Task.WaitAll Task.WaitAll Task.WaitAll Task.WaitAll Method

Définition

Attend la fin de l'exécution de tous les objets Task fournis.Waits for all of the provided Task objects to complete execution.

Surcharges

WaitAll(Task[]) WaitAll(Task[]) WaitAll(Task[]) WaitAll(Task[])

Attend la fin de l'exécution de tous les objets Task fournis.Waits for all of the provided Task objects to complete execution.

WaitAll(Task[], Int32) WaitAll(Task[], Int32) WaitAll(Task[], Int32) WaitAll(Task[], Int32)

Attend la fin de l'exécution de tous les objets Task fournis en un nombre de millisecondes spécifié.Waits for all of the provided Task objects to complete execution within a specified number of milliseconds.

WaitAll(Task[], CancellationToken) WaitAll(Task[], CancellationToken) WaitAll(Task[], CancellationToken)

Attend la fin de l'exécution de tous les objets Task fournis sauf si l'attente est annulée.Waits for all of the provided Task objects to complete execution unless the wait is cancelled.

WaitAll(Task[], TimeSpan) WaitAll(Task[], TimeSpan) WaitAll(Task[], TimeSpan) WaitAll(Task[], TimeSpan)

Attend la fin de l'exécution de tous les objets Task pouvant être annulés fournis dans un intervalle de temps spécifié.Waits for all of the provided cancellable Task objects to complete execution within a specified time interval.

WaitAll(Task[], Int32, CancellationToken) WaitAll(Task[], Int32, CancellationToken) WaitAll(Task[], Int32, CancellationToken)

Attend la fin de l'exécution de tous les objets Task fournis en un nombre de millisecondes spécifié ou jusqu'à ce que l'attente soit annulée.Waits for all of the provided Task objects to complete execution within a specified number of milliseconds or until the wait is cancelled.

WaitAll(Task[]) WaitAll(Task[]) WaitAll(Task[]) WaitAll(Task[])

Attend la fin de l'exécution de tous les objets Task fournis.Waits for all of the provided Task objects to complete execution.

public:
 static void WaitAll(... cli::array <System::Threading::Tasks::Task ^> ^ tasks);
public static void WaitAll (params System.Threading.Tasks.Task[] tasks);
static member WaitAll : System.Threading.Tasks.Task[] -> unit
Public Shared Sub WaitAll (ParamArray tasks As Task())

Paramètres

tasks
Task[]

Tableau d'instances de Task sur lesquelles attendre.An array of Task instances on which to wait.

Exceptions

Un ou plusieurs objets Task de tasks ont été supprimés.One or more of the Task objects in tasks has been disposed.

L'argument tasks a la valeur null.The tasks argument is null.

L’argument tasks contient un élément Null.The tasks argument contains a null element.

Au moins une des instances de Task a été annulée.At least one of the Task instances was canceled. Si une tâche a été annulée, l’exception AggregateException contient une exception OperationCanceledException dans sa collection InnerExceptions.If a task was canceled, the AggregateException exception contains an OperationCanceledException exception in its InnerExceptions collection.

ou-or- Une exception a été levée pendant l’exécution d’au moins une des instances de Task.An exception was thrown during the execution of at least one of the Task instances.

Exemples

L’exemple suivant démarre les tâches de 10, chacun d’eux est passé à un index en tant qu’un objet d’état.The following example starts 10 tasks, each of which is passed an index as a state object. Tâches avec un index de deux à cinq lever des exceptions.Tasks with an index from two to five throw exceptions. L’appel à la WaitAll méthode encapsule toutes les exceptions dans un AggregateException de l’objet et se propage vers le thread appelant.The call to the WaitAll method wraps all exceptions in an AggregateException object and propagates it to the calling thread.

using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

class Example
{
    static void Main()
    {
        var tasks = new List<Task<int>>();
         
        // Define a delegate that prints and returns the system tick count
        Func<object, int> action = (object obj) =>
        {
            int i = (int)obj;

