• Article

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

Microsoft Silverlight will reach end of support after October 2021. Learn more.

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)

Syntax

'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 _
) As Task(Of TResult)

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

Type Parameters

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

Parameters

  • 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.

Return Value

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

Exceptions

Exception Condition
ArgumentNullException

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

-or-

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

Remarks

This method throws any exceptions thrown by the beginMethod.

Version Information

Silverlight

Supported in: 5

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.