TaskFactory.ContinueWhenAll Method

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
 System::Threading::Tasks::Task ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, Action<cli::array <System::Threading::Tasks::Task ^> ^> ^ continuationAction);

public System.Threading.Tasks.Task ContinueWhenAll(System.Threading.Tasks.Task[] tasks, Action<System.Threading.Tasks.Task[]> continuationAction);

member this.ContinueWhenAll : System.Threading.Tasks.Task[] * Action<System.Threading.Tasks.Task[]> -> System.Threading.Tasks.Task

Public Function ContinueWhenAll (tasks As Task(), continuationAction As Action(Of Task())) As Task

Parameters

Returns

The new continuation task.

Exceptions

Examples

The following example launches separate tasks that use a regular expression to count the number of words in a set of text files. The ContinueWhenAll method is used to launch a task that displays the total word count when all the antecedent tasks have completed.

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using System.Text.RegularExpressions;

public class Example
{
 public static void Main()
 {
 string[] filenames = { "chapter1.txt", "chapter2.txt", 
 "chapter3.txt", "chapter4.txt",
 "chapter5.txt" };
 string pattern = @"\b\w+\b";
 var tasks = new List<Task>(); 
 int totalWords = 0;
 
 // Determine the number of words in each file.
 foreach (var filename in filenames) 
 tasks.Add( Task.Factory.StartNew( fn => { if (!File.Exists(fn.ToString()))
 throw new FileNotFoundException("{0} does not exist.", filename);

 StreamReader sr = new StreamReader(fn.ToString());
 String content = sr.ReadToEnd();
 sr.Close();
 int words = Regex.Matches(content, pattern).Count;
 Interlocked.Add(ref totalWords, words); 
 Console.WriteLine("{0,-25} {1,6:N0} words", fn, words); }, 
 filename));

 var finalTask = Task.Factory.ContinueWhenAll(tasks.ToArray(), wordCountTasks => {
 int nSuccessfulTasks = 0;
 int nFailed = 0;
 int nFileNotFound = 0;
 foreach (var t in wordCountTasks) {
 if (t.Status == TaskStatus.RanToCompletion) 
 nSuccessfulTasks++;
 
 if (t.Status == TaskStatus.Faulted) {
 nFailed++; 
 t.Exception.Handle( (e) => { 
 if (e is FileNotFoundException)
 nFileNotFound++;
 return true; 
 });
 } 
 } 
 Console.WriteLine("\n{0,-25} {1,6} total words\n", 
 String.Format("{0} files", nSuccessfulTasks), 
 totalWords); 
 if (nFailed > 0) {
 Console.WriteLine("{0} tasks failed for the following reasons:", nFailed);
 Console.WriteLine(" File not found: {0}", nFileNotFound);
 if (nFailed != nFileNotFound)
 Console.WriteLine(" Other: {0}", nFailed - nFileNotFound);
 } 
 }); 
 finalTask.Wait(); 
 }
}
// The example displays output like the following:
// chapter2.txt 1,585 words
// chapter1.txt 4,012 words
// chapter5.txt 4,660 words
// chapter3.txt 7,481 words
// 
// 4 files 17738 total words
// 
// 1 tasks failed for the following reasons:
// File not found: 1

Imports System.Collections.Generic
Imports System.IO
Imports System.Threading
Imports System.Threading.Tasks
Imports System.Text.RegularExpressions

Module Example
 Dim totalWords As Integer = 0
 
 Public Sub Main()
 Dim filenames() As String = { "chapter1.txt", "chapter2.txt", 
 "chapter3.txt", "chapter4.txt",
 "chapter5.txt" }
 Dim pattern As String = "\b\w+\b"
 Dim tasks As New List(Of Task)() 
 
 ' Determine the number of words in each file.
 For Each filename In filenames 
 tasks.Add(Task.Factory.StartNew( Sub(fn)
 If Not File.Exists(filename)
 Throw New FileNotFoundException("{0} does not exist.", filename)
 End If
 
