ContinueWhenAll(TResult) Method (Task[], Func(Task[], TResult), CancellationToken, TaskContinuationOptions, TaskScheduler)
TOC
Collapse the table of content
Expand the table of content

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

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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)

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

Type Parameters

TResult

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

Parameters

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

ExceptionCondition
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.

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

Windows Phone OS

Supported in: 8.1, 8.0

Show:
© 2017 Microsoft