            // Make each thread sleep a different time in order to return a different tick count
            Thread.Sleep(i * 100);

            // The tasks that receive an argument between 2 and 5 throw exceptions
            if (2 <= i && i <= 5)
            {
                throw new InvalidOperationException("SIMULATED EXCEPTION");
            }

            int tickCount = Environment.TickCount;
            Console.WriteLine("Task={0}, i={1}, TickCount={2}, Thread={3}", Task.CurrentId, i, tickCount, Thread.CurrentThread.ManagedThreadId);

            return tickCount;
        };

        // Construct started tasks
        for (int i = 0; i < 10; i++)
        {
            int index = i;
            tasks.Add(Task<int>.Factory.StartNew(action, index));
        }

        try
        {
            // Wait for all the tasks to finish.
            Task.WaitAll(tasks.ToArray());

            // We should never get to this point
            Console.WriteLine("WaitAll() has not thrown exceptions. THIS WAS NOT EXPECTED.");
        }
        catch (AggregateException e)
        {
            Console.WriteLine("\nThe following exceptions have been thrown by WaitAll(): (THIS WAS EXPECTED)");
            for (int j = 0; j < e.InnerExceptions.Count; j++)
            {
                Console.WriteLine("\n-------------------------------------------------\n{0}", e.InnerExceptions[j].ToString());
            }
        }
    }
}
// The example displays output like the following:
//     Task=1, i=0, TickCount=1203822250, Thread=3
//     Task=2, i=1, TickCount=1203822359, Thread=4
//     Task=7, i=6, TickCount=1203823484, Thread=3
//     Task=8, i=7, TickCount=1203823890, Thread=4
//     Task=9, i=8, TickCount=1203824296, Thread=3
//     Task=10, i=9, TickCount=1203824796, Thread=4
//     
//     The following exceptions have been thrown by WaitAll(): (THIS WAS EXPECTED)
//     
//     -------------------------------------------------
//     System.InvalidOperationException: SIMULATED EXCEPTION
//        at Example.<Main>b__0(Object obj)
//        at System.Threading.Tasks.Task`1.InnerInvoke()
//        at System.Threading.Tasks.Task.Execute()
//     
//     -------------------------------------------------
//     System.InvalidOperationException: SIMULATED EXCEPTION
//        at Example.<Main>b__0(Object obj)
//        at System.Threading.Tasks.Task`1.InnerInvoke()
//        at System.Threading.Tasks.Task.Execute()
//     
//     -------------------------------------------------
//     System.InvalidOperationException: SIMULATED EXCEPTION
//        at Example.<Main>b__0(Object obj)
//        at System.Threading.Tasks.Task`1.InnerInvoke()
//        at System.Threading.Tasks.Task.Execute()
//     
//     -------------------------------------------------
//     System.InvalidOperationException: SIMULATED EXCEPTION
//        at Example.<Main>b__0(Object obj)
//        at System.Threading.Tasks.Task`1.InnerInvoke()
//        at System.Threading.Tasks.Task.Execute()
Imports System.Collections.Generic
Imports System.Threading
Imports System.Threading.Tasks

Module WaitAllDemo
    Sub Main()
        Dim tasks As New List(Of Task(Of Integer))()
        ' Define a delegate that prints and returns the system tick count
        Dim action As Func(Of Object, Integer) = Function(obj As Object)
                                                     Dim i As Integer = CInt(obj)

                                                     ' Make each thread sleep a different time in order to return a different tick count
                                                     Thread.Sleep(i * 100)

                                                     ' The tasks that receive an argument between 2 and 5 throw exceptions
                                                     If 2 <= i AndAlso i <= 5 Then
                                                         Throw New InvalidOperationException("SIMULATED EXCEPTION")
                                                     End If

