TaskFactory::FromAsync Method (IAsyncResult^, Action<IAsyncResult^>^, TaskCreationOptions)
Creates a Task that executes an end method action when a specified IAsyncResult completes.
Assembly: mscorlib (in mscorlib.dll)
public:
Task^ FromAsync(
IAsyncResult^ asyncResult,
Action<IAsyncResult^>^ endMethod,
TaskCreationOptions creationOptions
)
Parameters
- asyncResult
-
Type:
System::IAsyncResult^
The IAsyncResult whose completion should trigger the processing of the endMethod.
- endMethod
-
Type:
System::Action<IAsyncResult^>^
The action delegate that processes the completed asyncResult.
- creationOptions
-
Type:
System.Threading.Tasks::TaskCreationOptions
The TaskCreationOptions value that controls the behavior of the created Task.
| 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. |
| ArgumentOutOfRangeException | The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value. For more information, see the Remarks for FromAsync |
 Tip |
|---|
The FromAsync overloads that take an asyncResult parameter are not as efficient as the overloads that take a beginMethod parameter. If performance is an issue, use the overloads that provide the beginMethod/endMethod pattern. |
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