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

[ 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<TAntecedentResult, TResult>(
	Task<TAntecedentResult>[] tasks,
	Func<Task<TAntecedentResult>[], TResult> continuationFunction,
	TaskContinuationOptions continuationOptions
)

Type Parameters

TAntecedentResult

The type of the result of the antecedent tasks.

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<TAntecedentResult> []
The array of tasks from which to continue.
continuationFunction
Type: System.Func< Task<TAntecedentResult> [], TResult>
The function delegate to execute asynchronously when all tasks in the tasks array have completed.
continuationOptions
Type: System.Threading.Tasks.TaskContinuationOptions
The TaskContinuationOptions value that controls the behavior of the created continuation Task<TResult>.

Return Value

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

ExceptionCondition
ObjectDisposedException

The exception that is thrown when one of the elements in the tasks array has been disposed.

ArgumentNullException

The exception that is thrown when the tasks array is null.

-or-

The exception that is thrown when the continuationFunction argument is null.

ArgumentOutOfRangeException

The exception that is thrown when the continuationOptions argument specifies an invalid TaskContinuationOptions value.

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

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