 Dim sr As New StreamReader(fn.ToString())
 Dim content As String = sr.ReadToEnd()
 sr.Close()
 Dim words As Integer = Regex.Matches(content, pattern).Count
 Interlocked.Add(totalWords, words) 
 Console.WriteLine("{0,-25} {1,6:N0} words", fn, words)
 End Sub, filename))
 Next
 
 Dim finalTask As Task = Task.Factory.ContinueWhenAll(tasks.ToArray(), 
 Sub(wordCountTasks As Task() )
 Dim nSuccessfulTasks As Integer = 0
 Dim nFailed As Integer = 0
 Dim nFileNotFound As Integer = 0
 For Each t In wordCountTasks
 If t.Status = TaskStatus.RanToCompletion Then _ 
 nSuccessfulTasks += 1
 
 If t.Status = TaskStatus.Faulted Then
 nFailed += 1 
 t.Exception.Handle(Function(e As Exception) 
 If TypeOf e Is FileNotFoundException Then
 nFileNotFound += 1
 End If 
 Return True 
 End Function) 
 End If 
 Next 
 Console.WriteLine()
 Console.WriteLine("{0,-25} {1,6} total words", 
 String.Format("{0} files", nSuccessfulTasks), 
 totalWords) 
 If nFailed > 0 Then
 Console.WriteLine()
 Console.WriteLine("{0} tasks failed for the following reasons:", nFailed)
 Console.WriteLine(" File not found: {0}", nFileNotFound)
 If nFailed <> nFileNotFound Then
 Console.WriteLine(" Other: {0}", nFailed - nFileNotFound)
 End If 
 End If
 End Sub)
 finalTask.Wait() 
 End Sub
 
 Private Sub DisplayResult(wordCountTasks As Task())
 End Sub
End Module
' The example displays output like the following:
' chapter2.txt 1,585 words
' chapter1.txt 4,012 words
' chapter5.txt 4,660 words
' chapter3.txt 7,481 words
' 
' 4 files 17738 total words
' 
' 1 tasks failed for the following reasons:
' File not found: 1

The call to the continuation task's Task.Wait method does not allow it to handle exceptions thrown by the antecedent tasks, so the example examines the Task.Status property of each antecedent task to determine whether the task succeeded.

Remarks

The ContinueWhenAll method executes the continuationAction delegate when all tasks in the tasks array have completed, regardless of their completion status.

Exceptions thrown by tasks in the tasks array are not available to the continuation task through structured exception handling. You can determine which exceptions were thrown by examining the Task.Exception property of each task in the tasks array. To use structured exception handling to handle exceptions thrown by tasks in the tasks array, call the Task.WaitAll(Task[]) method.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
 System::Threading::Tasks::Task ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, Action<cli::array <System::Threading::Tasks::Task ^> ^> ^ continuationAction, System::Threading::CancellationToken cancellationToken);

public System.Threading.Tasks.Task ContinueWhenAll(System.Threading.Tasks.Task[] tasks, Action<System.Threading.Tasks.Task[]> continuationAction, System.Threading.CancellationToken cancellationToken);

member this.ContinueWhenAll : System.Threading.Tasks.Task[] * Action<System.Threading.Tasks.Task[]> * System.Threading.CancellationToken -> System.Threading.Tasks.Task

Public Function ContinueWhenAll (tasks As Task(), continuationAction As Action(Of Task()), cancellationToken As CancellationToken) As Task

Parameters

Returns

The new continuation task.

Exceptions

Examples

The following example creates a cancellation token, which it passes to separate tasks that use a regular expression to count the number of words in a set of text files. The cancellation token is set if a file cannot be found. The ContinueWhenAll(Task[], Action{Task[]}, CancellationToken) method is used to launch a task that displays the total word count when all the antecedent tasks have completed. If the cancellation token is set, which indicates that one or more tasks have been cancelled, it handles the AggregateException exception and displays an error message.

