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TaskFactory(Of TResult).FromAsync Method (IAsyncResult, Func(Of IAsyncResult, TResult))

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

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

'Declaration
Public Function FromAsync ( _
	asyncResult As IAsyncResult, _
	endMethod As Func(Of IAsyncResult, TResult) _
) As Task(Of TResult)

Parameters

asyncResult
Type: System.IAsyncResult

The IAsyncResult whose completion should trigger the processing of the endMethod.

endMethod
Type: System.Func(Of IAsyncResult, TResult)

The function delegate that processes the completed asyncResult.

Return Value

Type: System.Threading.Tasks.Task(Of TResult)
A Task(Of TResult) that represents the asynchronous operation.

ExceptionCondition
ArgumentNullException

The asyncResult argument is Nothing.

-or-

The endMethod argument is Nothing.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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