FromAsync(TArg1) Method (Func(TArg1, AsyncCallback, Object, IAsyncResult), Func(IAsyncResult, TResult), TArg1, Object)

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(Of TArg1) ( _
	beginMethod As Func(Of TArg1, AsyncCallback, Object, IAsyncResult), _
	endMethod As Func(Of IAsyncResult, TResult), _
	arg1 As TArg1, _
	state As Object _
) As Task(Of TResult)
C#
public Task<TResult> FromAsync<TArg1>(
	Func<TArg1, AsyncCallback, Object, IAsyncResult> beginMethod,
	Func<IAsyncResult, TResult> endMethod,
	TArg1 arg1,
	Object state
)

Parameters

beginMethod
Type: System..::.Func<(Of <(TArg1, AsyncCallback, Object, IAsyncResult>)>)
The delegate that begins the asynchronous operation.
endMethod
Type: System..::.Func<(Of <(IAsyncResult, TResult>)>)
The delegate that ends the asynchronous operation.
arg1
Type: TArg1
The first argument passed to the beginMethod delegate.
state
Type: System..::.Object
An object containing data to be used by the beginMethod delegate.

Type Parameters

TArg1
The type of the first argument passed to the beginMethod delegate.

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.

See Also

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