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TaskFactory.FromAsync<TArg1, TArg2, TArg3, TResult> Method (Func<TArg1, TArg2, TArg3, AsyncCallback, Object, IAsyncResult>, Func<IAsyncResult, TResult>, TArg1, TArg2, TArg3, Object)

July 28, 2014

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

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

public Task<TResult> FromAsync<TArg1, TArg2, TArg3, TResult>(
	Func<TArg1, TArg2, TArg3, AsyncCallback, Object, IAsyncResult> beginMethod,
	Func<IAsyncResult, TResult> endMethod,
	TArg1 arg1,
	TArg2 arg2,
	TArg3 arg3,
	Object state
)

Type Parameters

TArg1

The type of the second argument passed to beginMethod delegate.

TArg2

The type of the third argument passed to beginMethod delegate.

TArg3

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

TResult

The type of the result available through the Task<TResult>.

Parameters

beginMethod
Type: System.Func<TArg1, TArg2, TArg3, AsyncCallback, Object, IAsyncResult>
The delegate that begins the asynchronous operation.
endMethod
Type: System.Func<IAsyncResult, TResult>
The delegate that ends the asynchronous operation.
arg1
Type: TArg1
The first argument passed to the beginMethod delegate.
arg2
Type: TArg2
The second argument passed to the beginMethod delegate.
arg3
Type: TArg3
The third argument passed to the beginMethod delegate.
state
Type: System.Object
An object containing data to be used by the beginMethod delegate.

Return Value

Type: System.Threading.Tasks.Task<TResult>
The created Task<TResult> that represents the asynchronous operation.

ExceptionCondition
ArgumentNullException

The exception that is thrown when the beginMethod argument is null.

-or-

The exception that is thrown when the endMethod argument is null.

This method throws any exceptions thrown by the beginMethod.

Windows Phone OS

Supported in: 8.1, 8.0

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