TaskFactory<TResult>.FromAsync 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 ( _
asyncResult As IAsyncResult, _
endMethod As Func(Of IAsyncResult, TResult), _
creationOptions As TaskCreationOptions, _
scheduler As TaskScheduler _
) As Task(Of TResult)
public Task<TResult> FromAsync(
IAsyncResult asyncResult,
Func<IAsyncResult, TResult> endMethod,
TaskCreationOptions creationOptions,
TaskScheduler scheduler
)
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>
The created 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. |
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