ActionBlock<TInput>.Post(TInput) Yöntem

Tanım

Ad Alanı:

System.Threading.Tasks.Dataflow

Bütünleştirilmiş Kod:

System.Threading.Tasks.Dataflow.dll

Paket:

System.Threading.Tasks.Dataflow v9.0.0-preview.6.24327.7

Kaynak:

ActionBlock.cs

Bir öğeyi hedef veri akışı bloğuna postalar.

public:
 bool Post(TInput item);

public bool Post (TInput item);

member this.Post : 'Input -> bool

Public Function Post (item As TInput) As Boolean

Parametreler

item

TInput

Hedefe sunulan öğe.

Döndürülenler

Boolean

true öğe veri akışı bloğuna gönderiliyorsa; aksi takdirde , false.

Örnekler

Aşağıdaki örnekte, hedef veri akışı bloğuna Post bir öğe göndermek için yönteminin nasıl kullanılacağı gösterilmektedir. Bu kod örneği, Nasıl yapılır: Veri Akışı Bloğunda Paralellik Derecesini Belirtme konusu için sağlanan daha büyük bir örneğin bir parçasıdır.

// Performs several computations by using dataflow and returns the elapsed
// time required to perform the computations.
static TimeSpan TimeDataflowComputations(int maxDegreeOfParallelism,
   int messageCount)
{
   // Create an ActionBlock<int> that performs some work.
   var workerBlock = new ActionBlock<int>(
      // Simulate work by suspending the current thread.
      millisecondsTimeout => Thread.Sleep(millisecondsTimeout),
      // Specify a maximum degree of parallelism.
      new ExecutionDataflowBlockOptions
      {
         MaxDegreeOfParallelism = maxDegreeOfParallelism
      });

   // Compute the time that it takes for several messages to
   // flow through the dataflow block.

   Stopwatch stopwatch = new Stopwatch();
   stopwatch.Start();

   for (int i = 0; i < messageCount; i++)
   {
      workerBlock.Post(1000);
   }
   workerBlock.Complete();

   // Wait for all messages to propagate through the network.
   workerBlock.Completion.Wait();

   // Stop the timer and return the elapsed number of milliseconds.
   stopwatch.Stop();
   return stopwatch.Elapsed;
}

' Demonstrates how to specify the maximum degree of parallelism 
' when using dataflow.
Friend Class Program
   ' Performs several computations by using dataflow and returns the elapsed
   ' time required to perform the computations.
   Private Shared Function TimeDataflowComputations(ByVal maxDegreeOfParallelism As Integer, ByVal messageCount As Integer) As TimeSpan
      ' Create an ActionBlock<int> that performs some work.
      Dim workerBlock = New ActionBlock(Of Integer)(Function(millisecondsTimeout) Pause(millisecondsTimeout), New ExecutionDataflowBlockOptions() With { .MaxDegreeOfParallelism = maxDegreeOfParallelism})
         ' Simulate work by suspending the current thread.
         ' Specify a maximum degree of parallelism.

      ' Compute the time that it takes for several messages to 
      ' flow through the dataflow block.

      Dim stopwatch As New Stopwatch()
      stopwatch.Start()

      For i As Integer = 0 To messageCount - 1
         workerBlock.Post(1000)
      Next i
      workerBlock.Complete()

      ' Wait for all messages to propagate through the network.
      workerBlock.Completion.Wait()

      ' Stop the timer and return the elapsed number of milliseconds.
      stopwatch.Stop()
      Return stopwatch.Elapsed
   End Function

   Private Shared Function Pause(ByVal obj As Object)
      Thread.Sleep(obj)
      Return Nothing
   End Function