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

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

Creates a Task<TResult> that executes an end method function when a specified IAsyncResult completes.

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

Syntax

'Declaration
Public Function FromAsync(Of TResult) ( _
    asyncResult As IAsyncResult, _
    endMethod As Func(Of IAsyncResult, TResult) _
) As Task(Of TResult)

public Task<TResult> FromAsync<TResult>(
    IAsyncResult asyncResult,
    Func<IAsyncResult, TResult> endMethod
)

Type Parameters

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

Parameters

  • asyncResult
    Type: System.IAsyncResult
    The IAsyncResult whose completion should trigger the processing of the endMethod.
  • endMethod
    Type: System.Func<IAsyncResult, TResult>
    The function delegate that processes the completed asyncResult.

Return Value

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

Exceptions

Exception Condition
ArgumentNullException

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

-or-

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

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.