);

            scheduler.RunNext();

            Assert.IsTrue(statsB.NextCalled);
        }

        public static IObservable<Unit> WriteAsync(this Stream This, byte[] data, int start, int length)
        {
            var ret = new AsyncSubject<Unit>();

            try
            {
                This.BeginWrite(data, start, length, result =>
                {
                    try
                    {
                        This.EndWrite(result);
                        ret.OnNext(Unit.Default);
                        ret.OnCompleted();
                    }
                    catch (Exception ex)
                    {
                        ret.OnError(ex);
                    }
                }, null);
            }
            catch (Exception ex)
            {
                ret.OnError(ex);
            }

            return ret;
        }

        public void PhotosGetCountsAsyncTest()
        {
            DateTime date1 = DateTime.Today.AddMonths(-12);
            DateTime date2 = DateTime.Today.AddMonths(-6);
            DateTime date3 = DateTime.Today;

            DateTime[] uploadDates = new DateTime[] { date1, date2, date3 };

            Flickr f = TestData.GetAuthInstance();

            var w = new AsyncSubject<FlickrResult<PhotoCountCollection>>();
            f.PhotosGetCountsAsync(uploadDates, false, r => { w.OnNext(r); w.OnCompleted(); });
            var result = w.Next().First();

            Assert.IsFalse(result.HasError);

            var counts = result.Result;

            Assert.AreEqual(2, counts.Count, "Should be two counts returned.");

            var count1 = counts[0];

            Assert.AreEqual(date1, count1.FromDate);
            Assert.AreEqual(date2, count1.ToDate);

            var count2 = counts[1];
            Assert.AreEqual(date2, count2.FromDate);
            Assert.AreEqual(date3, count2.ToDate);
        }

        public void UploadPictureAsyncBasicTest()
        {
            Flickr f = TestData.GetAuthInstance();

            var w = new AsyncSubject<FlickrResult<string>>();

            byte[] imageBytes = TestData.TestImageBytes;
            var s = new MemoryStream(imageBytes);
            s.Position = 0;

            string title = "Test Title";
            string desc = "Test Description\nSecond Line";
            string tags = "testtag1,testtag2";

            f.UploadPictureAsync(s, "Test.jpg", title, desc, tags, false, false, false, ContentType.Other, SafetyLevel.Safe, HiddenFromSearch.Visible,
                r => { w.OnNext(r); w.OnCompleted(); });

            var result = w.Next().First();

            if (result.HasError)
            {
                throw result.Error;
            }

            Assert.IsNotNull(result.Result);
            Console.WriteLine(result.Result);

            // Clean up photo
            f.PhotosDelete(result.Result);
        }

        public void PhotosetsGeneralAsyncTest()
        {
            Flickr f = TestData.GetAuthInstance();

            var photoId1 = "7519320006"; // Tree/Write/Wall
            var photoId2 = "7176125763"; // Rainbow Rose

            var w = new AsyncSubject<FlickrResult<Photoset>>();
            f.PhotosetsCreateAsync("Test Photoset", photoId1, r => { w.OnNext(r); w.OnCompleted(); });

            var photosetResult = w.Next().First();
            Assert.IsFalse(photosetResult.HasError);
            var photoset = photosetResult.Result;

            try
            {
                var w2 = new AsyncSubject<FlickrResult<NoResponse>>();
                f.PhotosetsEditMetaAsync(photoset.PhotosetId, "New Title", "New Description", r => { w2.OnNext(r); w2.OnCompleted(); });
                var noResponseResult = w2.Next().First();
                Assert.IsFalse(noResponseResult.HasError);

                var w3 = new AsyncSubject<FlickrResult<NoResponse>>();
                f.PhotosetsAddPhotoAsync(photoset.PhotosetId, photoId2, r => { w3.OnNext(r); w3.OnCompleted(); });

                noResponseResult = w3.Next().First();
                Assert.IsFalse(noResponseResult.HasError);
            }
            finally
            {
                var w4 = new AsyncSubject<FlickrResult<NoResponse>>();
                // Clean up and delete photoset
                f.PhotosetsDeleteAsync(photoset.PhotosetId, r => { w4.OnNext(r); w4.OnCompleted(); });
                var noResponseResult = w4.Next().First();
            }
        }

        private IObservable<string> detect(string text)
        {
            var subject = new AsyncSubject<string>();
            string detectUri = String.Format(GetDetectUri(text), appId, HttpUtility.HtmlEncode(text));

            var wc = new WebClient();
            wc.OpenReadCompleted += new OpenReadCompletedEventHandler((obj, args) =>
            {
                if (args.Error != null)
                {
                    subject.OnError(args.Error);
                }
                else
                {
                    if (!args.Cancelled)
                    {
                        var xdoc = XDocument.Load(args.Result);
                        subject.OnNext(xdoc.Root.Value);
                    }
                    subject.OnCompleted();
                }
            });
            wc.OpenReadAsync(new Uri(detectUri));
            return subject;
        }

        public void PhotosetsGetContextAsyncTest()
        {
            Flickr f = TestData.GetInstance();

            var photosetId = "72157626420254033"; // Beamish
            var photos = f.PhotosetsGetPhotos(photosetId, 1, 100);
            var firstPhoto = photos.First();
            var lastPhoto = photos.Last();

            var w = new AsyncSubject<FlickrResult<Context>>();

            f.PhotosetsGetContextAsync(firstPhoto.PhotoId, photosetId, r => { w.OnNext(r); w.OnCompleted(); });
            var result = w.Next().First();

