FromAsync(TArg1, TResult) Method (Func(TArg1, AsyncCallback, Object, IAsyncResult), Func(IAsyncResult, TResult), TArg1, 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(Of TArg1, TResult) ( _ beginMethod As Func(Of TArg1, AsyncCallback, Object, IAsyncResult), _ endMethod As Func(Of IAsyncResult, TResult), _ arg1 As TArg1, _ state As Object, _ creationOptions As TaskCreationOptions _ ) As Task(Of TResult)

Visual Basic (Declaration)

Public Function FromAsync(Of TArg1, TResult) ( _
	beginMethod As Func(Of TArg1, AsyncCallback, Object, IAsyncResult), _
	endMethod As Func(Of IAsyncResult, TResult), _
	arg1 As TArg1, _
	state As Object, _
	creationOptions As TaskCreationOptions _
) As Task(Of TResult)

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

public Task<TResult> FromAsync<TArg1, TResult>(
	Func<TArg1, AsyncCallback, Object, IAsyncResult> beginMethod,
	Func<IAsyncResult, TResult> endMethod,
	TArg1 arg1,
	Object state,
	TaskCreationOptions creationOptions
)

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.

creationOptions: Type: System.Threading.Tasks..::.TaskCreationOptions
The TaskCreationOptions value that controls the behavior of the created Task.

Type Parameters

TArg1: The type of the first argument passed to the beginMethod delegate.
TResult: The type of the result available through the Task.

Return Value

The created Task that represents the asynchronous operation.

Remarks

This method throws any exceptions thrown by the beginMethod.

Exceptions

Exception	Condition
System..::.ArgumentNullException	The exception that is thrown when the beginMethod argument is null.
System..::.ArgumentNullException	The exception that is thrown when the endMethod argument is null.
System..::.ArgumentOutOfRangeException	The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value.