CoreTaskExtensionsSelectTResult Method (Task, FuncTask, TResult, Boolean) |
Synchronously execute a continuation when a task completes. The supportsErrors
parameter specifies whether the continuation is executed if the antecedent task is faulted.
Namespace: net.openstack.CoreAssembly: openstacknet (in openstacknet.dll) Version: 1.7.7+Branch.master.Sha.25d803f397c8693c2c13777ef6675f796f520f2c
Syntax public static Task<TResult> Select<TResult>(
this Task task,
Func<Task, TResult> continuationFunction,
bool supportsErrors
)
<ExtensionAttribute>
Public Shared Function Select(Of TResult) (
task As Task,
continuationFunction As Func(Of Task, TResult),
supportsErrors As Boolean
) As Task(Of TResult)
public:
[ExtensionAttribute]
generic<typename TResult>
static Task<TResult>^ Select(
Task^ task,
Func<Task^, TResult>^ continuationFunction,
bool supportsErrors
)
[<ExtensionAttribute>]
static member Select :
task : Task *
continuationFunction : Func<Task, 'TResult> *
supportsErrors : bool -> Task<'TResult>
Parameters
- task
- Type: System.Threading.TasksTask
The antecedent task. - continuationFunction
- Type: SystemFuncTask, TResult
The continuation function to execute when task completes. - supportsErrors
- Type: SystemBoolean
if the continuationFunction properly handles a faulted antecedent task; otherwise, .
Type Parameters
- TResult
- The type of the result produced by the continuation TaskTResult.
Return Value
Type:
TaskTResultA
Task representing the asynchronous operation. When the task completes successfully,
the
Result property will contain the result returned from the
continuationFunction.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type
Task. When you use instance method syntax to call this method, omit the first parameter. For more information, see
Extension Methods (Visual Basic) or
Extension Methods (C# Programming Guide).
Exceptions Remarks If the antecedent task is cancelled, or faulted with supportsErrors
set to , the status of the antecedent is directly applied to the task
returned by this method; it is not wrapped in an additional AggregateException.
Notes to Callers |
---|
Since the continuation is executed synchronously, this method should only be used for
lightweight continuation functions. For non-trivial continuation functions, use a
Task for the continuation operation and call
ThenTResult(Task, FuncTask, TaskTResult, Boolean) instead.
|
Version Information .NET Framework
Supported in: 4.5
openstack.net
Supported in: 1.6, 1.5, 1.4, 1.3.6
See Also