TaskFactory.FromAsync<TResult> Method (IAsyncResult, Func<IAsyncResult, TResult>, TaskCreationOptions, TaskScheduler)
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Creates a Task<TResult> that executes an end method function when a specified IAsyncResult completes.
Namespace: System.Threading.Tasks
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Function FromAsync(Of TResult) ( _
asyncResult As IAsyncResult, _
endMethod As Func(Of IAsyncResult, TResult), _
creationOptions As TaskCreationOptions, _
scheduler As TaskScheduler _
) As Task(Of TResult)
public Task<TResult> FromAsync<TResult>(
IAsyncResult asyncResult,
Func<IAsyncResult, TResult> endMethod,
TaskCreationOptions creationOptions,
TaskScheduler scheduler
)
Type Parameters
- TResult
The type of the result available through the Task<TResult>.
Parameters
- asyncResult
Type: System.IAsyncResult
The IAsyncResult whose completion should trigger the processing of the endMethod.
- endMethod
Type: System.Func<IAsyncResult, TResult>
The function delegate that processes the completed asyncResult.
- creationOptions
Type: System.Threading.Tasks.TaskCreationOptions
The TaskCreationOptions value that controls the behavior of the created Task<TResult>.
- scheduler
Type: System.Threading.Tasks.TaskScheduler
The TaskScheduler that is used to schedule the task that executes the end method.
Return Value
Type: System.Threading.Tasks.Task<TResult>
A Task<TResult> 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.
See Also