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:
System.Threading (in System.Threading.dll)
Syntax
| Visual Basic (Declaration) |
|---|
Public Function FromAsync ( _
beginMethod As Func(Of AsyncCallback, Object, IAsyncResult), _
endMethod As Action(Of IAsyncResult), _
state As Object, _
creationOptions As TaskCreationOptions _
) As Task |
| C# |
|---|
public Task FromAsync(
Func<AsyncCallback, Object, IAsyncResult> beginMethod,
Action<IAsyncResult> endMethod,
Object state,
TaskCreationOptions creationOptions
) |
Parameters
- beginMethod
- Type: System..::.Func<(Of <(AsyncCallback, Object, IAsyncResult>)>)
The delegate that begins the asynchronous operation.
- endMethod
- Type: System..::.Action<(Of <(IAsyncResult>)>)
The delegate that ends the asynchronous operation.
- 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
The created
Task that represents the
asynchronous operation.
Remarks
Exceptions
| Exception | Condition |
|---|
| System..::.ArgumentNullException | The exception that is thrown when the
beginMethod argument is null. |
| System..::.ArgumentNullException | The exception that is thrown when the
endMethod argument is null. |
| System..::.ArgumentOutOfRangeException | The exception that is thrown when the
creationOptions argument specifies an invalid TaskCreationOptions
value. |
See Also
