Article
11/18/2011

TaskFactory<TResult>.ContinueWhenAll<TAntecedentResult> Method (array<Task<TAntecedentResult>[], Func<array<Task<TAntecedentResult>[], TResult>, CancellationToken, TaskContinuationOptions, TaskScheduler)

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

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

Syntax

'Declaration
Public Function ContinueWhenAll(Of TAntecedentResult) ( _
    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)

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

Type Parameters

TAntecedentResult
The type of the result of the antecedent tasks.

Parameters

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

continuationFunction
Type: System.Func<array<Task<TAntecedentResult>[], TResult>
The function delegate to execute asynchronously 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<TResult>.

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

Return Value

Type: System.Threading.Tasks.Task<TResult>
The new continuation Task<TResult>.

Exceptions

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

Remarks

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

After completion, a task is in one of these states: RanToCompletion, Faulted, or Canceled states.

Version Information

Silverlight

Supported in: 5

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Change History

Date	History	Reason
	Added text to clarify asynchronous execution of continuations.	Customer feedback.

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