Article
11/18/2011

Task<TResult>.ContinueWith<TNewResult> Method (Func<Task<TResult>, TNewResult>, CancellationToken, TaskContinuationOptions, TaskScheduler)

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Creates a continuation that executes according the condition specified in continuationOptions.

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

Syntax

'Declaration
Public Function ContinueWith(Of TNewResult) ( _
    continuationFunction As Func(Of Task(Of TResult), TNewResult), _
    cancellationToken As CancellationToken, _
    continuationOptions As TaskContinuationOptions, _
    scheduler As TaskScheduler _
) As Task(Of TNewResult)

public Task<TNewResult> ContinueWith<TNewResult>(
    Func<Task<TResult>, TNewResult> continuationFunction,
    CancellationToken cancellationToken,
    TaskContinuationOptions continuationOptions,
    TaskScheduler scheduler
)

Type Parameters

TNewResult
The type of the result produced by the continuation.

Parameters

continuationFunction
Type: System.Func<Task<TResult>, TNewResult>
A function to run according the condition specified in continuationOptions.
When run, the delegate will be passed as an argument this completed task.

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

continuationOptions
Type: System.Threading.Tasks.TaskContinuationOptions
Options for when the continuation is scheduled and how it behaves. This includes criteria, such as OnlyOnCanceled, as well as execution options, such as ExecuteSynchronously.

scheduler
Type: System.Threading.Tasks.TaskScheduler
The TaskScheduler to associate with the continuation task and to use for its execution.

Return Value

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

Exceptions

Exception	Condition
ObjectDisposedException	The Task<TResult> has been disposed. -or- The CancellationTokenSource that created cancellationToken has already been disposed.
ArgumentNullException	The continuationFunction argument is null. -or- The scheduler argument is null.
ArgumentOutOfRangeException	The continuationOptions argument specifies an invalid value for TaskContinuationOptions.

ObjectDisposedException

The Task<TResult> has been disposed.

-or-

The CancellationTokenSource that created cancellationToken has already been disposed.

ArgumentNullException

The continuationFunction argument is null.

-or-

The scheduler argument is null.

ArgumentOutOfRangeException

The continuationOptions argument specifies an invalid value for TaskContinuationOptions.

Remarks

The returned Task<TResult> will not be scheduled for execution until the current task has completed, whether it completes due to running to completion successfully, faulting due to an unhandled exception, or exiting out early due to being canceled.

The continuationFunction, when executed, should return a Task<TResult>.

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.

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