ContinueWhenAll(TResult) Method (Task[], Func(Task[], TResult), CancellationToken, TaskContinuationOptions, TaskScheduler)

Task Parallel System.Threading

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Creates a continuation Task that will be started upon the completion of a set of provided Tasks.

Namespace: System.Threading.Tasks
Assembly: System.Threading (in System.Threading.dll)

Syntax

Visual Basic (Declaration)
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)

Visual Basic (Declaration)

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)

C#
public Task<TResult> ContinueWhenAll<TResult>( Task[] tasks, Func<Task[], TResult> continuationFunction, CancellationToken cancellationToken, TaskContinuationOptions continuationOptions, TaskScheduler scheduler )

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

Parameters

tasks: Type: array< System.Threading.Tasks..::.Task >[]()[]
The array of tasks from which to continue.

continuationFunction: Type: System..::.Func<(Of <(array< Task >[]()[], TResult>)>)
The function delegate to execute when all tasks in the tasks array have completed.

cancellationToken: Type: System.Threading..::.CancellationToken
The CancellationToken that will be assigned to the new continuation task.

continuationOptions: Type: System.Threading.Tasks..::.TaskContinuationOptions
The TaskContinuationOptions value that controls the behavior of the created continuation Task.

scheduler: Type: System.Threading.Tasks..::.TaskScheduler
The TaskScheduler that is used to schedule the created continuation Task<(Of <(TResult>)>).

Type Parameters

TResult: The type of the result that is returned by the continuationFunction delegate and associated with the created Task<(Of <(TResult>)>).

Return Value

The new continuation Task<(Of <(TResult>)>).

Remarks

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

Exceptions

Exception	Condition
System..::.ArgumentNullException	The exception that is thrown when the tasks array is null.
System..::.ArgumentNullException	The exception that is thrown when the continuationFunction argument is null.
System..::.ArgumentNullException	The exception that is thrown when the scheduler argument is null.
System..::.ArgumentException	The exception that is thrown when the tasks array contains a null value.
System..::.ArgumentException	The exception that is thrown when the tasks array is empty.
System..::.ArgumentOutOfRangeException	The exception that is thrown when the continuationOptions argument specifies an invalid TaskContinuationOptions value.
System..::.ObjectDisposedException	The exception that is thrown when one of the elements in the tasks array has been disposed.
System..::.ObjectDisposedException	The provided CancellationToken has already been disposed.