TaskFactory.FromAsync<TResult> Method (IAsyncResult, Func<IAsyncResult, TResult>, TaskCreationOptions, TaskScheduler)
Assembly: mscorlib (in mscorlib.dll)
public Task<TResult> FromAsync<TResult>( IAsyncResult asyncResult, Func<IAsyncResult, TResult> endMethod, TaskCreationOptions creationOptions, TaskScheduler scheduler )
The IAsyncResult whose completion should trigger the processing of the endMethod.
The function delegate that processes the completed asyncResult.
The TaskCreationOptions value that controls the behavior of the created Task<TResult>.
Return ValueType: System.Threading.Tasks.Task< >
A Task<TResult> that represents the asynchronous operation.
The type of the result available through the Task<TResult>.
The exception that is thrown when the asyncResult argument is null.
The exception that is thrown when the endMethod argument is null.
The exception that is thrown when the scheduler argument is null.
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
The FromAsync overloads that take an asyncResult parameter are not as efficient as the overloads that take a beginMethod parameter. If performance is an issue, use the overloads that provide the beginMethod/endMethod pattern.
Available since 8
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Available since 8.1