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using System.Text.RegularExpressions;

public class Example
{
 public static void Main()
 {
 string[] filenames = { "chapter1.txt", "chapter2.txt", 
 "chapter3.txt", "chapter4.txt",
 "chapter5.txt" };
 string pattern = @"\b\w+\b";
 var tasks = new List<Task>(); 
 CancellationTokenSource source = new CancellationTokenSource();
 CancellationToken token = source.Token;
 int totalWords = 0;
 
 // Determine the number of words in each file.
 foreach (var filename in filenames)
 tasks.Add( Task.Factory.StartNew( fn => { token.ThrowIfCancellationRequested(); 

 if (!File.Exists(fn.ToString())) {
 source.Cancel();
 token.ThrowIfCancellationRequested();
 }
 
 StreamReader sr = new StreamReader(fn.ToString());
 String content = sr.ReadToEnd();
 sr.Close();
 int words = Regex.Matches(content, pattern).Count;
 Interlocked.Add(ref totalWords, words); 
 Console.WriteLine("{0,-25} {1,6:N0} words", fn, words); }, 
 filename, token));

 var finalTask = Task.Factory.ContinueWhenAll(tasks.ToArray(), wordCountTasks => {
 if (!token.IsCancellationRequested) 
 Console.WriteLine("\n{0,-25} {1,6} total words\n", 
 String.Format("{0} files", wordCountTasks.Length), 
 totalWords); 
 }, token); 
 try { 
 finalTask.Wait();
 }
 catch (AggregateException ae) {
 foreach (Exception inner in ae.InnerExceptions)
 if (inner is TaskCanceledException)
 Console.WriteLine("\nFailure to determine total word count: a task was cancelled.");
 else
 Console.WriteLine("\nFailure caused by {0}", inner.GetType().Name); 
 }
 finally {
 source.Dispose();
 }
 }
}
// The example displays output like the following:
// chapter2.txt 1,585 words
// chapter1.txt 4,012 words
// 
// Failure to determine total word count: a task was cancelled.

Imports System.Collections.Generic
Imports System.IO
Imports System.Threading
Imports System.Threading.Tasks
Imports System.Text.RegularExpressions

Module Example
 Public Sub Main()
 Dim filenames() As String= { "chapter1.txt", "chapter2.txt", 
 "chapter3.txt", "chapter4.txt",
 "chapter5.txt" }
 Dim pattern As String = "\b\w+\b"
 Dim tasks As New List(Of Task)() 
 Dim source As New CancellationTokenSource()
 Dim token As CancellationToken = source.Token
 Dim totalWords As Integer = 0
 
 ' Determine the number of words in each file.
 For Each filename In filenames
 tasks.Add( Task.Factory.StartNew( Sub(obj As Object)
 Dim fn As String = CStr(obj)
 token.ThrowIfCancellationRequested() 
 If Not File.Exists(fn) Then 
 source.Cancel()
 token.ThrowIfCancellationRequested()
 End If 
 
 Dim sr As New StreamReader(fn.ToString())
 Dim content As String = sr.ReadToEnd()
 sr.Close()
 Dim words As Integer = Regex.Matches(content, pattern).Count
 Interlocked.Add(totalWords, words) 
 Console.WriteLine("{0,-25} {1,6:N0} words", fn, words) 
 End Sub, filename, token))
 Next
 
 Dim finalTask As Task = Task.Factory.ContinueWhenAll(tasks.ToArray(), 
 Sub(wordCountTasks As Task())
 If Not token.IsCancellationRequested Then 
 Console.WriteLine("\n{0,-25} {1,6} total words\n", 
 String.Format("{0} files", wordCountTasks.Length), 
 totalWords)
 End If 
 End Sub, token) 
 Try 
 finalTask.Wait()
 Catch ae As AggregateException 
 For Each inner In ae.InnerExceptions
 Console.WriteLine()
 If TypeOf inner Is TaskCanceledException
 Console.WriteLine("Failure to determine total word count: a task was cancelled.")
 Else
 Console.WriteLine("Failure caused by {0}", inner.GetType().Name)
 End If 
 Next 
 Finally
 source.Dispose()
 End Try 
 End Sub
End Module
' The example displays output like the following:
' chapter2.txt 1,585 words
' chapter1.txt 4,012 words
' 
' Failure to determine total word count: a task was cancelled.

