• Article

TaskFactory.FromAsync Method (IAsyncResult, Action<IAsyncResult>, TaskCreationOptions, TaskScheduler)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Creates a Task that executes an end method action when a specified IAsyncResult completes.

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

Syntax

'Declaration
Public Function FromAsync ( _
    asyncResult As IAsyncResult, _
    endMethod As Action(Of IAsyncResult), _
    creationOptions As TaskCreationOptions, _
    scheduler As TaskScheduler _
) As Task

public Task FromAsync(
    IAsyncResult asyncResult,
    Action<IAsyncResult> endMethod,
    TaskCreationOptions creationOptions,
    TaskScheduler scheduler
)

Parameters

  • asyncResult
    Type: System.IAsyncResult
    The IAsyncResult whose completion should trigger the processing of the endMethod.

Return Value

Type: System.Threading.Tasks.Task
The created Task that represents the asynchronous operation.

Exceptions

Exception Condition
ArgumentNullException

The exception that is thrown when the asyncResult argument is null.

-or-

The exception that is thrown when the endMethod argument is null.

-or-

The exception that is thrown when the scheduler argument is null.
ArgumentOutOfRangeException

The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value. The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value. For more information, see the Remarks for FromAsync

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.