                                                     Dim tickCount As Integer = Environment.TickCount
                                                     Console.WriteLine("Task={0}, i={1}, TickCount={2}, Thread={3}", Task.CurrentId, i, tickCount, Thread.CurrentThread.ManagedThreadId)

                                                     Return tickCount
                                                 End Function

        ' Construct started tasks
        For i As Integer = 0 To 9
            Dim index As Integer = i
            tasks.Add(Task(Of Integer).Factory.StartNew(action, index))
        Next

        Try
            ' Wait for all the tasks to finish.
            Task.WaitAll(tasks.ToArray())

            ' We should never get to this point
            Console.WriteLine("WaitAll() has not thrown exceptions. THIS WAS NOT EXPECTED.")
        Catch e As AggregateException
            Console.WriteLine(vbLf & "The following exceptions have been thrown by WaitAll(): (THIS WAS EXPECTED)")
            For j As Integer = 0 To e.InnerExceptions.Count - 1
                Console.WriteLine(vbLf & "-------------------------------------------------" & vbLf & "{0}", e.InnerExceptions(j).ToString())
            Next
        End Try
    End Sub
End Module
' The example displays output like the following:
'     Task=1, i=0, TickCount=1203822250, Thread=3
'     Task=2, i=1, TickCount=1203822359, Thread=4
'     Task=7, i=6, TickCount=1203823484, Thread=3
'     Task=8, i=7, TickCount=1203823890, Thread=4
'     Task=9, i=8, TickCount=1203824296, Thread=3
'     Task=10, i=9, TickCount=1203824796, Thread=4
'     
'     The following exceptions have been thrown by WaitAll(): (THIS WAS EXPECTED)
'     
'     -------------------------------------------------
'     System.InvalidOperationException: SIMULATED EXCEPTION
'        at Example.<Main>b__0(Object obj)
'        at System.Threading.Tasks.Task`1.InnerInvoke()
'        at System.Threading.Tasks.Task.Execute()
'     
'     -------------------------------------------------
'     System.InvalidOperationException: SIMULATED EXCEPTION
'        at Example.<Main>b__0(Object obj)
'        at System.Threading.Tasks.Task`1.InnerInvoke()
'        at System.Threading.Tasks.Task.Execute()
'     
'     -------------------------------------------------
'     System.InvalidOperationException: SIMULATED EXCEPTION
'        at Example.<Main>b__0(Object obj)
'        at System.Threading.Tasks.Task`1.InnerInvoke()
'        at System.Threading.Tasks.Task.Execute()
'     
'     -------------------------------------------------
'     System.InvalidOperationException: SIMULATED EXCEPTION
'        at Example.<Main>b__0(Object obj)
'        at System.Threading.Tasks.Task`1.InnerInvoke()
'        at System.Threading.Tasks.Task.Execute()

WaitAll(Task[], Int32) WaitAll(Task[], Int32) WaitAll(Task[], Int32) WaitAll(Task[], Int32)

Attend la fin de l'exécution de tous les objets Task fournis en un nombre de millisecondes spécifié.Waits for all of the provided Task objects to complete execution within a specified number of milliseconds.

public:
 static bool WaitAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, int millisecondsTimeout);
public static bool WaitAll (System.Threading.Tasks.Task[] tasks, int millisecondsTimeout);
static member WaitAll : System.Threading.Tasks.Task[] * int -> bool
Public Shared Function WaitAll (tasks As Task(), millisecondsTimeout As Integer) As Boolean

Paramètres

tasks
Task[]

Tableau d'instances de Task sur lesquelles attendre.An array of Task instances on which to wait.

millisecondsTimeout
Int32 Int32 Int32 Int32

Nombre de millisecondes à attendre, ou Infinite (-1) pour un délai d'attente infini.The number of milliseconds to wait, or Infinite (-1) to wait indefinitely.

Retours

true si l'exécution de toutes les instances Task s'est terminée dans le délai imparti ; sinon, false.true if all of the Task instances completed execution within the allotted time; otherwise, false.