Remarks

This method executes the continuationAction delegate when all tasks in the tasks array have completed, regardless of their completion status.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
 System::Threading::Tasks::Task ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, Action<cli::array <System::Threading::Tasks::Task ^> ^> ^ continuationAction, System::Threading::Tasks::TaskContinuationOptions continuationOptions);

public System.Threading.Tasks.Task ContinueWhenAll(System.Threading.Tasks.Task[] tasks, Action<System.Threading.Tasks.Task[]> continuationAction, System.Threading.Tasks.TaskContinuationOptions continuationOptions);

member this.ContinueWhenAll : System.Threading.Tasks.Task[] * Action<System.Threading.Tasks.Task[]> * System.Threading.Tasks.TaskContinuationOptions -> System.Threading.Tasks.Task

Public Function ContinueWhenAll (tasks As Task(), continuationAction As Action(Of Task()), continuationOptions As TaskContinuationOptions) As Task

Parameters

Returns

The new continuation task.

Exceptions

Remarks

The NotOn* and OnlyOn* TaskContinuationOptions, which constrain for which TaskStatus states a continuation will be executed, are illegal with ContinueWhenAll.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
 System::Threading::Tasks::Task ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, Action<cli::array <System::Threading::Tasks::Task ^> ^> ^ continuationAction, System::Threading::CancellationToken cancellationToken, System::Threading::Tasks::TaskContinuationOptions continuationOptions, System::Threading::Tasks::TaskScheduler ^ scheduler);

public System.Threading.Tasks.Task ContinueWhenAll(System.Threading.Tasks.Task[] tasks, Action<System.Threading.Tasks.Task[]> continuationAction, System.Threading.CancellationToken cancellationToken, System.Threading.Tasks.TaskContinuationOptions continuationOptions, System.Threading.Tasks.TaskScheduler scheduler);

member this.ContinueWhenAll : System.Threading.Tasks.Task[] * Action<System.Threading.Tasks.Task[]> * System.Threading.CancellationToken * System.Threading.Tasks.TaskContinuationOptions * System.Threading.Tasks.TaskScheduler -> System.Threading.Tasks.Task

Public Function ContinueWhenAll (tasks As Task(), continuationAction As Action(Of Task()), cancellationToken As CancellationToken, continuationOptions As TaskContinuationOptions, scheduler As TaskScheduler) As Task

Parameters

Returns

The new continuation task.

Exceptions

Remarks

The NotOn* and OnlyOn* TaskContinuationOptions, which constrain for which TaskStatus states a continuation will be executed, are illegal with ContinueWhenAll.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TAntecedentResult, typename TResult>
 System::Threading::Tasks::Task<TResult> ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^ tasks, Func<cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^, TResult> ^ continuationFunction, System::Threading::CancellationToken cancellationToken, System::Threading::Tasks::TaskContinuationOptions continuationOptions, System::Threading::Tasks::TaskScheduler ^ scheduler);

public System.Threading.Tasks.Task<TResult> ContinueWhenAll<TAntecedentResult,TResult>(System.Threading.Tasks.Task<TAntecedentResult>[] tasks, Func<System.Threading.Tasks.Task<TAntecedentResult>[],TResult> continuationFunction, System.Threading.CancellationToken cancellationToken, System.Threading.Tasks.TaskContinuationOptions continuationOptions, System.Threading.Tasks.TaskScheduler scheduler);

member this.ContinueWhenAll : System.Threading.Tasks.Task<'AntecedentResult>[] * Func<System.Threading.Tasks.Task<'AntecedentResult>[], 'Result> * System.Threading.CancellationToken * System.Threading.Tasks.TaskContinuationOptions * System.Threading.Tasks.TaskScheduler -> System.Threading.Tasks.Task<'Result>

Public Function ContinueWhenAll(Of TAntecedentResult, TResult) (tasks As Task(Of TAntecedentResult)(), continuationFunction As Func(Of Task(Of TAntecedentResult)(), TResult), cancellationToken As CancellationToken, continuationOptions As TaskContinuationOptions, scheduler As TaskScheduler) As Task(Of TResult)

