TaskFactory<TResult>::FromAsync Method (Func<AsyncCallback^, Object^, IAsyncResult^>^, Func<IAsyncResult^, TResult>^, Object^)
Creates a task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern.
Assembly: mscorlib (in mscorlib.dll)
public:
Task<TResult>^ FromAsync(
Func<AsyncCallback^, Object^, IAsyncResult^>^ beginMethod,
Func<IAsyncResult^, TResult>^ endMethod,
Object^ state
)
Parameters
- beginMethod
-
Type:
System::Func<AsyncCallback^, Object^, IAsyncResult^>^
The delegate that begins the asynchronous operation.
- endMethod
-
Type:
System::Func<IAsyncResult^, TResult>^
The delegate that ends the asynchronous operation.
- 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 that represents the asynchronous operation.
| Exception | Condition |
|---|---|
| ArgumentNullException | The beginMethod argument is null. -or- The endMethod argument is null. |
This method throws any exceptions thrown by the beginMethod. Exceptions for endmethod are thrown when waiting on the returned task.
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1