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

 
System_CAPS_noteNote

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Creates a task that executes an end method function when a specified IAsyncResult completes.

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

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

One of the enumeration values that controls the behavior of the created task.

scheduler
Type: System.Threading.Tasks.TaskScheduler

The task scheduler that is used to schedule the task that executes the end method.

Return Value

Type: System.Threading.Tasks.Task<TResult>

The created task that represents the asynchronous operation.

Exception Condition
ArgumentNullException

The asyncResult argument is null.

-or-

The endMethod argument is null.

-or-

The scheduler argument is null.

ArgumentOutOfRangeException

The creationOptions parameter specifies an invalid value.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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