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

Remarks

The NotOn* and OnlyOn* TaskContinuationOptions, which constrain for which TaskStatus states a continuation will be executed, are illegal with ContinueWhenAll.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TAntecedentResult, typename TResult>
 System::Threading::Tasks::Task<TResult> ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^ tasks, Func<cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^, TResult> ^ continuationFunction, System::Threading::Tasks::TaskContinuationOptions continuationOptions);

public System.Threading.Tasks.Task<TResult> ContinueWhenAll<TAntecedentResult,TResult>(System.Threading.Tasks.Task<TAntecedentResult>[] tasks, Func<System.Threading.Tasks.Task<TAntecedentResult>[],TResult> continuationFunction, System.Threading.Tasks.TaskContinuationOptions continuationOptions);

member this.ContinueWhenAll : System.Threading.Tasks.Task<'AntecedentResult>[] * Func<System.Threading.Tasks.Task<'AntecedentResult>[], 'Result> * System.Threading.Tasks.TaskContinuationOptions -> System.Threading.Tasks.Task<'Result>

Public Function ContinueWhenAll(Of TAntecedentResult, TResult) (tasks As Task(Of TAntecedentResult)(), continuationFunction As Func(Of Task(Of TAntecedentResult)(), TResult), continuationOptions As TaskContinuationOptions) As Task(Of TResult)

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

Remarks

The NotOn* and OnlyOn* TaskContinuationOptions, which constrain for which TaskStatus states a continuation will be executed, are illegal with ContinueWhenAll.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TAntecedentResult, typename TResult>
 System::Threading::Tasks::Task<TResult> ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^ tasks, Func<cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^, TResult> ^ continuationFunction, System::Threading::CancellationToken cancellationToken);

public System.Threading.Tasks.Task<TResult> ContinueWhenAll<TAntecedentResult,TResult>(System.Threading.Tasks.Task<TAntecedentResult>[] tasks, Func<System.Threading.Tasks.Task<TAntecedentResult>[],TResult> continuationFunction, System.Threading.CancellationToken cancellationToken);

member this.ContinueWhenAll : System.Threading.Tasks.Task<'AntecedentResult>[] * Func<System.Threading.Tasks.Task<'AntecedentResult>[], 'Result> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<'Result>

Public Function ContinueWhenAll(Of TAntecedentResult, TResult) (tasks As Task(Of TAntecedentResult)(), continuationFunction As Func(Of Task(Of TAntecedentResult)(), TResult), cancellationToken As CancellationToken) As Task(Of TResult)

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TAntecedentResult, typename TResult>
 System::Threading::Tasks::Task<TResult> ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^ tasks, Func<cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^, TResult> ^ continuationFunction);

public System.Threading.Tasks.Task<TResult> ContinueWhenAll<TAntecedentResult,TResult>(System.Threading.Tasks.Task<TAntecedentResult>[] tasks, Func<System.Threading.Tasks.Task<TAntecedentResult>[],TResult> continuationFunction);

member this.ContinueWhenAll : System.Threading.Tasks.Task<'AntecedentResult>[] * Func<System.Threading.Tasks.Task<'AntecedentResult>[], 'Result> -> System.Threading.Tasks.Task<'Result>

Public Function ContinueWhenAll(Of TAntecedentResult, TResult) (tasks As Task(Of TAntecedentResult)(), continuationFunction As Func(Of Task(Of TAntecedentResult)(), TResult)) As Task(Of TResult)

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TAntecedentResult>
 System::Threading::Tasks::Task ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^ tasks, Action<cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^> ^ continuationAction, System::Threading::CancellationToken cancellationToken, System::Threading::Tasks::TaskContinuationOptions continuationOptions, System::Threading::Tasks::TaskScheduler ^ scheduler);

public System.Threading.Tasks.Task ContinueWhenAll<TAntecedentResult>(System.Threading.Tasks.Task<TAntecedentResult>[] tasks, Action<System.Threading.Tasks.Task<TAntecedentResult>[]> continuationAction, System.Threading.CancellationToken cancellationToken, System.Threading.Tasks.TaskContinuationOptions continuationOptions, System.Threading.Tasks.TaskScheduler scheduler);

member this.ContinueWhenAll : System.Threading.Tasks.Task<'AntecedentResult>[] * Action<System.Threading.Tasks.Task<'AntecedentResult>[]> * System.Threading.CancellationToken * System.Threading.Tasks.TaskContinuationOptions * System.Threading.Tasks.TaskScheduler -> System.Threading.Tasks.Task

