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

Usage Note

This code implements support for the following construct without requiring the use of /.

try
{
    await task.ConfigureAwait(false);
}
catch
{
    if (!supportsErrors)
        throw;
}

return continuationFunction(task);

If the antecedent task is canceled, 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.

.NET for Windows Store apps

.NET Framework

Portable Class Library

Threading Library

Reference