Task.WaitAny Méthode

public:
 static int WaitAny(cli::array <System::Threading::Tasks::Task ^> ^ tasks, int millisecondsTimeout, System::Threading::CancellationToken cancellationToken);

public static int WaitAny(System.Threading.Tasks.Task[] tasks, int millisecondsTimeout, System.Threading.CancellationToken cancellationToken);

static member WaitAny : System.Threading.Tasks.Task[] * int * System.Threading.CancellationToken -> int

Public Shared Function WaitAny (tasks As Task(), millisecondsTimeout As Integer, cancellationToken As CancellationToken) As Integer

Paramètres

Retours

Index de la tâche terminée dans l’argument tasks tableau ou -1 si le délai d’expiration s’est produit.

Exceptions

public:
 static int WaitAny(cli::array <System::Threading::Tasks::Task ^> ^ tasks, TimeSpan timeout);

public static int WaitAny(System.Threading.Tasks.Task[] tasks, TimeSpan timeout);

static member WaitAny : System.Threading.Tasks.Task[] * TimeSpan -> int

Public Shared Function WaitAny (tasks As Task(), timeout As TimeSpan) As Integer

Paramètres

Retours

Index de la tâche terminée dans l’argument tasks tableau ou -1 si le délai d’expiration s’est produit.

Exceptions

public:
 static int WaitAny(cli::array <System::Threading::Tasks::Task ^> ^ tasks, int millisecondsTimeout);

public static int WaitAny(System.Threading.Tasks.Task[] tasks, int millisecondsTimeout);

static member WaitAny : System.Threading.Tasks.Task[] * int -> int

Public Shared Function WaitAny (tasks As Task(), millisecondsTimeout As Integer) As Integer

Paramètres

Retours

Index de la tâche terminée dans l’argument tasks tableau ou -1 si le délai d’expiration s’est produit.

Exceptions

public:
 static int WaitAny(cli::array <System::Threading::Tasks::Task ^> ^ tasks, System::Threading::CancellationToken cancellationToken);

public static int WaitAny(System.Threading.Tasks.Task[] tasks, System.Threading.CancellationToken cancellationToken);

static member WaitAny : System.Threading.Tasks.Task[] * System.Threading.CancellationToken -> int

Public Shared Function WaitAny (tasks As Task(), cancellationToken As CancellationToken) As Integer

Paramètres

Retours

Index de la tâche terminée dans l’argument tasks tableau.

Exceptions

public:
 static int WaitAny(... cli::array <System::Threading::Tasks::Task ^> ^ tasks);

public static int WaitAny(params System.Threading.Tasks.Task[] tasks);

static member WaitAny : System.Threading.Tasks.Task[] -> int

Public Shared Function WaitAny (ParamArray tasks As Task()) As Integer

Paramètres

Retours

Index de l’objet terminé Task dans le tasks tableau.

Exceptions

Exemples

L’exemple suivant lance cinq tâches, chacune d’elles étant en veille pendant un minimum de 50 millisecondes ou un maximum de 1 050 millisecondes. La WaitAny méthode attend ensuite la fin de l’une des tâches. L’exemple affiche l’ID de tâche de la tâche qui a terminé l’attente, ainsi que l’état actuel de toutes les tâches.

using System;
using System.Threading;
using System.Threading.Tasks;

public class Example
{
   public static void Main()
   {
      Task[] tasks = new Task[5];
      for (int ctr = 0; ctr <= 4; ctr++) {
         int factor = ctr;
         tasks[ctr] = Task.Run(() => Thread.Sleep(factor * 250 + 50));
      }
      int index = Task.WaitAny(tasks);
      Console.WriteLine("Wait ended because task #{0} completed.",
                        tasks[index].Id);
      Console.WriteLine("\nCurrent Status of Tasks:");
      foreach (var t in tasks)
         Console.WriteLine("   Task {0}: {1}", t.Id, t.Status);
   }
}
// The example displays output like the following:
//       Wait ended because task #1 completed.
//
//       Current Status of Tasks:
//          Task 1: RanToCompletion
//          Task 2: Running
//          Task 3: Running
//          Task 4: Running
//          Task 5: Running

open System.Threading
open System.Threading.Tasks

let tasks =
    [| for factor = 0 to 4 do
           Task.Run(fun () -> Thread.Sleep(factor * 250 + 50)) |]

let index = Task.WaitAny tasks
printfn $"Wait ended because task #{tasks[index].Id} completed."
printfn "\nCurrent Status of Tasks:"

for t in tasks do
    printfn $"   Task {t.Id}: {t.Status}"


// The example displays output like the following:
//       Wait ended because task #1 completed.
//
//       Current Status of Tasks:
//          Task 1: RanToCompletion
//          Task 2: Running
//          Task 3: Running
//          Task 4: Running
//          Task 5: Running

Imports System.Threading
Imports System.Threading.Tasks

Module Example
   Public Sub Main()
      Dim tasks(4) As Task
      For ctr As Integer = 0 To 4
         Dim factor As Integer = ctr
         tasks(ctr) = Task.Run(Sub() Thread.Sleep(factor * 250 + 50))
      Next
      Dim index As Integer = Task.WaitAny(tasks)

      Console.WriteLine("Wait ended because task #{0} completed.",
                        tasks(index).Id)
      Console.WriteLine()
      Console.WriteLine("Current Status of Tasks:")
      For Each t In tasks
         Console.WriteLine("   Task {0}: {1}", t.Id, t.Status)
      Next
   End Sub
End Module
' The example displays output like the following:
'       Wait ended because task #1 completed.
'
'       Current Status of Tasks:
'          Task 1: RanToCompletion
'          Task 2: Running
'          Task 3: Running
'          Task 4: Running
'          Task 5: Running