Public Function ContinueWhenAll(Of TAntecedentResult) (tasks As Task(Of TAntecedentResult)(), continuationAction As Action(Of Task(Of TAntecedentResult)()), cancellationToken As CancellationToken, continuationOptions As TaskContinuationOptions, scheduler As TaskScheduler) As Task

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

Remarks

The NotOn* and OnlyOn* TaskContinuationOptions, which constrain for which TaskStatus states a continuation will be executed, are illegal with ContinueWhenAll.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TAntecedentResult>
 System::Threading::Tasks::Task ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^ tasks, Action<cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^> ^ continuationAction, System::Threading::Tasks::TaskContinuationOptions continuationOptions);

public System.Threading.Tasks.Task ContinueWhenAll<TAntecedentResult>(System.Threading.Tasks.Task<TAntecedentResult>[] tasks, Action<System.Threading.Tasks.Task<TAntecedentResult>[]> continuationAction, System.Threading.Tasks.TaskContinuationOptions continuationOptions);

member this.ContinueWhenAll : System.Threading.Tasks.Task<'AntecedentResult>[] * Action<System.Threading.Tasks.Task<'AntecedentResult>[]> * System.Threading.Tasks.TaskContinuationOptions -> System.Threading.Tasks.Task

Public Function ContinueWhenAll(Of TAntecedentResult) (tasks As Task(Of TAntecedentResult)(), continuationAction As Action(Of Task(Of TAntecedentResult)()), continuationOptions As TaskContinuationOptions) As Task

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

Remarks

The NotOn* and OnlyOn* TaskContinuationOptions, which constrain for which TaskStatus states a continuation will be executed, are illegal with ContinueWhenAll.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TAntecedentResult>
 System::Threading::Tasks::Task ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^ tasks, Action<cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^> ^ continuationAction, System::Threading::CancellationToken cancellationToken);

public System.Threading.Tasks.Task ContinueWhenAll<TAntecedentResult>(System.Threading.Tasks.Task<TAntecedentResult>[] tasks, Action<System.Threading.Tasks.Task<TAntecedentResult>[]> continuationAction, System.Threading.CancellationToken cancellationToken);

member this.ContinueWhenAll : System.Threading.Tasks.Task<'AntecedentResult>[] * Action<System.Threading.Tasks.Task<'AntecedentResult>[]> * System.Threading.CancellationToken -> System.Threading.Tasks.Task

Public Function ContinueWhenAll(Of TAntecedentResult) (tasks As Task(Of TAntecedentResult)(), continuationAction As Action(Of Task(Of TAntecedentResult)()), cancellationToken As CancellationToken) As Task

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TAntecedentResult>
 System::Threading::Tasks::Task ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^ tasks, Action<cli::array <System::Threading::Tasks::Task<TAntecedentResult> ^> ^> ^ continuationAction);

public System.Threading.Tasks.Task ContinueWhenAll<TAntecedentResult>(System.Threading.Tasks.Task<TAntecedentResult>[] tasks, Action<System.Threading.Tasks.Task<TAntecedentResult>[]> continuationAction);

member this.ContinueWhenAll : System.Threading.Tasks.Task<'AntecedentResult>[] * Action<System.Threading.Tasks.Task<'AntecedentResult>[]> -> System.Threading.Tasks.Task

Public Function ContinueWhenAll(Of TAntecedentResult) (tasks As Task(Of TAntecedentResult)(), continuationAction As Action(Of Task(Of TAntecedentResult)())) As Task

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TResult>
 System::Threading::Tasks::Task<TResult> ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, Func<cli::array <System::Threading::Tasks::Task ^> ^, TResult> ^ continuationFunction);

public System.Threading.Tasks.Task<TResult> ContinueWhenAll<TResult>(System.Threading.Tasks.Task[] tasks, Func<System.Threading.Tasks.Task[],TResult> continuationFunction);

member this.ContinueWhenAll : System.Threading.Tasks.Task[] * Func<System.Threading.Tasks.Task[], 'Result> -> System.Threading.Tasks.Task<'Result>

