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

May 11, 2014

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

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

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

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 when one task completes.
continuationFunction
Type: System.Func<Task, TResult>
The function delegate to execute asynchronously when one task in the tasks array completes.
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 ContinueWhenAny.

Windows Phone OS

Supported in: 8.1, 8.0

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