Article
11/18/2011

TaskFactory.FromAsync<TArg1, TArg2> Method (Func<TArg1, TArg2, AsyncCallback, Object, IAsyncResult>, Action<IAsyncResult>, TArg1, TArg2, Object, TaskCreationOptions)

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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: mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public Function FromAsync(Of TArg1, TArg2) ( _
    beginMethod As Func(Of TArg1, TArg2, AsyncCallback, Object, IAsyncResult), _
    endMethod As Action(Of IAsyncResult), _
    arg1 As TArg1, _
    arg2 As TArg2, _
    state As Object, _
    creationOptions As TaskCreationOptions _
) As Task

public Task FromAsync<TArg1, TArg2>(
    Func<TArg1, TArg2, AsyncCallback, Object, IAsyncResult> beginMethod,
    Action<IAsyncResult> endMethod,
    TArg1 arg1,
    TArg2 arg2,
    Object state,
    TaskCreationOptions creationOptions
)

Type Parameters

TArg1
The type of the first argument passed to the beginMethod delegate.

TArg2
The type of the second argument passed to beginMethod delegate.

Parameters

beginMethod
Type: System.Func<TArg1, TArg2, AsyncCallback, Object, IAsyncResult>
The delegate that begins the asynchronous operation.

endMethod
Type: System.Action<IAsyncResult>
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.

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.

Return Value

Type: System.Threading.Tasks.Task
The created Task 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.
ArgumentOutOfRangeException	The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value. The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value. For more information, see the Remarks for FromAsync

ArgumentNullException

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

-or-

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

ArgumentOutOfRangeException

The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value. The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value. For more information, see the Remarks for FromAsync

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.

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