ActionBlock<TInput> Classe

Définition

generic <typename TInput>
public ref class ActionBlock sealed : System::Threading::Tasks::Dataflow::ITargetBlock<TInput>

public sealed class ActionBlock<TInput> : System.Threading.Tasks.Dataflow.ITargetBlock<TInput>

type ActionBlock<'Input> = class
    interface ITargetBlock<'Input>
    interface IDataflowBlock

type ActionBlock<'Input> = class
    interface IDataflowBlock
    interface ITargetBlock<'Input>

Public NotInheritable Class ActionBlock(Of TInput)
Implements ITargetBlock(Of TInput)

Paramètres de type

Héritage

Object

ActionBlock<TInput>

Implémente

IDataflowBlock ITargetBlock<TInput>

Exemples

L’exemple suivant montre l’utilisation de la ActionBlock<TInput> classe pour effectuer plusieurs calculs à l’aide de blocs de flux de données et retourne le temps écoulé nécessaire pour effectuer les calculs. Cet exemple de code fait partie d’un exemple plus large fourni pour l’article How to: Specify the Degree of Parallelism in a Dataflow Block article.

// 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

Remarques

Constructeurs

Propriétés

Méthodes

Implémentations d’interfaces explicites

Méthodes d’extension

S’applique à