Exceptions

Un ou plusieurs objets Task de tasks ont été supprimés.One or more of the Task objects in tasks has been disposed.

L'argument tasks a la valeur null.The tasks argument is null.

Au moins une des instances de Task a été annulée.At least one of the Task instances was canceled. Si une tâche a été annulée, AggregateException contient OperationCanceledException dans sa collection InnerExceptions.If a task was canceled, the AggregateException contains an OperationCanceledException in its InnerExceptions collection.

ou-or- Une exception a été levée pendant l’exécution d’au moins une des instances de Task.An exception was thrown during the execution of at least one of the Task instances.

millisecondsTimeout est un nombre négatif différent de -1, qui représente un délai d’attente infini.millisecondsTimeout is a negative number other than -1, which represents an infinite time-out.

L’argument tasks contient un élément Null.The tasks argument contains a null element.

WaitAll(Task[], CancellationToken) WaitAll(Task[], CancellationToken) WaitAll(Task[], CancellationToken)

Attend la fin de l'exécution de tous les objets Task fournis sauf si l'attente est annulée.Waits for all of the provided Task objects to complete execution unless the wait is cancelled.

public:
 static void WaitAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, System::Threading::CancellationToken cancellationToken);
public static void WaitAll (System.Threading.Tasks.Task[] tasks, System.Threading.CancellationToken cancellationToken);
static member WaitAll : System.Threading.Tasks.Task[] * System.Threading.CancellationToken -> unit

Paramètres

tasks
Task[]

Tableau d'instances de Task sur lesquelles attendre.An array of Task instances on which to wait.

cancellationToken
CancellationToken CancellationToken CancellationToken CancellationToken

A CancellationToken à observer en attendant que les tâches se terminent.A CancellationToken to observe while waiting for the tasks to complete.

Exceptions

cancellationToken a été annulé.The cancellationToken was canceled.

L'argument tasks a la valeur null.The tasks argument is null.

Au moins une des instances de Task a été annulée.At least one of the Task instances was canceled. Si une tâche a été annulée, AggregateException contient OperationCanceledException dans sa collection InnerExceptions.If a task was canceled, the AggregateException contains an OperationCanceledException in its InnerExceptions collection.

ou-or- Une exception a été levée pendant l’exécution d’au moins une des instances de Task.An exception was thrown during the execution of at least one of the Task instances.

L’argument tasks contient un élément Null.The tasks argument contains a null element.

Un ou plusieurs objets Task de tasks ont été supprimés.One or more of the Task objects in tasks has been disposed.

Remarques

Le cancellationToken argument est utilisé pour annuler l’opération d’attente.The cancellationToken argument is used to cancel the wait operation. L’annulation des tâches est une opération distincte et est signalée par le AggregateException comme indiqué ci-dessus.Cancellation of the tasks is a distinct operation, and is signaled by the AggregateException as noted above.

WaitAll(Task[], TimeSpan) WaitAll(Task[], TimeSpan) WaitAll(Task[], TimeSpan) WaitAll(Task[], TimeSpan)

Attend la fin de l'exécution de tous les objets Task pouvant être annulés fournis dans un intervalle de temps spécifié.Waits for all of the provided cancellable Task objects to complete execution within a specified time interval.

public:
 static bool WaitAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, TimeSpan timeout);
public static bool WaitAll (System.Threading.Tasks.Task[] tasks, TimeSpan timeout);
static member WaitAll : System.Threading.Tasks.Task[] * TimeSpan -> bool
Public Shared Function WaitAll (tasks As Task(), timeout As TimeSpan) As Boolean

Paramètres

tasks
Task[]

Tableau d'instances de Task sur lesquelles attendre.An array of Task instances on which to wait.

timeout
TimeSpan TimeSpan TimeSpan TimeSpan

TimeSpan qui représente le nombre de millièmes de secondes à attendre ou TimeSpan qui représente -1 millième de seconde, pour attendre indéfiniment.A TimeSpan that represents the number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely.

