Question

我有一个对象可以解析大量实时数据，然后在数据发生变化时触发事件。有时，实时数据可能会失去同步，当检测到这些数据时，它会创建一个新对象实例，以便将所有内容同步备份。

我运行一个监视器线程，确保更新正在进行。它看起来像这样：

private async Task DesyncMonitorThread()
{
    while (true)
    {
        if ((DateTime.Now - _lastOrderBookChange) > TimeSpan.FromSeconds(30))
        {
            Console.WriteLine("No order book activity in 30 seconds. Dispatching desync handler.");
            _lastOrderBookChange = DateTime.Now;
            OnDesyncDetected(this, new EventArgs());
        }
        await Task.Delay(1000);
    }
}

OnDesyncDetected方法：

private void OnDesyncDetected(object sender, EventArgs e)
{
    //Unsubscribe
    Console.WriteLine("Desync detected. Resyncing order book and prediction engine.");
    if (_book != null)
    {
        _book.OrderBookChanged -= OnBookChange;
        _book.DesyncDetected -= OnDesyncDetected;
    }

    if (_predictor != null)
        _predictor.PredictionChanged -= OnNewPrediction;

    _book = new RealtimeOrderBook(_productId);
    _predictor = new MarketPredictor(_book, Settings.PredictorSettings);

    _book.OrderBookChanged += OnBookChange;
    _book.DesyncDetected += OnDesyncDetected;
    _predictor.PredictionChanged += OnNewPrediction;
}

创建新对象可以正常工作，并且Book和_predictor新实例中订阅的事件将按预期触发。但是，事件处理程序OnBookChange，DesyncDetected和OnNewPrediction不会。

我想假设这与订阅错误的对象有关，但我无法弄清楚原因。可能是因为这发生在另一个线程上吗？

Answer 1

应手动触发自定义事件，因此您可以通过

触发OrderBookChanged，DesyncDetected，PredictionChanged事件

    _book = new RealtimeOrderBook(_productId);
    _predictor = new MarketPredictor(_book, Settings.PredictorSettings);

    _book.OrderBookChanged += OnBookChange;
    _book.DesyncDetected += OnDesyncDetected;
    _predictor.PredictionChanged += OnNewPrediction;

    _book.OrderBookChanged(_book,new EventArgs());
    _book.DesyncDetected(_book,new EventArgs());
    _predictor.PredictionChanged(_predictor,new EventArgs());

或直接调用方法

    _book = new RealtimeOrderBook(_productId);
    _predictor = new MarketPredictor(_book, Settings.PredictorSettings);
    _book.OnBookChange(para);
    _book.OndesyncDetected(para);
    _predictor.OnNewPrediction(para);

C＃事件没有为新对象触发

1 个答案: