FromAsync Method (Func(AsyncCallback, Object, IAsyncResult), Action(IAsyncResult), Object, TaskCreationOptions)

Task Parallel System.Threading

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Creates a Task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.

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

Syntax

Visual Basic (Declaration)
Public Function FromAsync ( _
	beginMethod As Func(Of AsyncCallback, Object, IAsyncResult), _
	endMethod As Action(Of IAsyncResult), _
	state As Object, _
	creationOptions As TaskCreationOptions _
) As Task
C#
public Task FromAsync(
	Func<AsyncCallback, Object, IAsyncResult> beginMethod,
	Action<IAsyncResult> endMethod,
	Object state,
	TaskCreationOptions creationOptions
)

Parameters

beginMethod
Type: System..::.Func<(Of <(AsyncCallback, Object, IAsyncResult>)>)
The delegate that begins the asynchronous operation.
endMethod
Type: System..::.Action<(Of <(IAsyncResult>)>)
The delegate that ends the asynchronous operation.
state
Type: System..::.Object
An object containing data to be used by the beginMethod delegate.
creationOptions
Type: System.Threading.Tasks..::.TaskCreationOptions
The TaskCreationOptions value that controls the behavior of the created Task.

Return Value

The created Task that represents the asynchronous operation.

Remarks

This method throws any exceptions thrown by the beginMethod.

Exceptions

ExceptionCondition
System..::.ArgumentNullExceptionThe exception that is thrown when the beginMethod argument is null.
System..::.ArgumentNullExceptionThe exception that is thrown when the endMethod argument is null.
System..::.ArgumentOutOfRangeExceptionThe exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value.

See Also

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