Retours

true si l'exécution de toutes les instances Task s'est terminée dans le délai imparti ; sinon, false.true if all of the Task instances completed execution within the allotted time; otherwise, false.

Exceptions

Un ou plusieurs objets Task de tasks ont été supprimés.One or more of the Task objects in tasks has been disposed.

L'argument tasks a la valeur null.The tasks argument is null.

Au moins une des instances de Task a été annulée.At least one of the Task instances was canceled. Si une tâche a été annulée, AggregateException contient OperationCanceledException dans sa collection InnerExceptions.If a task was canceled, the AggregateException contains an OperationCanceledException in its InnerExceptions collection.

ou-or- Une exception a été levée pendant l’exécution d’au moins une des instances de Task.An exception was thrown during the execution of at least one of the Task instances.

timeout est un nombre négatif autre que -1 milliseconde, qui représente un délai d’attente infini.timeout is a negative number other than -1 milliseconds, which represents an infinite time-out. ou-or- timeout est supérieur à MaxValue.timeout is greater than MaxValue.

L’argument tasks contient un élément Null.The tasks argument contains a null element.

WaitAll(Task[], Int32, CancellationToken) WaitAll(Task[], Int32, CancellationToken) WaitAll(Task[], Int32, CancellationToken)

Attend la fin de l'exécution de tous les objets Task fournis en un nombre de millisecondes spécifié ou jusqu'à ce que l'attente soit annulée.Waits for all of the provided Task objects to complete execution within a specified number of milliseconds or until the wait is cancelled.

public:
 static bool WaitAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, int millisecondsTimeout, System::Threading::CancellationToken cancellationToken);
public static bool WaitAll (System.Threading.Tasks.Task[] tasks, int millisecondsTimeout, System.Threading.CancellationToken cancellationToken);
static member WaitAll : System.Threading.Tasks.Task[] * int * System.Threading.CancellationToken -> bool

Paramètres

tasks
Task[]

Tableau d'instances de Task sur lesquelles attendre.An array of Task instances on which to wait.

millisecondsTimeout
Int32 Int32 Int32 Int32

Nombre de millisecondes à attendre, ou Infinite (-1) pour un délai d'attente infini.The number of milliseconds to wait, or Infinite (-1) to wait indefinitely.

cancellationToken
CancellationToken CancellationToken CancellationToken CancellationToken

A CancellationToken à observer en attendant que les tâches se terminent.A CancellationToken to observe while waiting for the tasks to complete.

Retours

true si l'exécution de toutes les instances Task s'est terminée dans le délai imparti ; sinon, false.true if all of the Task instances completed execution within the allotted time; otherwise, false.

Exceptions

Un ou plusieurs objets Task de tasks ont été supprimés.One or more of the Task objects in tasks has been disposed.

L'argument tasks a la valeur null.The tasks argument is null.

Au moins une des instances de Task a été annulée.At least one of the Task instances was canceled. Si une tâche a été annulée, AggregateException contient OperationCanceledException dans sa collection InnerExceptions.If a task was canceled, the AggregateException contains an OperationCanceledException in its InnerExceptions collection.

ou-or- Une exception a été levée pendant l’exécution d’au moins une des instances de Task.An exception was thrown during the execution of at least one of the Task instances.

millisecondsTimeout est un nombre négatif différent de -1, qui représente un délai d’attente infini.millisecondsTimeout is a negative number other than -1, which represents an infinite time-out.

L’argument tasks contient un élément Null.The tasks argument contains a null element.

cancellationToken a été annulé.The cancellationToken was canceled.

Remarques

Le cancellationToken argument est utilisé pour annuler l’opération d’attente.The cancellationToken argument is used to cancel the wait operation. L’annulation des tâches est une opération distincte et est signalée par le AggregateException indiqué ci-dessus.Cancellation of the tasks is a distinct operation, and is signaled by the AggregateException noted above.

S’applique à