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

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
Assemblies:   mscorlib (in mscorlib.dll)
  System.Threading.Tasks (in System.Threading.Tasks.dll)

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

Type Parameters

TResult

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

Parameters

beginMethod
Type: System.Func<AsyncCallback, Object, IAsyncResult>

The delegate that begins the asynchronous operation.

endMethod
Type: System.Func<IAsyncResult, TResult>

The delegate that ends the asynchronous operation.

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.

.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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