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(Of TResult) ( _
beginMethod As Func(Of AsyncCallback, Object, IAsyncResult), _
endMethod As Func(Of IAsyncResult, TResult), _
state As Object _
) As Task(Of TResult) |
| C# |
|---|
public Task<TResult> FromAsync<TResult>(
Func<AsyncCallback, Object, IAsyncResult> beginMethod,
Func<IAsyncResult, TResult> endMethod,
Object state
)
|
Parameters
- beginMethod
- Type: System..::.Func<(Of <(AsyncCallback, Object, IAsyncResult>)>)
The delegate that begins the asynchronous operation.
- endMethod
- Type: System..::.Func<(Of <(IAsyncResult, TResult>)>)
The delegate that ends the asynchronous operation.
- state
- Type: System..::.Object
An object containing data to be used by the beginMethod
delegate.
Type Parameters
- TResult
- The type of the result available through the
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. |
See Also