Public Function ContinueWhenAll(Of TResult) (tasks As Task(), continuationFunction As Func(Of Task(), TResult)) As Task(Of TResult)

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TResult>
 System::Threading::Tasks::Task<TResult> ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, Func<cli::array <System::Threading::Tasks::Task ^> ^, TResult> ^ continuationFunction, System::Threading::CancellationToken cancellationToken);

public System.Threading.Tasks.Task<TResult> ContinueWhenAll<TResult>(System.Threading.Tasks.Task[] tasks, Func<System.Threading.Tasks.Task[],TResult> continuationFunction, System.Threading.CancellationToken cancellationToken);

member this.ContinueWhenAll : System.Threading.Tasks.Task[] * Func<System.Threading.Tasks.Task[], 'Result> * System.Threading.CancellationToken -> System.Threading.Tasks.Task<'Result>

Public Function ContinueWhenAll(Of TResult) (tasks As Task(), continuationFunction As Func(Of Task(), TResult), cancellationToken As CancellationToken) As Task(Of TResult)

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TResult>
 System::Threading::Tasks::Task<TResult> ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, Func<cli::array <System::Threading::Tasks::Task ^> ^, TResult> ^ continuationFunction, System::Threading::Tasks::TaskContinuationOptions continuationOptions);

public System.Threading.Tasks.Task<TResult> ContinueWhenAll<TResult>(System.Threading.Tasks.Task[] tasks, Func<System.Threading.Tasks.Task[],TResult> continuationFunction, System.Threading.Tasks.TaskContinuationOptions continuationOptions);

member this.ContinueWhenAll : System.Threading.Tasks.Task[] * Func<System.Threading.Tasks.Task[], 'Result> * System.Threading.Tasks.TaskContinuationOptions -> System.Threading.Tasks.Task<'Result>

Public Function ContinueWhenAll(Of TResult) (tasks As Task(), continuationFunction As Func(Of Task(), TResult), continuationOptions As TaskContinuationOptions) As Task(Of TResult)

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

Remarks

The NotOn* and OnlyOn* TaskContinuationOptions, which constrain for which TaskStatus states a continuation will be executed, are illegal with ContinueWhenAll.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

Source:

TaskFactory.cs

public:
generic <typename TResult>
 System::Threading::Tasks::Task<TResult> ^ ContinueWhenAll(cli::array <System::Threading::Tasks::Task ^> ^ tasks, Func<cli::array <System::Threading::Tasks::Task ^> ^, TResult> ^ continuationFunction, System::Threading::CancellationToken cancellationToken, System::Threading::Tasks::TaskContinuationOptions continuationOptions, System::Threading::Tasks::TaskScheduler ^ scheduler);

public System.Threading.Tasks.Task<TResult> ContinueWhenAll<TResult>(System.Threading.Tasks.Task[] tasks, Func<System.Threading.Tasks.Task[],TResult> continuationFunction, System.Threading.CancellationToken cancellationToken, System.Threading.Tasks.TaskContinuationOptions continuationOptions, System.Threading.Tasks.TaskScheduler scheduler);

member this.ContinueWhenAll : System.Threading.Tasks.Task[] * Func<System.Threading.Tasks.Task[], 'Result> * System.Threading.CancellationToken * System.Threading.Tasks.TaskContinuationOptions * System.Threading.Tasks.TaskScheduler -> System.Threading.Tasks.Task<'Result>

Public Function ContinueWhenAll(Of TResult) (tasks As Task(), continuationFunction As Func(Of Task(), TResult), cancellationToken As CancellationToken, continuationOptions As TaskContinuationOptions, scheduler As TaskScheduler) As Task(Of TResult)

Type Parameters

Parameters

Returns

The new continuation task.

Exceptions

Remarks

The NotOn* and OnlyOn* TaskContinuationOptions, which constrain for which TaskStatus states a continuation will be executed, are illegal with ContinueWhenAll.

See also

• Task Parallel Library (TPL)
• Chaining Tasks by Using Continuation Tasks
• Task Cancellation