            Assert.IsFalse(result.HasError);

            var context = result.Result;

            Assert.IsNull(context.PreviousPhoto, "As this is the first photo the previous photo should be null.");
            Assert.IsNotNull(context.NextPhoto, "As this is the first photo the next photo should not be null.");

            w = new AsyncSubject<FlickrResult<Context>>();

            f.PhotosetsGetContextAsync(lastPhoto.PhotoId, photosetId, r => { w.OnNext(r); w.OnCompleted(); });
            result = w.Next().First();

            Assert.IsFalse(result.HasError);

            context = result.Result;

            Assert.IsNull(context.NextPhoto, "As this is the last photo the next photo should be null.");
            Assert.IsNotNull(context.PreviousPhoto, "As this is the last photo the previous photo should not be null.");
        }

        public JobHost()
        {
            // Job container.
            Jobs = new Dictionary<string, Job>();

            // Signal 
            _shutdownSignal = new AsyncSubject<Unit>();
            _shutdownSignal.OnNext(Unit.Default);
        }

 ///<summary>
 ///With AsyncSubject<T> ,the subscriber will only get all the last publication made.
 ///Simply, AsyncSubject has a one value buffer. The publication is made only on the OnCompleted() call.
 ///</summary>
 private static void AsyncSubject()
 {
     var subject = new AsyncSubject<string>();
         subject.OnNext("a");
         subject.OnNext("b");
         subject.OnNext("c");
         subject.Subscribe(Console.WriteLine);
         subject.OnCompleted();
 }

        static IEnumerable<Task> CreateConnectableObservables()
        {
            var subject = new AsyncSubject<Unit>();

            yield return Observable.Defer(() => Observable.Start(() => Unit.Default))
                .Multicast(subject)
                .RefCount()
                .ToTask();
        }

        public void PhotosGetExifAsyncTest()
        {
            Flickr f = TestData.GetInstance();

            var w = new AsyncSubject<FlickrResult<ExifTagCollection>>();
            f.PhotosGetExifAsync(TestData.PhotoId, r => { w.OnNext(r); w.OnCompleted(); });
            var result = w.Next().First();

            Assert.IsFalse(result.HasError);
        }

 public static void Run()
 {
     var subject = new AsyncSubject<string>();
       subject.OnNext("a");
       WriteSequenceToConsole(subject);
       subject.OnNext("b");
       subject.OnNext("c");
       // subject.OnCompleted();
       Console.ReadLine();
 }

        public void Infinite()
        {
            var scheduler = new TestScheduler();

            var xs = scheduler.CreateHotObservable(
                OnNext(70, 1),
                OnNext(110, 2),
                OnNext(220, 3),
                OnNext(270, 4),
                OnNext(340, 5),
                OnNext(410, 6),
                OnNext(520, 7),
                OnNext(630, 8),
                OnNext(710, 9),
                OnNext(870, 10),
                OnNext(940, 11),
                OnNext(1020, 12)
            );

            var subject = default(AsyncSubject<int>);
            var subscription = default(IDisposable);

            var results1 = scheduler.CreateObserver<int>();
            var subscription1 = default(IDisposable);

            var results2 = scheduler.CreateObserver<int>();
            var subscription2 = default(IDisposable);

            var results3 = scheduler.CreateObserver<int>();
            var subscription3 = default(IDisposable);

            scheduler.ScheduleAbsolute(100, () => subject = new AsyncSubject<int>());
            scheduler.ScheduleAbsolute(200, () => subscription = xs.Subscribe(subject));
            scheduler.ScheduleAbsolute(1000, () => subscription.Dispose());

            scheduler.ScheduleAbsolute(300, () => subscription1 = subject.Subscribe(results1));
            scheduler.ScheduleAbsolute(400, () => subscription2 = subject.Subscribe(results2));
            scheduler.ScheduleAbsolute(900, () => subscription3 = subject.Subscribe(results3));

            scheduler.ScheduleAbsolute(600, () => subscription1.Dispose());
            scheduler.ScheduleAbsolute(700, () => subscription2.Dispose());
            scheduler.ScheduleAbsolute(800, () => subscription1.Dispose());
            scheduler.ScheduleAbsolute(950, () => subscription3.Dispose());

            scheduler.Start();

            results1.Messages.AssertEqual(
            );

            results2.Messages.AssertEqual(
            );

            results3.Messages.AssertEqual(
            );
        }

        public void PhotosGetContactsPhotosAsyncTest()
        {
            var w = new AsyncSubject<FlickrResult<PhotoCollection>>();
            AuthInstance.PhotosGetContactsPhotosAsync(50, true, true, true, PhotoSearchExtras.All, r => { w.OnNext(r); w.OnCompleted(); });
            var result = w.Next().First();

            Assert.IsFalse(result.HasError);
            Assert.IsNotNull(result.Result);

            Assert.IsTrue(result.Result.Count > 0, "Should return some photos.");
        }

        public void PhotosAddTagTest()
        {
            string photoId = "4499284951";
            string tag = "testx";

            var w = new AsyncSubject<FlickrResult<NoResponse>>();

            AuthInstance.PhotosAddTagsAsync(photoId, tag, r => { w.OnNext(r); w.OnCompleted(); });

            var result = w.Next().First();
        }