ActionBlock<TInput> Constructors
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ActionBlock<TInput>(Action<TInput>) |
Initializes a new instance of the ActionBlock<TInput> class with the specified action. |
ActionBlock<TInput>(Func<TInput,Task>) |
Initializes a new instance of the ActionBlock<TInput> class with the specified action. |
ActionBlock<TInput>(Action<TInput>, ExecutionDataflowBlockOptions) |
Initializes a new instance of the ActionBlock<TInput> class with the specified action and configuration options. |
ActionBlock<TInput>(Func<TInput,Task>, ExecutionDataflowBlockOptions) |
Initializes a new instance of the ActionBlock<TInput> class with the specified action and configuration options. |
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
Initializes a new instance of the ActionBlock<TInput> class with the specified action.
public:
ActionBlock(Action<TInput> ^ action);
public ActionBlock (Action<TInput> action);
new System.Threading.Tasks.Dataflow.ActionBlock<'Input> : Action<'Input> -> System.Threading.Tasks.Dataflow.ActionBlock<'Input>
Public Sub New (action As Action(Of TInput))
Parameters
- action
- Action<TInput>
The action to invoke with each data element received.
Exceptions
action
is null
.
Applies to
.NET 9 和其他版本
产品 | 版本 |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8 (package-provided), 8, 9 (package-provided), 9 |
.NET Framework | 4.7 (package-provided), 4.7.1 (package-provided), 4.7.2 (package-provided), 4.8 (package-provided) |
.NET Standard | 2.0 (package-provided), 2.1 (package-provided) |
UWP | 10.0 |
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
Initializes a new instance of the ActionBlock<TInput> class with the specified action.
public:
ActionBlock(Func<TInput, System::Threading::Tasks::Task ^> ^ action);
public ActionBlock (Func<TInput,System.Threading.Tasks.Task> action);
new System.Threading.Tasks.Dataflow.ActionBlock<'Input> : Func<'Input, System.Threading.Tasks.Task> -> System.Threading.Tasks.Dataflow.ActionBlock<'Input>
Public Sub New (action As Func(Of TInput, Task))
Parameters
Exceptions
action
is null
.
Applies to
.NET 9 和其他版本
产品 | 版本 |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8 (package-provided), 8, 9 (package-provided), 9 |
.NET Framework | 4.7 (package-provided), 4.7.1 (package-provided), 4.7.2 (package-provided), 4.8 (package-provided) |
.NET Standard | 2.0 (package-provided), 2.1 (package-provided) |
UWP | 10.0 |
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
Initializes a new instance of the ActionBlock<TInput> class with the specified action and configuration options.
public:
ActionBlock(Action<TInput> ^ action, System::Threading::Tasks::Dataflow::ExecutionDataflowBlockOptions ^ dataflowBlockOptions);
public ActionBlock (Action<TInput> action, System.Threading.Tasks.Dataflow.ExecutionDataflowBlockOptions dataflowBlockOptions);
new System.Threading.Tasks.Dataflow.ActionBlock<'Input> : Action<'Input> * System.Threading.Tasks.Dataflow.ExecutionDataflowBlockOptions -> System.Threading.Tasks.Dataflow.ActionBlock<'Input>
Public Sub New (action As Action(Of TInput), dataflowBlockOptions As ExecutionDataflowBlockOptions)
Parameters
- action
- Action<TInput>
The action to invoke with each data element received.
- dataflowBlockOptions
- ExecutionDataflowBlockOptions
The options with which to configure this ActionBlock<TInput>.
Exceptions
Examples
The following example shows how to use the ActionBlock<TInput>(Action<TInput>, ExecutionDataflowBlockOptions) constructor to create a new ActionBlock<TInput> object. This code example is part of a larger example provided for the How to: Specify the Degree of Parallelism in a Dataflow Block topic.
// 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
Applies to
.NET 9 和其他版本
产品 | 版本 |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8 (package-provided), 8, 9 (package-provided), 9 |
.NET Framework | 4.7 (package-provided), 4.7.1 (package-provided), 4.7.2 (package-provided), 4.8 (package-provided) |
.NET Standard | 2.0 (package-provided), 2.1 (package-provided) |
UWP | 10.0 |
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
- Source:
- ActionBlock.cs
Initializes a new instance of the ActionBlock<TInput> class with the specified action and configuration options.
public:
ActionBlock(Func<TInput, System::Threading::Tasks::Task ^> ^ action, System::Threading::Tasks::Dataflow::ExecutionDataflowBlockOptions ^ dataflowBlockOptions);
public ActionBlock (Func<TInput,System.Threading.Tasks.Task> action, System.Threading.Tasks.Dataflow.ExecutionDataflowBlockOptions dataflowBlockOptions);
new System.Threading.Tasks.Dataflow.ActionBlock<'Input> : Func<'Input, System.Threading.Tasks.Task> * System.Threading.Tasks.Dataflow.ExecutionDataflowBlockOptions -> System.Threading.Tasks.Dataflow.ActionBlock<'Input>
Public Sub New (action As Func(Of TInput, Task), dataflowBlockOptions As ExecutionDataflowBlockOptions)
Parameters
- dataflowBlockOptions
- ExecutionDataflowBlockOptions
The options with which to configure this ActionBlock<TInput>.
Exceptions
Applies to
.NET 9 和其他版本
产品 | 版本 |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8 (package-provided), 8, 9 (package-provided), 9 |
.NET Framework | 4.7 (package-provided), 4.7.1 (package-provided), 4.7.2 (package-provided), 4.8 (package-provided) |
.NET Standard | 2.0 (package-provided), 2.1 (package-provided) |
UWP | 10.0 |