Task.ContinueWith<TResult> Method (Func<Task, TResult>, CancellationToken, TaskContinuationOptions, TaskScheduler)
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Creates a continuation that executes according to the condition specified in continuationOptions.
Namespace: System.Threading.Tasks
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Function ContinueWith(Of TResult) ( _
continuationFunction As Func(Of Task, TResult), _
cancellationToken As CancellationToken, _
continuationOptions As TaskContinuationOptions, _
scheduler As TaskScheduler _
) As Task(Of TResult)
public Task<TResult> ContinueWith<TResult>(
Func<Task, TResult> continuationFunction,
CancellationToken cancellationToken,
TaskContinuationOptions continuationOptions,
TaskScheduler scheduler
)
Type Parameters
- TResult
The type of the result produced by the continuation.
Parameters
- continuationFunction
Type: System.Func<Task, TResult>
A function to run according to the specified continuationOptions. When run, the delegate will be passed the completed task as an argument.
- cancellationToken
Type: System.Threading.CancellationToken
The CancellationToken() that will be assigned to the new continuation 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<TResult>
A new continuation Task<TResult>.
Exceptions
| Exception | Condition |
|---|---|
| ObjectDisposedException | The Task has been disposed. -or- The CancellationTokenSource that created the token 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. If the criteria specified through the continuationOptions parameter are not met, the continuation task will be canceled instead of scheduled.
Examples
The following example shows how to use the ContinueWith method with continuation options:
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.