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

Task Parallel System.Threading

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Creates a continuation that executes when the target Task<(Of <(TResult>)>) completes.

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

Syntax

Visual Basic (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)

Visual Basic (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)

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

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

Parameters

continuationFunction: Type: System..::.Func<(Of <(Task<(Of <(TResult>)>), TNewResult>)>)
A function to run when the Task<(Of <(TResult>)>) completes. 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.

Type Parameters

TNewResult: The type of the result produced by the continuation.

Return Value

A new continuation Task<(Of <(TResult>)>).

Remarks

The returned Task<(Of <(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<(Of <(TResult>)>). This task's completion state will be transferred to the task returned from the ContinueWith call.

Exceptions

Exception	Condition
System..::.ArgumentNullException	The continuationFunction argument is null.
System..::.ArgumentOutOfRangeException	The continuationOptions argument specifies an invalid value for TaskContinuationOptions.
System..::.ArgumentNullException	The scheduler argument is null.
System..::.ObjectDisposedException	The Task<(Of <(TResult>)>) has been disposed.
System..::.ObjectDisposedException	The provided CancellationToken has already been disposed.