TaskFactory<TResult>::FromAsync Method (IAsyncResult^, Func<IAsyncResult^, TResult>^, TaskCreationOptions, TaskScheduler^)
.NET Framework (current version)
Creates a task that executes an end method function when a specified IAsyncResult completes.
Assembly: mscorlib (in mscorlib.dll)
public:
Task<TResult>^ FromAsync(
IAsyncResult^ asyncResult,
Func<IAsyncResult^, TResult>^ endMethod,
TaskCreationOptions creationOptions,
TaskScheduler^ scheduler
)
Parameters
- asyncResult
-
Type:
System::IAsyncResult^
The IAsyncResult whose completion should trigger the processing of the endMethod.
- endMethod
-
Type:
System::Func<IAsyncResult^, TResult>^
The function delegate that processes the completed asyncResult.
- creationOptions
-
Type:
System.Threading.Tasks::TaskCreationOptions
One of the enumeration values that controls the behavior of the created task.
- scheduler
-
Type:
System.Threading.Tasks::TaskScheduler^
The task scheduler that is used to schedule the task that executes the end method.
Return Value
Type: System.Threading.Tasks::Task<TResult>^The created task that represents the asynchronous operation.
| Exception | Condition |
|---|---|
| ArgumentNullException | The asyncResult argument is null. -or- The endMethod argument is null. -or- The scheduler argument is null. |
| ArgumentOutOfRangeException | The creationOptions parameter specifies an invalid value. |
Universal Windows Platform
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
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
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