.Net中偶尔需要使用异步的处理

我们知道程序中使用异步、多线程会提高程序的响应速度，但也不能无限使用多线程，这在高峰会造成系统cpu上升，系统卡顿，这就需要我们自己来控制开启的线程数，不多说看代码。

        private static int threadCountByOrderId = 0;
        private static int maxThreadCountByOrderId = 30;
        public bool dealorder(int OrderId)
        {
            var threadNumber = Interlocked.Exchange(ref threadCountByOrderId, threadCountByOrderId);
            if (threadCountByOrderId > maxThreadCountByOrderId)
            {
                return OrderChangePushToBigDataImpService.PushOrderToBigData(OrderId, Logger);
            }
            else
            {
                Task.Factory.StartNew(() =>
                {
                    Interlocked.Increment(ref threadCountByOrderId);
                    try
                    {
                        using (var context = MefInjectionProvider.CreateContext())
                        {
                            var NewOrderChangePushToBigDataImpService = context.Value.GetExport<IOrderChangePushToBigDataImpService>();
                            NewOrderChangePushToBigDataImpService.PushOrderToBigData(OrderId, Logger);
                        }
                    }
                    finally
                    {
                        Interlocked.Decrement(ref threadCountByOrderId);
                    }
                });
                return true;
            }

        }

这样就能控制线程数据了